KM Series
Subminiature Pushbutton Switches
Features/Benefits
•
Reliable contact design
•
Available with pretravel
and overtravel
Typical Applications
•
Alarm systems
•
Computers
•
Detector switch application
A
Pushbutton
•
RoHS compliant
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: 109
Ω
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.ck-components.com
KM Series
Subminiature Pushbutton Switches
BUSHING/ MOUNTING STYLE
A
RIGHT ANGLE
A
1/4-40 THREAD, .225" HIGH
RR
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
RoHS
COMPATIBLE *
YES
CONTACT AND TERMINAL MATERIAL
RATINGS
B
Q
GOLD
1
SILVER
2
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).
YES
YES
POWER
* 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.
SEAL
NONE
NO SEAL
E
EPOXY SEAL
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
A-69
www.ck-components.com
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