–1– AECTB7E 201510-T
ORDERING INFORMATION
Miniature Size
Sealed Switches
TURQUOISE SWITCHES
ABV (BV) SWITCHES
FEATURES
• Integral construction of body and
cover, sealed switches
• Long life (Mechanical life: Min. 5 ×
106)
• Wide variation.
TYPICAL APPLICATIONS
• Automotive
• Agricultural machinery (Combine,
Rice planting machine)
• Ice maker, etc.
33.0 10.3
15.9
Terminal type
Wire leads
(Unit: mm)
RoHS compliant
ABV 1
Operating Force (OF)
by pin plunger (max.)
4: 0.98 N
5: 1.96 N
Safety standard
Null: Safety standard un-acquiring
3: UL/C-UL, ENEC/VDE
R: Improved short roller lever
Contact material
0: AgNi alloy
1: AgNi alloy + Au-clad
Notes: 1. Standard packing: Dust protected type 50 pcs./carton, 500 pcs./case; Immersion protected type 50 pcs./case.
2. Not every combination is available. Please refer to the following table, “PRODUCT TYPES”.
Actuator
0: Pin plunger
2: Hinge lever
4: Simulated roller lever
5: Short roller lever
6: Roller lever
Terminal
2: .187 quick-connect terminal
6: Wire leads
Contact form
1: SPDT 2: SPST-NC
3: SPST-NO
NC
COM
NC
NO
COM
NO
COM
CONSTRUCTION
Terminal type Wire leads
APPLICABLE CURRENT RANGE
(Reference)
Rubber cap
Ultrasonic swaging technology
contribute for sealing
Epoxy resin Epoxy resin (include)
Wire leads
AgNi alloy contact
1mA
100mA
3A
5A
0
30V
250V
5V
5V
15V
15V
DC
AC
AgNi alloy + Au-clad contact
ABV (BV) Turquoise Switches
–2– AECTB7E 201510-T
PRODUCT TYPES
■ AgNi alloy contact type
■ AgNi alloy + Au-clad contact type
Actuator Contact form Operating Force OF,
Max.
.187 Quick-connect terminal Wire Leads
Part number Part number
Pin plunger
SPDT 0.98 N ABV1210403 ABV1610403
1.96 N ABV1210503 ABV1610503
SPST-NC 0.98 N ABV1220403 ABV1620403
1.96 N ABV1220503 ABV1620503
SPST-NO 0.98 N ABV1230403 ABV1630403
1.96 N ABV1230503 ABV1630503
Hinge lever
SPDT 0.59 N ABV1212403 ABV1612403
1.18 N ABV1212503 ABV1612503
SPST-NC 0.59 N ABV1222403 ABV1622403
1.18 N ABV1222503 ABV1622503
SPST-NO 0.59 N ABV1232403 ABV1632403
1.18 N ABV1232503 ABV1632503
Simulated roller lever
SPDT 0.59 N ABV1214403 ABV1614403
1.18 N ABV1214503 ABV1614503
SPST-NC 0.59 N ABV1224403 ABV1624403
1.18 N ABV1224503 ABV1624503
SPST-NO 0.59 N ABV1234403 ABV1634403
1.18 N ABV1234503 ABV1634503
Short roller lever
SPDT 1.08 N ABV1215403R ABV1615403R
2.16 N ABV1215503R ABV1615503R
SPST-NC 1.08 N ABV1225403R ABV1625403R
2.16 N ABV1225503R ABV1625503R
SPST-NO 1.08 N ABV1235403R ABV1635403R
2.16 N ABV1235503R ABV1635503R
Roller lever
SPDT 0.59 N ABV1216403 ABV1616403
1.18 N ABV1216503 ABV1616503
SPST-NC 0.59 N ABV1226403 ABV1626403
1.18 N ABV1226503 ABV1626503
SPST-NO 0.59 N ABV1236403 ABV1636403
1.18 N ABV1236503 ABV1636503
Actuator Contact form Operating Force OF,
Max.
.187 Quick-connect terminal Wire Leads
Part number Part number
Pin plunger
SPDT 0.98 N ABV1210413 ABV1610413
1.96 N ABV1210513 ABV1610513
SPST-NC 0.98 N ABV1220413 ABV1620413
1.96 N ABV1220513 ABV1620513
SPST-NO 0.98 N ABV1230413 ABV1630413
1.96 N ABV1230513 ABV1630513
Hinge lever
SPDT 0.59 N ABV1212413 ABV1612413
1.18 N ABV1212513 ABV1612513
SPST-NC 0.59 N ABV1222413 ABV1622413
1.18 N ABV1222513 ABV1622513
SPST-NO 0.59 N ABV1232413 ABV1632413
1.18 N ABV1232513 ABV1632513
Simulated roller lever
SPDT 0.59 N ABV1214413 ABV1614413
1.18 N ABV1214513 ABV1614513
SPST-NC 0.59 N ABV1224413 ABV1624413
1.18 N ABV1224513 ABV1624513
SPST-NO 0.59 N ABV1234413 ABV1634413
1.18 N ABV1234513 ABV1634513
Short roller lever
SPDT 1.08 N ABV1215413R ABV1615413R
2.16 N ABV1215513R ABV1615513R
SPST-NC 1.08 N ABV1225413R ABV1625413R
2.16 N ABV1225513R ABV1625513R
SPST-NO 1.08 N ABV1235413R ABV1635413R
2.16 N ABV1235513R ABV1635513R
Roller lever
SPDT 0.59 N ABV1216413 ABV1616413
1.18 N ABV1216513 ABV1616513
SPST-NC 0.59 N ABV1226413 ABV1626413
1.18 N ABV1226513 ABV1626513
SPST-NO 0.59 N ABV1236413 ABV1636413
1.18 N ABV1236513 ABV1636513
ABV (BV) Turquoise Switches
–3– AECTB7E 201510-T
SPECIFICATIONS
■ Rating
■ Characteristics
Note: Test conditions and judgement are complying with “NECA C4505”.
