8500 Series Subminiature Pushbutton Switches Features/Benefits Typical Applications A Pre-travel or over-travel models Detection available Telecommunications and Ratings up to 3 AMPS networking equipment Reliable contact design Computers and peripherals RoHS compliant Models Available Specifications Materials CONTACT RATING: Q contact material (853X Models): 1 AMP CASE: Glass filled phenolic or diallyl phthalate (DAP) (UL 94V-0). 120 V AC or 28 V DC (855X Models): 3 AMPS 120 V AC or PLUNGER: Phenolic or glass filled polyester, black standard(UL94V-0). 28 V DC. See page A-65 for additional ratings. CAP & FRAME: Nylon, black, standard. ELECTRICAL LIFE: BUSHING: Brass, nickel plated. 853X MODELS: 250,000 actuations at full load. 855X MODELS: 10,000 actuations at full load. CONTACTS: Q contact material: Coin silver, silver plated. See page A-65 for additional contact materials. CONTACT RESISTANCE: Below 30 m typ. initial 2-4 V DC, 100 mA, for both silver and gold plated contacts. TERMINALS: Q contact material: Copper alloy, silver plated. See page 9 A-65 for additional contact materials. INSULATION RESISTANCE: 10 min. TERMINAL SEAL: Epoxy. DIELECTRIC STRENGTH: 1,000 Vrms min. sea level. HARDWARE: Nut: Brass, nickel plated Lockwasher: Steel, bright OPERATING TEMPERATURE: 30C to 65C. nickel plated. TORQUE SPECS: T, T1 15/32 bushings - 50 in. lbs max. All other 1/4 -40 bushing types 12 in. lbs max. NOTE: Any models supplied with Q, B or G 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. 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-63 thru A-66. For additional options not shown in catalog, consult Customer Service Center. All models have epoxy terminal seal and are compatible with all bottom-wash PCB cleaning methods. Switch Function 8531 SPST Off-Mom. 1 Amp 8532 SPST Off-Mom. 1 Amp 8533 SPST On-Mom. 1 Amp 8534 SPST On-Mom. 1 Amp 8551 SPST Off-Mom. 3 Amps 8552 SPST Off-Mom. 3 Amps Actuator or Plunger M .150 high J81 Snap-in with frame J82 Snap-in with frame for LED Terminations S .210 high Z Solder lug T 15/32 bushing AV* Right angle, PC thru-hole T1 15/32 bushing with frame C PC Thru-hole (8532 and 8534 only) Contact Material Q Silver B Gold Seal G Gold over silver E Epoxy D No epoxy seal Cap or Plunger Color * Available with M or S plunger models, and B contact material only. 2 Black 1 White 3 Red Frame Color 9 Gray 2 Black NONE Models without frame Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ckswitches.com A-62 PushbuttonPushbutton 8500 Series Subminiature Pushbutton Switches SWITCH FUNCTION A SWITCH FUNCTION POS. 1 POS. 2 NO. MODEL ACTUATION POLES NO. RATING TOTAL TRAVEL FORCE SCHEMATIC 8531 1 AMP with overtravel SP OFF MOM095 (2,41) TYP. 7.7 oz (220g) TYP. N.O. with overtravel .042 (1,07) TYP. 8551 3 AMPS SPST Part number shown: 8531MZQE2 8532 1 AMP SP OFF MOM050 (1,27) TYP. 6 oz (170g) TYP. N.O. 8552 3 AMPS SPST Part number shown: 8532MZQE2 with pretravel 8533 1 AMP ON MOM080 (2,03) TYP. 11.5 oz (456 g) TYP. N.C. with pretravel .057 (1,45) TYP. SP with overtravel 8534 1 AMP ON MOM032 (0,81) TYP. 10.3 oz (282g) TYP. N.C. with overtravel .028 (0,71) TYP. SPST Part number shown: 8533MZQE2 MOM. = Momentary All models with all options when ordered with G or Q contact material. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ckswitches.com A-63