Pushbutton KM Series Subminiature Pushbutton Switches Features/Benefits Typical Applications A Reliable contact design Alarm systems Available with pretravel Computers and overtravel Detector switch application RoHS compliant 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 m 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. 9 INSULATION RESISTANCE: 10 min. STATIONARY CONTACTS & TERMINALS: B contact material: Copper, with gold plate over nickel plate. See page A-69 for DIELECTRIC STRENGTH: 1,000 Vrms min. sea level. additional contact materials. OPERATING TEMPERATURE: 30C to 85C. 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-67KM Series Subminiature Pushbutton Switches SWITCH FUNCTION A SWITCH FUNCTION CONNECTED TERMINALS POS. 1 POS. 2 POS. 1 POS. 2 NO. POLES MODEL NO. SCHEMATIC 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 .398 HIGH, .122 DIA. 01 .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 Pushbutton