AHF2
144
TIP (AHF2)
SWITCHES
SMALL, HIGHLY
RELIABLE TIP SENSOR
CONTAINING A PHOTO
SENSOR
FEATURES
• Realizes miniaturization of equipment
and spaces saving. Size of body:
9.5
×
9.5
×
9.3 mm .374
×
.374
×
.366 inch
• The contact type is equivalent to normal-
ly closed contacts, which satisfies the PL
Act.
• The internal sphere can be used over an
operation angle of 360 degrees in the cir-
cumferential direction.
• There are three standard terminal pro-
files which can be selected according to
the mounting direction of the PCB.
• The terminals are tin-plated for long-
term solderability.
TYPICAL
APPLICATIONS
• Gas heaters
• Electric fans
• Water vallet
• Infrared treatment device
• Electric pots with warming function
ORDERING INFORMATION
Remark: Standard Packaging: Tube 50 pcs.
Mounting direction Vertical mounting Horizontal mounting Reverse mounting
Part No. AHF21 AHF22 AHF23
PCB mounting condition
CONTACT TYPE
Normally closed type (The photo transistor is ON when the sen-
sor is being used.)
APPLICABLE CIRCUIT
Refer to the dimensional diagram for the terminal Nos.
• V
CC
= 5 V
• R
2
= 100 k
Ω
• Forward current,
I
F
, of the LED: 19 mA
(V
CC
= 5 V, R
1
= 200
Ω
)
• Forward voltage,
V
F
, of the LED: Typ = 1.2 V
BASIC CHARACTERISTICS
For T
a
= 25
°
C 77°F and applicable circuit conditions
1) Operation characteristics (Operation speed 6 degrees/second)
• Operation angle (Output: V
OL
→
V
OH
): 25 to 60 degrees
• Return angle (Output: V
OH
→
V
OL
): Min. 20 degrees
2) Output (V
O
) characteristics (The sphere must be stationary.)
• V
OL
(photo transistor ON): Max. 1.0 V (horizontal)
• V
OH
(photo transistor OFF): Min. 4.0 V (inclined at an angle of at
least 60 degrees)
Terminal No. 1
Terminal No. 4
Tip switch
Terminal No. 2
Terminal No. 3
VCC
VO
R2
R1
IF
(VCC)
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AHF2
145
SPECIFICATIONS
Notes:
1.Without any indications, specifications are measured at following conditions
• Temperature: 15 to 35
°
C 59 to 95°F
• Humidity: 25 to 85% RH
• Atmospheric pressure: 86 to 106 kpa.
2.The evaluation criteria for performance are as follows:
Basic characteristics – T
a
= 25
°
C 77°F and applicable circuit conditions
1) Operation characteristics (operation speed 6 degrees/sec.)
• Operation angle (Output: V
OL
→
V
OH
): 25 to 60 degrees
• Return angle (Output: V
OH
→
V
OL
): 20 degrees min.
2) Output (V
O
) characteristics (The sphere must be stationary.)
• V
OL
(photo transistor ON): 1.2 V max. (horizontal)
• V
OH
(photo transistor OFF): 3.8 V min. (inclined at an angle of at least 60 degrees)
Item Specificaitons
Electrical and mechanical life
Min. 10
5
(Using the applicable circuit)
At 6 cpm; Opening and closing position: 0 deg.
↔
90 deg. (The internal shpere must be stationary for at least
500 ms at angles of 0 and 90 deg. respectively.)
Vibration resistance 10 to 400 Hz acceleration 2.9 m/s
2
applied for 7 days
5 to 10 Hz at half amplitude of 5 mm, 5
×
10
5
cycles
Shock resistance 588 m/s
2
applied 3 times in each of 6 directions
Terminal strength Min. 9.8 N (each direction)
Dropping individual part Three times from height of 100 cm
High temperature, high humidity
storage ability
Leave for 500 hours at 85
°
C 185°F and 85% RH
(No freezing at low temperature)
High temperature storage ability Leave for 500 hours at 85
°
C 185°F
Low temperature storage ability Leave for 500 hours at –25
°
C –13°F
(No freezing at low temperature)
Shock and heat resistance Subject to 100 cycles each consisting of 30 minutes at –25
°
C –13
°
F and 30 minutes at 85
°
C 185°F.
Resistance to hydrogen sulfide Leave for 500 hours in an atmosphere containing 3 ppm of hydrogen sulfide at 40
°
C 104°F and 75% RH.
Resistance to sulfur dioxide gas Leave for 500 hours in an atmosphere containing 10 ppm of sulfur dioxide at 40
°
C 104°F and 95% RH
Resistance to ammonia gas Leave for 96 hours in an atmosphere containing 3% of ammonia gas at normal temperature and humidity.
Resistance to dust Mix with 2 kg/m
3
talcum powder or fly ash and leave to stand for 8 hours
Ambient temperature –20 to +80
°
C –4 to +176°F
(No freezing nor condensation at low temperature)
DIMENSIONS
• Horizontal mounting type
Terminal No. 1
(LED: Anode)
Terminal No. 4
(Photo transistor: Emitter)
PC
board
Horizontal
datum line
Horizontal
datum line
Terminal No. 3
(Photo transistor: Collector)
Terminal No. 2
(LED: Cathode)
6.55
.258
1.7 5
.069
9.3
.366
3.7
.146
0.9
.035
4.0
.157
3.1
.122
5.1
.201
9.5
.374
3.0
.118 2.6
.102
9.5 dia.