■ Operating characteristics
DIMENSIONS
■ .187 quick-connect terminal
Pin plunger
Standard rating Low-level rating
AgNi alloy + Au-clad contact
Plunger color: Red 3 A 250 V AC (OF 1.96 N), 1 A 250 V AC (OF 0.98 N) 6 V DC 5 mA, 12 V DC 2 mA, 24 V DC 1 mA
AgNi alloy contact
Plunger color: Black 5 A 250 V AC (OF 1.96 N), 3 A 250 V AC (OF 0.98 N) —
Item Specifications
Expected life
Mechanical life (OT: Specified value) Min. 5x106 (at 60 cpm)
Electrical life Nominal rating (OT: Max.) Min. 105 (at 20 cpm)
Low-level rating (OT: Specified value) Min. 106 (at 20 cpm) OF 0.98N type is Min 5 × 105 (at 20 com)
Insulation resistance Min. 100 MΩ (at 500 V DC insulation resistance meter)
Dielectric
strength
Between non-continuous terminals 1,000 Vrms
Between each terminal and other exposed metal parts 2,000 Vrms
Between each terminal and ground 2,000 Vrms
Vibration resistance 10 to 55 Hz at single amplitude of 0.75 mm (Contact opening: max. 1 msec.)
Shock resistance Min. 294 m/s2 (Contact opening: Max. 1 msec.)
Contact
resistance
AgNi alloy contact type Terminal type: Max. 50 mΩ
Wire leads: Max. 100 mΩ
AgNi alloy + Au-clad contact type Terminal type: Max. 50 mΩ
Wire leads: Max. 100 mΩ
Allowable operating speed 1 to 500 mm/sec.
Max. operating cycle rate 120 cpm
Ambient temperature −40°C to +85°C
Unit weight Approx. 7 g (Terminal type)
Protection grade IP67 (except exposed terminal part of terminal type)
Actuator 8th digit of
Part No.
Operating Force
OF, Max.
Release Force RF,
Min. Pretravel PT, Max.
Movement
Differential MD,
Max.
Overtravel OT, Min. Operating position
OP
Pin plunger 4 0.98N 0.25N 1.6 mm 0.4 mm 0.8 mm 14.7±0.6 mm
5 1.96N 0.39N 1.6 mm 0.4 mm 0.8 mm 14.7±0.6 mm
Hinge lever 4 0.59N 0.098N 3.2 mm 1.2 mm 1.2 mm 15.3±1.2 mm
5 1.18N 0.13N 3.2 mm 1.2 mm 1.2 mm 15.3±1.2 mm
Simulated roller lever 4 0.59N 0.098N 3.2 mm 1.2 mm 1.2 mm 18.5±1.2 mm
5 1.18N 0.13N 3.2 mm 1.2 mm 1.2 mm 18.5±1.2 mm
Short roller lever 4 1.08N 0.20N 1.6 mm 0.5 mm 0.8 mm 20.7±0.8 mm
5 2.16N 0.39N 1.6 mm 0.5 mm 0.8 mm 20.7±0.8 mm
Roller lever 4 0.59N 0.098N 3.2 mm 1.2 mm 1.2 mm 20.7±1.2 mm
5 1.18N 0.13N 3.2 mm 1.2 mm 1.2 mm 20.7±1.2 mm
(by voltage drop 1 A 6 to 8 V DC)
(by voltage drop 0.1 A 6 to 8 V DC)
(Unit: mm) General tolerance: ±0.4
The CAD data of the products with a CAD Data mark can be downloaded from: http://industrial.panasonic.com/ac/e/
External dimensions
22.2±0.1
10.3±0.1
2.8
3.4
Operating
Position
14.7±0.6
Pretravel
1.6 max
2.8
0.5 15.9
5.2
5.2
10.3
10
2.5
4.75
20.2±0.3
33
45.5
42
3.1 dia.
