A-67
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
Pushbutton
A
KM Series
Subminiature Pushbutton Switches
Features/Benefits
•Reliable contact design
•Available with pretravel
and overtravel
•Extended overtravel option
•RoHS compliant
Typical Applications
•Alarm systems
•Computers
•Detector switch application
Specifications
CONTACT RATING: Q contact material (KM11, KM12 Models):
0.25 AMPS @ 125 V AC or DC (UL); (KM33 Model): 1 AMP @
125 V AC or 28 V DC. See page A-69 for additional ratings.
ELECTRICAL LIFE: 10,000 actuations min. at full load.
CONTACT RESISTANCE: Below 30 mΩtyp. initial @ 2-4 V DC,
100 mA, for both silver and gold plated contacts.
INSULATION RESISTANCE: 109Ωmin.
DIELECTRIC STRENGTH: 1,000 Vrms min. @ sea level.
OPERATING TEMPERATURE: –30ºC to 85ºC.
CAP INSTALLATION FORCE: 10 lbs. max. permissible.
NOTE: Any models supplied with Q or B contact material are RoHS compliant.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
Materials
HOUSING & BUSHING: 6/6 nylon (UL94V-2), black.
ACTUATOR: 6/6 nylon (UL 94V-2), natural. Internal o-ring seal,
available on KM11 & KM33 models.
MOVABLE CONTACT: B contact material: Bronze or copper,
with gold plate over nickel plate. See page A-69 for
additional contact materials.
STATIONARY CONTACTS & TERMINALS: B contact material:
Copper, with gold plate over nickel plate. See page A-69 for
additional contact materials.
RETURN SPRING: Music wire, phosphor coated.
MOUNTING NUT: Brass, nickel plated.
TERMINAL SEAL: Epoxy.
Build-A-Switch
To order, simply select desired option from each category and place in the appropriate box. Available options are shown
and described on pages A-68 and A-70. For additional options not shown in catalog, consult Customer Service Center.
Switch Function
KM12 On-Mom., SPDT
KM11 Off-Mom., SPST, N.O.
KM33 On-Mom., SPST, N.C.
Actuator
02 .398" high, .122" dia. KM12
01 .122" dia. KM11,
Stepped, .108” dia. KM33
Contact Material
BGold
QSilver
Seal
NONE No seal
EEpoxy
Bushing/Mounting Style
ARight angle
RR 1/4-40 thread, .225" high
Models Available
Terminations
05 .110" quick connect
08 Right angle, PC thru-hole
02 PC Thru-hole
A-68
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
A
Pushbutton
Third Angle
Projection
KM Series
Subminiature Pushbutton Switches
SWITCH FUNCTION
ACTUATOR
SPDT
4-32-1MOM.ON
KM12
SP
SPST N.O.
SPST N.C.
2-1
OPEN
OPEN
2-1
MOM.
MOM.
OFF
ON
KM11
KM33
SP
SCHEMATIC
CONNECTED TERMINALS
POS. 1 POS. 2
SWITCH FUNCTION
POS. 1 POS. 2
MODEL NO.NO. POLES
SPDT
SPST
Part number shown: KM1202A08BE
Part number shown: KM1101RR05BE
02
.398" HIGH, .122" DIA.
01
.122" DIA.
KM12 models only.
NOTE: Caps available for plunger options, see page A-70.
KM11 models only. KM33 models only.
A-69
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
Pushbutton
A
Third Angle
Projection
KM Series
Subminiature Pushbutton Switches
BUSHING/ MOUNTING STYLE
TERMINATIONS
CONTACT MATERIAL
SEAL
PANEL MOUNTING
PC MOUNTING
08
RIGHT ANGLE, PC THRU-HOLE
A
RIGHT ANGLE
E
EPOXY SEAL
NONE
NO SEAL
05
.110" QUICK CONNECT
02
PC THRU-HOLE
RR
1/4-40 THREAD, .225" HIGH
KM11 & KM33 models only.KM12 models only.
KM12 models only.
KM12 models only.
KM11 models only.
KM11 models only.
KM11 & KM33 models.
* Note: See Technical Data section of this catalog for RoHS compliant and compatible definitions and specifications.
1
STATIONARY CONTACTS & TERMINALS: Copper, with gold plate over nickel plate.
MOVABLE CONTACT: Phosphor bronze or beryllium copper, with gold plate over
nickel plate.
2
STATIONARY CONTACTS & TERMINALS: Copper, silver plated (standard with all
termination options).
MOVABLE CONTACT: Phosphor bronze or beryllium copper, silver plated.
3
STATIONARY CONTACTS & TERMINALS: Copper, with gold plate over nickel plate
over silver plate.
MOVABLE CONTACT: Phosphor bronze or beryllium copper, with gold plate over
nickel plate over silver plate.
NOTE: Any models supplied with Q or B contact material are RoHS compliant.
KM11, KM12 models when ordered with ‘Q’ contact material.
YES
YES
YES
YES
RoHS
COMPLIANT * RoHS
COMPATIBLE * RATINGSCONTACT AND TERMINAL MATERIAL
OPTION
CODE
B
Q
GOLD
1
SILVER
2
POWER
LOW LEVEL/DRY CIRCUIT 0.4 VA MAX. @ 20 V AC OR DC MAX.
0.25 AMPS @ 125 V AC OR DC (KM11, KM12) (UL)
1 AMP @ 125 V AC OR 28 V DC (KM33).
A-70
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ck-components.com
A
Pushbutton
KM Series
Subminiature Pushbutton Switches
AVAILABLE HARDWARE
.187
(4,75)
.081
(2,03)
.245 DIA.
(6,22 )
.200 DIA.
(5,08 )
.120
(3,05)
.155
(3,94)
.375 DIA.
(9,53 )
.120
(3,05)
.250
(6,35)
.310 DIA.
(7,87 )
.250
(6,35)
.138
(3,51)
Cap, KM33 models
PART NO.
785101000
WHITE
785102000
BLACK
785103000
RED
Material: Nylon
Finish: Gloss
Cap, KM11 models
PART NO.
708901000
WHITE
708902000
BLACK
708903000
RED
Material: Nylon
Finish: Gloss
Cap, KM11 models
PART NO.
752701000
WHITE
752702000
BLACK
752703000
RED
Material: Nylon
Finish: Gloss
Cap, KM11 models
PART NO.
801801000
WHITE
801802000
BLACK
801803000
RED
Material: Nylon
Finish: Gloss
Cap, KM11 models
PART NO.
484601000
WHITE
484602000
BLACK
484603000
RED
Material: Nylon
Finish: Gloss
PART NO.
798201000
WHITE
798202263
BLACK
798203000
RED
Material: Nylon
Finish: Matte
NOTE: Other cap colors available, consult Customer Service Center.
.450 SQ.
(11,43)
.195
(4,95) .240
(6,10)
Third Angle
Projection
