Pushbutton 8020 Series Snap-acting Momentary Pushbutton Switches Features/Benefits Typical Applications A Positive tactile feel Instrumentation Multi-positions available Computer peripherals Wide variety of termination options Telecommunications equipment Epoxy terminal seal compatible with bottom wash cleaning RoHS compliant models available Models Available Specifications Materials CONTACT RATING: B contact material (8X25 Models): 0.4 VA max. CASE: Glass filled nylon 6/6 or diallyl phthalate (DAP), 20 V AC or DC maximum. G contact material (8X21, U8X1 flame retardant (UL 94V-0). Models): 1 AMP 120 V AC or 28 V DC or 0.4 VA max. 20 V PLUNGER: Glass filled nylon or glass filled polyester (PBT) (UL 94V-0). AC or DC max. Note: Break-before-makecontacts. Multi-pole contacts do not make and break simultaneously. See page A-43 CAP & FRAME: Nylon, black, standard. for additional ratings. BUSHING: Brass or zinc, nickel plated. ELECTRICAL LIFE: 60,000 make-and-break cycles at full load. HOUSING: Stainless steel. CONTACT RESISTANCE: Below 50 m typ. initial 2-4 V DC, 100 mA, for both silver and gold plated contacts. SWITCH SUPPORT: Brass or steel, matte-tin plated. 9 INSULATION RESISTANCE: 10 min. N.O. & N.C. CONTACTS: 8X21, U8X1 MODELS: G contact material: Coin silver, with gold plate over nickel plate. See page A-43 for DIELECTRIC STRENGTH: 1,000 Vrms min. sea level. additional contact materials. OPERATING TEMPERATURE: 8X2X MODELS: 30C to 75C. 8X25 MODELS: B contact material: Copper alloy, with gold plate U8X1 MODELS: 30C to 65C. over nickel plate. See page A-43 for additional contact materials. CAP INSTALLATION FORCE: 10 lbs. max. permissible. COMMON CONTACT & ALL TERMINALS: Copper alloy, with gold SOLDERABILITY: Per MIL-STD-202F method 208D, or EIA RS-186E plate over nickel plate. method 9 (1 hour steam aging). TERMINAL SEAL: Epoxy. Refer to soldering and cleaning NOTE: Any models supplied with B, P, R, or G contact material are RoHS compliant. Technical Data Chapter. NOTE: Specifications and materials listed above are for switches with standard options. HARDWARE: Nut & Locking Ring: Brass, nickel plated For information on specific and custom switches, consult Customer Service Center. Lockwasher: Steel, nickel plated. 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-30 thru A-45. 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 Bushing Contact Material 8121 SPDT On-Mom. 1 Amp D9 .280 high, keyway B Gold Frame Color 8125 SPDT On-Mom. 0.4VA H .250 high, flat 2 Black P Gold, matte-tin Actuator or Plunger 8221 DPDT On-Mom. 1 Amp NONE No bushing G Gold over silver NONE Models S Plunger 8225 DPDT On-Mom. 0.4VA choice required without frame R Gold over silver, NONE Snap-in 8321 3PDT On-Mom. 1 Amp D .280 high, keyway matte-tin 1 White J80 Snap-in 8325 3PDT On-Mom. 0.4VA D2 .288 high, flat 3 Red J81 Snap-in w/frame 8421 4PDT On-Mom. 1 Amp D3 .180 high 5 Yellow J82 Snap-in w/frame for LED 8425 4PDT On-Mom. 0.4VA D8 .288 high, flat 6 Green Seal J83 Snap-in w/frame & H9 .250 high, flat, hi torque 9 Gray E Epoxy Note: UL/CSA models flush cap Y .350 high, keyway I Epoxy potted available, see page A-30 J84 Snap-in w/frame for LED, LED Color Y3 6.35mm high, and A-31. base flush cap Cap Color 3 Red keyway, hi torque J85 Snap-in w/frame & LED NONE Models 2 Black 4 Orange Y4 .378 high, flat, hi torque J95 PC w/V-bracket & LED NONE Models 5 Yellow without LED Y9 .350 high, keyway L Plunger without caps 6 Green 5 Yellow M Snap-fitting plunger 6 Green 1 White 7 Blue 3 Red 9 Gray Terminations A4 Right angle, PC thru-hole, reversed terminals V2 .555 high, V-bracket V31 .460 high, snap-in V-bracket A Right angle, PC thru-hole A6 Right angle, PC thru-hole V3 .460 high, V-bracket V61 .460 high, snap-in V-bracket AV2 Vertical right angle, PC thru-hole AV Vertical right angle, PC thru-hole V4 .630 high, V-bracket W .750 long, wire wrap C PC Thru-hole AV1 Vertical right angle, PC thru-hole V6 .460 high, V-bracket W1 .964 long, wire wrap Z Solder lug AV3 Vertical right angle, snap-in, PC thru-hole V7 .630 high, V-bracket W3 .425 long, wire wrap A2 Right angle, PC thru-hole R Right angle with PCB V8 .953 high, V-bracket W4 1.062 long, wire wrap A3 Right angle, snap-in, PC thru-hole R2 Right angle with PCB, reversed terminals V9 1.150 high, V-bracket Z3 Quick connect Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ck-components.com A-298020 Series Snap-acting Momentary Pushbutton Switches SWITCH FUNCTION A SWITCH FUNCTION CONNECTED TERMINALS POS. 1 POS. 2 POS. 1 POS. 2 UL/CSA* NO. MODEL C&K marking on C&K marking on POLES MODEL NO. NO. opposite side opposite side SCHEMATIC 8121 U811 ON MOM. SP 1-3 1-2 8125 ON MOM. SPDT SPDT Terminal Nos. Part number shown: 8121SHZGE For Reference Only 8221 U821 ON MOM. DP 1-3,4-6 1-2,4-5 8225 ON MOM. DPDT DPDT Part number shown: 8221SHZGE Terminal Nos. For Reference Only 8321 U831 ON MOM. 3P 1-3,4-6,7-9 1-2,4-5,7-8 8325 ON MOM. 3PDT 3PDT Terminal Nos. Part number shown: 8321SHZGE For Reference Only MOM. = Momentary 8X25 models must be ordered with B or P contact material. 8X21 and U8X1 models must be ordered with G or R contact material. *U811 thru U841 model numbers with all options (except R, R2 terminations) when ordered with G or R contact material. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ck-components.com A-30 Pushbutton