+0.25
–0.05
3.1+0.25
–0.05
Pretravel PT, Max. 1.6mm
Movement Differential
MD, Max. 0.4mm
Overtravel OT, Min. 0.8mm
Operating Position
OP 14.7±0.6mm
CAD Data
ABV (BV) Turquoise Switches
–4– AECTB7E 201510-T
Hinge lever External dimensions
Simulated roller lever
Short roller lever
Roller lever
■ Wire Leads
R30.8
Operating Position
15.3±1.2
10.6
17.2
5
35.8±0.5
Pretravel
3.2 max.
Pretravel PT, Max. 3.2mm
Movement Differential
MD, Max. 1.2mm
Overtravel OT, Min. 1.2mm
Operating Position
OP 15.3±1.2mm
CAD Data
External dimensions
Pretravel
3.2 max.
R27.8
32.8±0.5
Operating Position
18.5±1.2
5
Pretravel PT, Max. 3.2mm
Movement Differential
MD, Max. 1.2mm
Overtravel OT, Min. 1.2mm
Operating Position
OP 18.5±1.2mm
CAD Data
External dimensions
24.6±0.5
4.9
4.8 dia.
20.6±0.5
Operating Position
20.7±0.8
R 17.2
Pretravel
1.6 max.
Pretravel PT, Max. 1.6mm
Movement Differential
MD, Max. 0.5mm
Overtravel OT, Min. 0.8mm
Operating Position
OP 20.7±0.8mm
CAD Data
External dimensions
Operating Position
20.7±1.2
R30.0
Pretravel
3.2 max. 4.9
4.8 dia.
34.2±0.5
Pretravel PT, Max. 3.2mm
Movement Differential
MD, Max. 1.2mm
Overtravel OT, Min. 1.2mm
Operating Position
OP 20.7±1.2mm
CAD Data
External dimensions
10.3
10
Operating
Position
14.7±0.6
Pretravel
1.6 max.
10.3±0.1
3.4
2.8
2.8
22.2±0.1
36 300±10
15.9
20.2±0.3
3.1 dia.
+0.25
–0.05
3.1+0.25
–0.05
Thickness of the lead wire:
0.75mm2 (Note 2)
Color of the lead wire
NC ......red
NO ......white
COM ...black
CAD Data Notes: 1. Dimensions of the actuator types are the
same as those of corresponding solder
and .187 quick-connect terminal types.
2. With UL and CSA approved products, lead
wire is changed to UL compliant (AWG18).
–1– AECTB35E 201510-T
CAUTIONS FOR USE (Common for BJ, BS and BV types)
Notes for Turquoise Switches (BJ, BS, BV type)
■ Fastening of the switch body
1) Fasten the switch body onto a smooth surface using the
correct screw as shown in the chart below and tighten it with the
prescribed torque.
The switch case may deform depending on the type of screw
(screw head diameter, etc.), the size of the washer, and the use
or non-use of a washer. Therefore, please confirm the
appropriate torque of actual conditions. Also, it is recommended
that adhesive be applied to lock the screws to prevent loosening
of the screws. When doing so, please be careful not let any
adhesive get inside the switch.
2) Fixed pin type
To secure the switch unit, thermally crimp or press-fit the
mounting pins. If the pins are to be press-fitted, install a guide on
the opposite surface to the mounting pins to prevent them from
slipping out of position and developing play.
3) Be sure to maintain adequate insulating clearance between
each terminal and ground.
4) The positioning of the switch should be such that direct force
is not applied to the pushbutton or actuator in its free position.
The operating force to the pushbutton should only be applied in
a perpendicular direction.
5) The standard value of overtravel used should be within the
range of 70% to 100% of the rated OT value.
6) When soldering the BV type turquoise switch or the
immersion protected type of the BJ and BS type switches, the
sealing material sometimes forms a lump or bulge at the base of
the terminal or lead. Be sure to allow enough space for this
when attaching the switch.
■ Soldering operations
1) Manual soldering: Perform soldering in less than 3 seconds
with maximum 350°C iron. Care should be taken not to apply
force to the terminals during soldering. We recommend a
soldering iron with temperature adjustment in order to prevent
poor quality soldering.
Please consult us if you intend to use a soldering iron of 60 W or
higher.
2) Terminal portions should not be moved within 1 minute after
soldering.
■ Selection of the switch
Allow for up to ±20% variation of the specified characteristics
values to compensate for long term operational wear of the
switch in your design.
■ Cautions regarding use
1) When switching inductive loads (relays, solenoids, buzzers,
etc.), an arc absorbing circuit is recommended to protect the
contacts.
2) If switching of the contact is synchronized with the phase of
the AC power, reduced electrical life or welded contact may
occur. Therefore, test the switch while it is operating under actual
loads for this condition. If found, you may wish to take corrective
action in your design.
3) In the slow or high speed operating condition, the electrical
life might be greatly reduced depending upon the switching load.
Please consult us before use.
4) Using lever type in do not condition, there is the concern that
the flexible part may be impeded and return movement may not
be possible. In this situation take the following precautions:
• Select a product of higher OF or use a leaf type lever.
• Attach a protective cover to the lever.
