KM Series
Subminiature Pushbutton Switches
Features/Benefits
•
Reliable contact design
•
Available with pretravel
and overtravel
•
RoHS compliant
Typical Applications
•
Alarm systems
•
Computers
•
Detector switch application
A
Pushbutton
Models Available
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 mΩ typ. initial @ 2-4 V DC,
100 mA, for both silver and gold plated contacts.
INSULATION RESISTANCE: 109Ω min.
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
Bushing/Mounting Style
A
Right angle
RR
1/4-40 thread, .225” high
Terminations
05
.110” quick connect
08
Right angle, PC thru-hole
02
PC Thru-hole
Contact Material
B
Gold
Q
Silver
Seal
NONE
No seal
E
Epoxy
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-67
www.ckswitches.com
KM Series
Subminiature Pushbutton Switches
BUSHING/ MOUNTING STYLE
A
RIGHT ANGLE
RR
A
1/4-40 THREAD, .225” HIGH
Pushbutton
KM12 models only.
PANEL MOUNTING
KM11 & KM33 models only.
PC MOUNTING
KM11 & KM33 models.
KM11 models only.
KM12 models only.
TERMINATIONS
05
.110” QUICK CONNECT
08
RIGHT ANGLE, PC THRU-HOLE
02
PC THRU-HOLE
KM12 models only.
KM11 models only.
CONTACT MATERIAL
OPTION
CODE
RoHS
COMPLIANT *
YES
YES
RoHS
COMPATIBLE *
YES
YES
CONTACT AND TERMINAL MATERIAL
GOLD
1
RATINGS
B
Q
LOW LEVEL/DRY CIRCUIT
POWER
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).
SILVER
2
* 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.
NOTE:
Any models supplied with Q or B contact material are RoHS compliant.
KM11, KM12 models
when ordered with ‘Q’ contact material.
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.
SEAL
NONE
NO SEAL
E
EPOXY SEAL
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-69
www.ckswitches.com
KM Series
Subminiature Pushbutton Switches
A
AVAILABLE HARDWARE
Cap, KM33 models
Cap, KM11 and KM12 models
Cap, KM11 and KM12 models
Pushbutton
.245 DIA.
(6,22 )
.187
(4,75)
.120
(3,05)
.200 DIA.
(5,08 )
.375 DIA.
(9,53 )
.250
(6,35)
.081
(2,03)
.155
(3,94)
.120
(3,05)
PART NO.
PART NO.
WHITE
BLACK
RED
PART NO.
WHITE
BLACK
RED
785101000
785102000
785103000
Material: Nylon
Finish: Gloss
708901000
708902000
708903000
Material: Nylon
Finish: Gloss
752701000
752702000
752703000
Material: Nylon
Finish: Gloss
WHITE
BLACK
RED
Cap, KM11 and KM12 models
Cap, KM11 models
.310 DIA.
(7,87 )
.138
(3,51)
.250
(6,35)
WHITE
BLACK
RED
.450 SQ.
(11,43)
.195
(4,95)
.240
(6,10)
PART NO.
WHITE
BLACK
RED
PART NO.
PART NO.
801801000
801802000
801803000
Material: Nylon
Finish: Gloss
484601000
484602000
484603000
Material: Nylon
Finish: Gloss
798201000
798202263
798203000
Material: Nylon
Finish: Matte
WHITE
BLACK
RED
NOTE:
Other cap colors available, consult Customer Service Center.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-70
www.ckswitches.com