KM Series Subminiature Pushbutton Switches Features/Benefits Typical Applications A • Reliable contact design • Alarm systems • Available with pretravel • Computers P u and overtravel • Detector switch application s • RoHS compliant h b u t t o n Models Available Specifications Materials CONTACT RATING: Q contact material (KM11, KM12 Models): HOUSING & BUSHING: 6/6 nylon (UL94V-2), black. 0.25 AMPS @ 125 V AC or DC (UL); (KM33 Model): 1 AMP @ ACTUATOR: 6/6 nylon (UL 94V-2), natural. Internal o-ring seal, 125 V AC or 28 V DC. See page A-69 for additional ratings. available on KM11 & KM33 models. ELECTRICAL LIFE: 10,000 actuations min. at full load. MOVABLE CONTACT: B contact material: Bronze or copper, CONTACT RESISTANCE: Below 30 mΩ typ. initial @ 2-4 V DC, with gold plate over nickel plate. See page A-69 for 100 mA, for both silver and gold plated contacts. additional contact materials. INSULATION RESISTANCE: 109Ω min. STATIONARY CONTACTS & TERMINALS: B contact material: DIELECTRIC STRENGTH: 1,000 Vrms min. @ sea level. Copper, with gold plate over nickel plate. See page A-69 for additional contact materials. OPERATING TEMPERATURE: –30ºC to 85ºC. RETURN SPRING: Music wire, phosphor coated. CAP INSTALLATION FORCE: 10 lbs. max. permissible. MOUNTING NUT: Brass, nickel plated. NOTE: Any models supplied with Q or B contact material are RoHS compliant. TERMINAL SEAL: Epoxy. NOTE: Specifications and materials listed above are for switches with standard options. For information on specific and custom switches, consult Customer Service Center. 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 www.ckswitches.com A-67

KM Series Subminiature Pushbutton Switches SWITCH FUNCTION A n SWITCH FUNCTION CONNECTED TERMINALS o POS. 1 POS. 2 POS. 1 POS. 2 t t u b h s NO. POLES MODEL NO. SCHEMATIC u P KM11 OFF MOM. OPEN 2-1 SPST N.O. SP KM33 ON MOM. 2-1 OPEN SPST N.C. SPST Part number shown: KM1101RR05BE SP KM12 ON MOM. 2-1 4-3 SPDT SPDT Part number shown: KM1202A08BE ACTUATOR 02 01 .398” HIGH, .122” DIA. .122” DIA. KM12 models only. KM11 models only. KM33 models only. Third Angle NOTE: Caps available for plunger options, see page A-70. Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ckswitches.com A-68

KM Series Subminiature Pushbutton Switches BUSHING/ MOUNTING STYLE A A RR RIGHT ANGLE 1/4-40 THREAD, .225” HIGH P u s h b u t t o n KM12 models only. KM11 & KM33 models only. PANEL MOUNTING PC MOUNTING KM11 & KM33 models. KM11 models only. KM12 models only. TERMINATIONS 05 08 02 .110” QUICK CONNECT RIGHT ANGLE, PC THRU-HOLE PC THRU-HOLE KM12 models only. KM11 models only. CONTACT MATERIAL OPTION RoHS RoHS CONTACT AND TERMINAL MATERIAL RATINGS CODE COMPLIANT * COMPATIBLE * B YES YES GOLD 1 LOW LEVEL/DRY CIRCUIT 0.4 VA MAX. @ 20 V AC OR DC MAX. Q YES YES SILVER 2 POWER 0.25 AMPS @ 125 V AC OR DC (KM11, KM12) (UL) 1 AMP @ 125 V AC OR 28 V DC (KM33). * Note: See Technical Data section of this catalog for RoHS compliant and compatible definitions and specifications. 1 S TATIONARY CONTACTS & TERMINALS: Copper, with gold plate over nickel plate. NOTE: Any models supplied with Q or B contact material are RoHS compliant. MOVABLE CONTACT: Phosphor bronze or beryllium copper, with gold plate over nickel plate. KM11, KM12 models when ordered with ‘Q’ contact material. 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 E NO SEAL EPOXY SEAL Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ckswitches.com A-69

KM Series Subminiature Pushbutton Switches AVAILABLE HARDWARE A Cap, KM33 models Cap, KM11 and KM12 models Cap, KM11 and KM12 models n o t t u shb .(264,252 D )IA. .187 .120 .(250,008 D )IA. .(397,553 D )IA. (4,75) u (3,05) .250 P (6,35) .081 .155 .120 (2,03) (3,94) (3,05) PART NO. PART NO. PART NO. 785101000 WHITE 708901000 WHITE 752701000 WHITE 785102000 BLACK 708902000 BLACK 752702000 BLACK 785103000 RED 708903000 RED 752703000 RED Material: Nylon Material: Nylon Material: Nylon Finish: Gloss Finish: Gloss Finish: Gloss Cap, KM11 and KM12 models Cap, KM11 models .310 DIA. .450 SQ. (7,87 ) (11,43) .195 .138 (4,95) (3,51) .240 (6,10) .250 PART NO. (6,35) PART NO. PART NO. 801801000 WHITE 484601000 WHITE 798201000 WHITE 801802000 BLACK 484602000 BLACK 798202263 BLACK 801803000 RED 484603000 RED 798203000 RED Material: Nylon Material: Nylon Material: Nylon Finish: Gloss Finish: Gloss Finish: Matte NOTE: Other cap colors available, consult Customer Service Center. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ckswitches.com A-70