5) If the leaf lever type switch is excessively pushed (pushed
further than the operational limit position) or switching is done at
high speed or is accompanied by the impact, the lever will break.
Please be careful. Also, be careful with the short roller lever type
ABV (BV) switch as improper return may result from pressing
too much.
■ Protection from dust, water and corrosive gas
1) The pin button and the space around the body cap Turquoise
switches are sealed with elastic material, the terminal portion is
integrally molded. This prevents dust entry and protects the
switch against corrosive gases. Wireleaded types are
recommended for applications subject to water or oil splash.
However, avoid soaking these immersion protected types in oil
or water, because those types are not of completely oil tight
construction.
2) Switch operation or rapid temperature change while water
droplets are on the switch may cause the water invasion inside
the switch because of breathing action on condensation.
Especially do not use switch in a bath.
If sources of silicon gas are existing in the vicinity of the switch
(silicon rubber, silicon oil, silicon coating, and silicon filler, etc.),
silicon gas (low molecular siloxane, etc.) will be emitted and it
will get into the product due to the permeability of the plastic.
If the switch is used or stored in such an environment, silicon
compound might generate on the contacts, cause the and faulty
contacting. Therefore, please do not use sources that can emit
silicon gas in the vicinity of the switch.
Do not use in areas where flammable or explosive gases from
gasoline and thinner, etc., may be present.
Screws Tightening torque
ABJ (BJ) switches
M1.2 Not more than 0.098N·m
M2.3 Not more than 0.29N·m
M3.0 Not more than 0.29N·m
ABS (BS) switches M2.3 Not more than 0.29N·m
ABV (BV) switches M3.0 Not more than 0.49N·m
Soldering time
ABJ (BJ) switches Within 3 seconds
ABS (BS) switches Within 3 seconds
ABV (BV) switches Within 5 seconds
Notes for Turquoise Switches (BJ, BS, BV type)
–2– AECTB35E 201510-T
REFERENCE
• Dust protection test
Test conditions: The talcum powder used shall be able to pass
through a square- meshed sieve the nominal wire diameter of 7
μm. The amount of talcum powder to be used is 2 kg per cubic
metre of the test chamber volume. The duration of the test is 8
hours.
No damage observed after the test.
• Waterproof test
Test conditions: Immersion protected IP67 switches ...
Submerge at 1 m below the water surface for 30 minutes.
• Hydrogen sulfide exposure test
Test conditions: Concentration: 3 ppm, Temperature: 40°C
104°F, Humidity: 75% RH
■ Oil-proof and chemical-proof characteristics
The rubber elastomer swells when exposed to oil and chemicals.
The extent of swelling will vary widely depending on the type and
amount of oil and chemicals.
Check with the actual oil or chemicals used.
In particular, be aware that solvents such as freon, chlorine, and
toluene cannot be used.
■ Washability [ABJ (BJ) and ABS (BS)]
Do not clean the switch. Doing so can cause problems. Please
contact us if cleaning is necessary.
1Ω
100mΩ
10mΩ
2 4 6 8 10 12 14 16 18 20 22 24
Standard
value 8 hours
Elapsed time (h)
Contact resistance
1000
100
10
2 4 6 8 10 12 14 16 18 20 22 24
Standard value
30 minutes
Elapsed time (h)
Insulation resistance (MΩ)
0 100 200 300 400 500
100Ω
10Ω
1Ω
100mΩ
10mΩ
Elapsed time (h)
Contact resistance
Turquoise switches
Typical products
■ Dust-protected type
This type of construction prevents dust that is large enough to
have an effect on operation from getting inside the unit. This
construction is stipulated by protective classes against solid
matter in the IEC standards (IEC60529).
The talcum powder used shall be able to pass through a square-
meshed sieve the nominal wire diameter of 7 μm. The amount of
talcum powder to be used is 2 kg per cubic metre of the test
chamber volume. The duration of the test is 8 hours.
No damage observed after the test.
■ Immersion-protected type
This type of construction prevents any harmful effects even after
the device is left underwater at a depth of 1 m for 30 minutes.
This construction is stipulated by protective classes against
water in the IEC standards (IEC60529).
■ IEC’s IP Codes
The IEC (International Electrotechnical Commission) has
defined the IP characteristic code that represents the levels of
protection described in IEC standard (IEC60529).
The two numbers that follow the IP code (the characteristics
numbers) indicate the suitability of this protection for all
environmental conditions.
• Level of protection indicated by the 1st Characteristics number
• Level of protection indicated by the 2nd Characteristics number
Note: Details of test conditions are the same as NECA C 0920. Please refer to them.