.374 dia.
C0.3
.012
C0.3
.012
7.9
.311
9.5
.374
11.5
.453
mm inch
PC board pattern (Bottom view)
Terminal No. 1
(LED: Anode) Terminal No. 2
(LED: Cathode)
Terminal No. 4
(Photo transistor: Emitter)
1.3 dia.
.051 dia.
Terminal No. 3
(Photo transistor:
Collector)
3.1±0.1
.122±.004
11.9±0.1
.469±.004
5.1±0.1
.201±.004
• Vertical mounting type
5.1±0.4
.201±.016 0.9
.035
2.6
.102
3.1±0.4
.122±.016
Terminal No. 1 Terminal No. 2
Terminal No. 4 Terminal No. 3
11.5±0.5
.453±.020
PC board
PC board pattern (Bottom view)
Terminal No. 4
(Photo transistor: Emitter)
Terminal No. 2
(LED: Cathode)
Terminal No. 3
(Photo transistor:
Collector)
Terminal No. 1
(LED: Anode)
5.1±0.1
.201±.004
11.9±0.1
.469±.004
3.1±0.1
.122±.004
1.3 dia.
.051 dia.
AHF2
146
• Reverse mounting type
Terminal No. 1
Terminal No. 4
Terminal No. 2
Terminal No. 3 5.1±0.5
.201±.020
3.1±0.5
.122±.020
11.5±0.7
.453±.028
2.6
.102 0.9
.035
PC board
11.9
.469
mm inch
PC board pattern (Bottom view) [Internal circuit and applicable circuit]
Terminal No. 4
(Photo transistor: Emitter)
Terminal No. 2
(LED: Cathode)
Terminal No. 3
(Photo transistor: Collector)
Terminal No. 1
(LED: Anode)
11.9±0.1
.469±.004
3.1±0.1
.122±.004 5.1±0.1
.201±.004
1.3 dia.
.051 dia.
Terminal No. 1
Terminal No. 4
Tip switch
Terminal No. 2
Terminal No. 3
VCC
VO
R2
R1
IF
(VCC)
NOTES
1. Handling
1) In the enent that a voltage or current
that exceeds the maximum rating is ap-
plied to, or passed between the terminals,
the photo-transistor will no longer function
normally. In such a case, do not reuse the
photo-transistor but discard it.
2) Be careful not to apply an excessively
large load to the terminals because this
may damage the photo-transistor.
2. Soldering
1) When soldering by hand, use a 18W
soldering iron that has a temperature reg-
ulator (iron tip temperature must be no
more than 350
°
C 662°F) and apply the tip
to the joint for no more than 3 seconds.
2) When performing automatic soldering,
ensure that the board does not remain in
the solder bath for more than 10 seconds
at 260
°
C 500°F, or more than 3 seconds
at 350
°
C 662°F.
3) Be careful not to move the terminals for
one minute after soldering them.
3. Environment
This product is a non-contact type tip de-
tection switch containing a photo-inter-
rupter. It is intended for installation in
equipment. Because of the nature of a
semiconductor, if this product is used con-
tinuously for a long period in a high tem-
perature, low temperature and/or humid
environment, according to the optic quan-
tities decrease of luminescent diode out-
put characteristics may be significantly
affected. In such a case, take suitable
measures, such as inserting a compara-
tor at the output side, to provide a greater
degree of margin with respect to change
in the output characteristics, and thereby
improve the reliability of the product.
4. Preventing a malfunction
1) The tip sensor uses an internal sphere,
hence chattering occurs if it is subjected
to vibration or shock. To prevent chatter-
ing, continuously read pulses of 30 ms
max. using a microprocessor, and set the
microprocessor so that the switch goes L
(ON) or H (OFF) if the output level ex-
ceeds 500 ms continuously. Also, take
steps to keep induction and RF noise
away from the sensor.
2) The switch should be mounted keeping
away from the vibration generator such as
motor. Fix the PC board firmly in order to
prevent resonance with the vibration gen-
erator, or the contact chattering of a
switch may occur by the movement of a
ball inside. The allowable vibration level
which the chattering does not occur would
be less than {0.3G} at 10 to 260Hz and
320 to 400Hz. The range 260 to 320Hz
may have a resonance point and the level
should be less than 0.1G.
5. Others
1) Depending on the circuitry and the en-
vironmental conditions, solder migration
may occur and short a circuit. Please con-
firm that the insulation distance is large
enough in the actual application.
2) To prevent a malfunction, the switch
should be kept away from the direct sun-
light and any other light sources.
3) The noises caused by electrostatics,
surge voltage and inductives may break
the photo-interruptor.
4) The reflow soldering and cleaning are
not allowed.
5) The switch should be mounted with the
tolerance
±
3 degree.
6. Confirmations in the actual use.
Each items in this spec sheet was tested
and confirmed independently at a certain
duration. To get a higher reliability of the
equipment, please confirm the switch
quality with the actual load and environ-
mental conditions before using.
Output of Tip switch
Max. 30 ms
continuous H for 500 ms or more
Judgement of switch
OFF state
Transistor OFF
Transistor ON