1st characteristics number
2nd characteristics number
IP
1st
Characteristics number Protection level (IEC60529/Solid matter)
0 No protection
1 Protected against solid matter larger than 50mm
2 Protected against solid matter larger than 12mm
3 Protected against solid matter larger than 2.5mm
4 Protected against solid matter larger than 1.0mm
5
Dust-protected type
Prevents dust that is large enough to have an effect
on operation from getting inside the unit
6Dust-resistant type
Prevents dust from getting inside the unit
JIS C0920
2nd
Characteristics
number
Protection level (IEC60529/Liquid matter)
0 No protection
Droplet-protected
type I 1Protected against water droplets that fall
perpendicular to the unit
Droplet-protected
type II 2Protected against water droplets that fall
from within 15° of perpendicular to the unit
Rain-protected
type 3Protected against water droplets that fall
from within 60° of perpendicular to the unit
Splash-protected
type 4Protected against water that splashes on
the unit from any direction
Spray-protected
type 5Free from adverse effects even if sprayed
directly with water from any direction
Water-resistant
type 6Protected against water sprayed directly
on the unit from any direction
Immersion-
protected type 7
Water does not get inside of the unit when
submerged in water according to the
specified conditions
Underwater type 8 Unit can be used underwater
–1– AECTB36E 201510-T
(Snap-action, Detection and Interlock Switches)
TECHNICAL TERMINOLOGY
Technical Terminology & Cautions for Use
■ Snap-action switches
A compact switch equipped with an enclosed micro-gap snap-
action contact mechanism that makes a specified motion with a
specified force to open/close a circuit, and an actuator outside
the enclosure (hereinafter referred to as the switch)
■ Actuator
A part of the switch that transmits the received external force to
an internal spring mechanism to move the movable contact so
that the switch can be opened and closed
■ Actuator stopper
A part of the switch to limit the actuator movement in the switch
operation direction
■ Rated values
Values indicating the characteristics and performance guarantee
standards of the snap-action switches. The rated current and
rated voltage, for instance, assume specific conditions (type of
load, current, voltage, frequency, etc.).
■ Mechanical life
The service life when operated at a preset operating frequency
without passing electricity through the contacts. (The life test is
performed at a switching frequency of 60 times/minute and
operating speed of 100 mm/second at the regular cam.)
■ Electrical life
The service life when the rated load is connected to the contact
and switching operations are performed. (The life test is
performed at a switching frequency of 20 times/minute and
operating speed of 100 mm/second at the regular cam.)
■ Contact form
This refers to the
components
determining the type
of application which
make up the electrical
input/output circuits in
the contact.
■ Insulation resistance
Resistance between non-continuous terminals, each terminal
and other exposed metal parts and between each terminal and
ground.
■ Dielectric
Threshold limit value that a high voltage can be applied to a
predetermined measuring location for one minute without
causing damage to the insulation.
■ Contact resistance
This indicates the electrical resistance at the contact part.
Generally, this resistance includes the conductor resistance of
the spring and terminal portions.
■ Vibration resistance
Malfunction vibration ... Vibration range where a closed contact
does not open for longer than a specified time due to vibrations
during use of the snap-action switches.
■ Shock resistance
Shock durability ... Shock range where the mechanical shocks
received during snap-action switches transport and installation
do not damage the parts or harm the operating characteristics.
Malfunction shock ... Shock range where a closed contact does
not open for longer than a specified time due to shocks during
use of the snap-action switches.
SPDT
SPST-NC
SPST-NO
Terminal symbols
COM:
NC:
NO:
COM
NC
NC
NO
NO
COM
COM
Common terminal
Normally closed terminal
Normally open terminal
Technical Terminology & Cautions for Use
–2– AECTB36E 201510-T
OPERATING CHARACTERISTIC
TECHNICAL NOTES ON MECHANICAL CHARACTERISTICS
■ Definition of operating characteristic
The main terminological illustrations and
meanings which are used with snap-
action switches are as follows.
Center of mounting holes
FP
OF RF
TT
MD
OT
TTP
OP
PT TF
RP
Classification Terminology Symbol Unit
Varying
display
method
Starting current
Force
Operating
Force OF N Max.
The force required to cause contact snap-action. It
is expressed terms of force applied to the the
actuator.
Release
Force RF N Min.
The force to be applied to the the actuator at the
moment contact snaps back from operated
position to total travel position.
Totaltravel
Force TF N Force applied to an actuator required to move from
an operating position to a total travel position
Movement
Pretravel PT mm,
degree Max. Distance or agree of the actuator movement from
free position to operating position.
Overtravel OT mm,
degree Min.
The distance or degree which the actuator is
permitted to travel after actuation without any
damage to the switching mechanism.
Movement
Differential MD mm,
degree Max. The distance or degree from operating position to
release position of the actuator.
Totaltravel TT mm,
degree
The migration length or the move angle from the
free position to total travel position of actuator
Position
Free
Position FP mm,
degree
Position of the actuator when no force is applied
to.
Operating
Position OP mm,
degree ±The position of the actuator when the traveling
contacts snaps with the fixed contact.
Release
Position RP mm,
degree
The position of the actuator when the traveling
contact snaps back from operating position to its
original position.
Total travel
Position TTP mm,
degree
The stopping position of the actuator after total
travel.
■ Actuation Force and Stroke
Adequate stroke setting is the key to high reliability. It is also
important that adequate contact force be ’maintained to ensure
high reliability. For a normally closed (NC) circuit, the driving
mechanism should be set so that the actuator is normally in the
free position. For a normally open (NO) circuit, the actuator
should be pressed to 70% to 100% of the specified stroke to
absorb possible errors.
If the stroke is set too close to the operating point (OP), this may
cause unstable contact, and in the worst case may cause
actuator damage due to inertia of the drive mechanism. It is
advisable that the stroke be adjusted with the mounting plate or
driving mechanism.
The figure at right
shows a typical
example of activation
and contact forces
varying with stroke.
In the vicinity of the
OP and RP, the
contact force is
diminished, causing
chatter and contact
bounce immediately
before or after
reversal. For this
reason, use the
switch while giving
due consideration to
this. This also causes
the snap action
switch to be sensitive
to vibration or shock.
■ Changes in Operating Characteristics
Exercise design care so that malfunctions will not occur if the
operating characteristics vary by as much as 20% from, rated
values.
<Example>
In the OF max. 0.98N specification for FS snap-action switches,
the allowable max. is 0.98 N × (100%+20%) = 1.18 N
In the RF min. 0.15 N min. specification
the allowable min. 0.15 N × (100%–20%) = 0.12 N
■ Mechanical Conditions for Type Selection
Actuator type should be selected according to activation
method, activation speed, activation rate, and activation
frequency.
1) An extremely slow activation speed may cause unstable
contact transfer, possibly resulting in contact failures or contact
fusion.
2) An extremely high activation speed may cause damage to
contacts or contact response failure.
■ Driving Mechanism
Use of a driving mechanism which will cause physical impact to
the actuator should be avoided.
<Example>
Bad Good
OF
RF
PT
NC
On FP
On reversal
On reversal
On OTP
NO
Stroke
Stroke
MD OT
FP RP OP TTP
Contact force Operating force
Technical Terminology & Cautions for Use
–3– AECTB36E 201510-T
TECHNICAL NOTES ON ELECTRICAL CHARACTERISTICS
CAUTIONS IN A CIRCUIT
1) The snap-action switch is designed for AC operations. While it
has small contact gaps and no arc absorber, it may be used for
low-capacity DC operations.
Please refer to the rating of each products
2) For applications with very small switching voltage or current,
choose the low-level load type (Au contact).
3) When selecting a contact type of a snap-action switch to be
used for low-level load switching, the following should be noted.
Silver contacts’ surfaces are prone to be oxidized and form a
sulfide film. The switch operates with no problems at the
beginning of use. However, as the contact surfaces develop films
with time, the film may not be broken by the switching operation,
causing a conduction failure. Therefore, please choose the Au
contact type for switching a load of 0.1 A or below.
4) Application to Electronic Circuits
• The snap-action switch contacts can sustain bounce or chatter
when closed. Bounce or chatter can cause noise or pulse count
errors when the snap action switch is used in electronic circuits.
• If contact bounce or chatter poses problems in the vicinity of
the OP and RP, use a suitable absorption network, such as a C/
R network.
5) Check the surge current, normal current and surge duration.
6) Contact resistance given in performance specifications is
measured with a voltage drop method using 6 to 8 V DC, 1 A
(except for low-level load type). Contact resistance across COM
and NC terminals is measured in the free position, while contact
resistance across COM and NO terminals is measured in the
total travel position.
7) Ratings are measured under the following conditions:
Inductive load: Power factor 0.6 to 0.7
Time constant: 7 ms or less (DC)
8) To prevent contact welding failure, be sure to use a serial
resistance for each capacitive load.
9) If snap-action switch operation is synchronized with the AC
supply phase, this may cause: shortened electrical life, contact
fusion failure, contact transfer, or other reliability problems.
Small current and voltage application range (Au contact)
500
100
50
5
2
14 8 12 16 20 24
10
DC voltage (VDC)
Current (mA)
1) Contact protection is recommended when snap-action
switches are used in an inductive load circuit.
2) Do not connect the
contacts on individual
switches to different
type or different poles of
the power supply.
Examples of power
supply connections
(connection to different
poles)
Example of wrong
power supply
connection (connection
to different poles of
power supply)
This may lead to mixed
DC and AC.
3) Avoid circuits which
apply voltage between
contacts. (This may lead
to mixed deposition.)
Circuit diagram Cautions for use
Contact for snap-action switch (1) r = more than 10 Ω
(2) In an AC circuit
Impedance of R is to be slightly smaller
than impedance of r and c.
Contact for snap-action switch Can be used for both AC and DC.
Impedance of r is nearly equal to
impedance of R.
C: 0.1 μF
Contact for snap-action switch (1) For DC circuits only.
Contact for snap-action switch Can be used for both AC and DC.
rc R
r
cR
R
diode
R
ZNR
Varistor
PL
Wrong
Solenoid load
Lamp load
PL
Right
Solenoid load
Lamp load
Load connected to same pole
L
Load
L
Load
AC
DC
Wrong
Wrong
L
100V
200V
Technical Terminology & Cautions for Use
–4– AECTB36E 201510-T
MOUNTING STATE AND ENVIRONMENT
■ Checking the insulation distance
After mounting and wiring, check the insulation distance
between terminals and the ground. If the insulation distance is
inadequate, mount insulating material between as required.
■ Fastening the snap-action switch body
See the Section “CAUTIONS FOR USE” for the individual
switch.
■ Position adjustment with effector
1) The effector should be positioned so that direct force is not
applied to the plunger or actuator in its free position. The
operating force to the plunger should only be applied in a
perpendicular direction.
2) Note that the use of the switch as a stopper may cause an
operational problem.
■ Switch installation position
• Basically, the switch should be installed so that the object to
press the switch’s plunger or lever can press it down to 70 to
100% of OT of the switch. When determining the position, the
tolerance of OP (Operating Position) and other factors should be
taken into account.
The following describes the case where the strictest tolerance
conditions are adopted.
• Example: Hinge lever type FS switch
■ Soldering precautions
For manual soldering, lay the terminals flat (horizontal with the
ground) and quickly perform the soldering operation using a
soldering iron with the appropriate heat capacity and the proper
amount of solder. Take care that the flux does not flow into the
switch interior by using a ventilation fan to discharge flux gas
and to prevent contact of the switch body with the soldering iron
tip.
Be careful not to apply force to the lead wires or the terminal
portions immediately after soldering.
The temperature setting and time conditions vary depending on
the product.
See the section “CAUTIONS FOR USE” for each product.
■ Avoid using in a silicon atmosphere
Avoid using organic silicon rubber, adhesives, sealing
compounds, oil, grease, and wires in a silicon atmosphere.
■ Please consult us when using under the following
conditions*:
1) Environments where hydrogen sulfide or other corrosive
gases are present.
2) Environments where gasoline, thinner or other flammable,
explosive gases are present.
3) Dusty environments (for non-seal type snap action switches).
4) The perpendicular operating speed exceeds the allowable
operating speed.
5) Switching between different poles.
6) Use in environments not in the prescribed temperature or
humidity range.
■ Storage precautions
To prevent discoloration due to sulfurization of the terminals
(silver- plated), store the switches in a polyethylene bag or other
suitable airtight container.
(1) When the switch is not pressed
The object to press the lever should not be in contact with
the lever.
For this purpose, the object should be at a distance from
the switch father than the maximum FP (Free Position)
value.
FP max = OP max + PT max = 9.6 + 2.8 = 12.4 mm max
The object should be at a distance of 12.4 mm or more
from the mounting hole.
(2) Depressed position
The plunger/lever should be pressed down to 70% or
more of OT (Over Travel). Therefore, the depressed
position should be calculated based on the minimum
value of OP (Operating Position) and the 70 and 100% of
the OT value.
OP min - 70% of OT = 8.0 - 0.84 = 7.16 mm
OP min - 100% of OT = 8.0 - 1.2 = 6.80 mm
The plunger/lever should be pressed down to the position
of 6.80 to 7.16 mm from the mounting hole.
FP
OP PT
TTP OT
Reference values: OP = 8.8±0.8mm
PT = max. 2.8mm
OT = min. 1.2mm
<Examples> Soldering iron tip
Wrong Correct
Technical Terminology & Cautions for Use
–5– AECTB36E 201510-T
■ Usage, storage, and transport conditions
During usage, storage, or transportation, avoid locations subject
to direct sunlight and maintain normal temperature, humidity,
and pressure conditions.
The allowable specifications for environments suitable for usage,
storage, and transportation are given below.
1) Temperature: The allowable temperature range differs for
each switch, so refer to the switch’s individual specifications. In
addition, when transporting or storing switches while they are
tube packaged, there are cases when the temperature may differ
from the allowable range. In this situation, be sure to consult the
individual specifications.
2) Humidity: 5 to 85% R.H.
3) Pressure: 86 to 106 kPa
The humidity range varies with the temperature. Use within the
range indicated in the graph below.
(The allowable temperature depends on the switch.)
• Condensation will occur inside the switch if there is a sudden
change in ambient temperature when used in an atmosphere of
high temperature and high humidity. This is particularly likely to
happen when being transported by ship, so please be careful of
the atmosphere when shipping. Condensation is the
phenomenon whereby steam condenses to cause water
droplets that adhere to the switch when an atmosphere of high
temperature and humidity rapidly changes from a high to low
temperature or when the switch is quickly moved from a low
humidity location to one of high temperature and humidity.
Please be careful because condensation can cause adverse
conditions such as deterioration of insulation, coil cutoff, and
rust.
• Condensation or other moisture may freeze on the switch when
the temperatures is lower than 0°C 32°F. This causes problems
such as sticking of movable parts or operational time lags.
• The plastic becomes brittle if the switch is exposed to a low
temperature, low humidity environment for long periods of time.
• Storage for extended periods of time (including transportation
periods) at high temperatures or high humidity levels or in
atmospheres with organic gases or sulfide gases may cause a
sulfide film or oxide film to form on the surfaces of the contacts
and/or it may interfere with the functions. Check out the
atmosphere in which the units are to be stored and transported.
• In terms of the packing format used, make every effort to keep
the effects of moisture, organic gases and sulfide gases to the
absolute minimum.
■ We reserve the right to modify without notice the
materials, internal components, and other parts to improve
product quality.
■ Handling precautions
When handling the switches, be careful not to drop them on the
floor since this may damage them.
* Select contact sulfurization (clipping) prevention products (FS and Au-clad double
layer contacts) for use with extremely small loads or an environment-resistant
Turquoise switch.
■ Others
1) Failure modes of switches include short-circuiting, open-
circuiting and temperature rises. If this switch is to be used in
equipment where safety is a prime consideration, examine the
possible effects of these failures on the equipment concerned,
and ensure safety by providing protection circuits or protection
devices. In terms of the systems involved, make provision for
redundancy in the design and take steps to achieve safety
design.
2) The ambient operating temperature (and humidity) range
quoted is the range in which the switch can be operated on a
continuous basis: it does not mean that using the switch within
the rating guarantees the durability performance and
environment withstanding performance of the switch. For details
on the performance guarantee, check the specifications of each
product concerned.
Tolerance range
(Avoid
condensation when
used at temperatures
higher than 0°C32°F)
(Avoid freezing when
used at temperatures
lower than 0°C32°F)
85
5
–40
–40 0
+32 +85
+185
Temperature, °C°F
Humidity, %R.H.
Technical Terminology & Cautions for Use
–6– AECTB36E 201510-T
■ Types of actuators
Shape Classification Pretravel
(PT)
Overtravel
(OT)
Operating
Force
(OF)
Vibration
Shock Features
Pin plunger Small Small Large Out-
standing
Appropriate for linear short-stroke action. Pin plunger acts directly on snap
action mechanism, enabling high-precision positioning. Amount of movement
after operation is smallest among all of the actuators, however, so reliable
stopper is required.
Spring small
plunger Small Medium Large Excellent Used in much the same way as the pin plunger, but is easier to use because
the amount of movement after operation is larger.
Spring short
plunger Small Medium Large Good Pin plunger is short, with large plunger diameter that makes centering easier.
Like small spring plunger, amount of movement after operation is large.
Panel attachment
plunger Small Large Large Good
Secured to panel with hex or lock nut; used as manual or mechanical plunger.
Amount of movement after operation is extremely large and operation point can
be adjusted by changing attachment position. Can be used in combination with
low-speed cam.
Panel attachment
roller plunger Small Large Large Possible This is the panel attachment type with a roller, and can be used with fast-
moving cams and dogs..
Hinge lever Large Medium Small Possible
Little force required for operation. Appropriate for use with low-speed cams and
dogs; has large stroke.
Lever available in various shapes to fit operating unit.
Simulated roller
lever Large Medium Small Possible Tip of hinge lever is bent into a semi-circle, enabling use as a simple roller type.
Leaf lever Large Large Small Excellent Play in lever is used to assure maximum stroke. Construction provides for
space where lever is attached, for outstanding resistance to freezing.
Hinge roller lever Large Medium Small Possible
This is a hinge lever with a roller, and can be used with high-speed cams and
dogs.
The force required for pin plunger action is lighter than that of the lever, and the
stroke is longer.
One way action
hinge roller lever Medium Medium Medium Possible
This is hinge roller lever type, and can operate in relation to an operating unit
from a one way direction, but the roller is bent from the opposite direction and
cannot move.
This can be used to prevent reverse-direction action.
Leaf spring Medium Medium Medium Good
This has a leaf spring with offset yield force and has a large stroke. Ideal for
driving low-speed cams and cylinders. Fulcrum is fixed for high precision. To
prevent leaf damage, movement after operation must be within specified value.
Roller leaf spring Medium Medium Medium Good This is a leaf spring with a roller, and can be used with high-speed cams.
(OC reversed
action groove type)
Reverse-action
hinge lever
Large Small Medium Excellent
This is used for low-speed, low-torque cams.
The lever comes in various shapes to fit the
operating body.
The plunger is constantly
pressed down by a coiled
spring, and operating the
lever induces reverse action.
Because the plunger is
depressed when not
engaged, vibration and shock
resistance are excellent.
Pressing the plunger too far
does not cause abnormal
force to be applied to the
switch mechanism, so a
stable service life is assured.
(OC reversed
action groove type)
Reverse-action
hinge roller lever
Medium Medium Medium Excellent
This is a reverse-action hinge lever with a roller
and is appropriate for cam operation. Excellent
resistance to vibration and impact when not
engaged.
(OC reversed
action groove type)
Reverse-action
hinge roller short
lever
Small Medium Large Excellent
This is a shorter version of the reverse-action
hinge lever with a roller and has a larger action
force, but is appropriate for cam operation with
a short stroke. Excellent resistance to vibration
and impact when not engaged.
Rotating-action
type Large Large Small Possible This is a rotating, light-action type that is ideal for detecting paper, coins, and
similar objects.
