Pushbutton E020 Series Sealed Snap-acting Momentary Pushbutton Switches Features/Benefits Typical Applications A Process sealed with disposable Instrumentation splashproof boot Telecommunications and Long life contact design networking equipment Snap-fitting plunger available Computers and peripherals RoHS compliant models available Models Available Specifications Materials CONTACT RATING: B contact material (EX25 Models): 0.4 VA max. CASE & BUSHING: Glass filled nylon 6/6, flame retardant 20 V AC or DC max. G contact material (EX21 Models): 1 AMP (UL 94V-0). 120 V AC or 28 V DC or 0.4 VA max. 20 V AC or DC max. PLUNGER: Glass filled nylon or glass filled polyester (PBT) Note: Break-before-make contacts. Multi-pole contacts (UL 94V-0). do not make and break simultaneously. See page A-26 for SWITCH SUPPORT: Brass or steel, matte-tin. additional ratings. SWITCH SUPPORT RETAINER: Stainless steel. ELECTRICAL LIFE: 60,000 make-and-break cycles at full load. N.O. & N.C. CONTACTS: EX25 MODELS: B contact material: Copper CONTACT RESISTANCE: Below 50 m typ. initial alloy, with gold plate over nickel plate. EX21 MODELS: G contact 24 V DC, 100 mA, for both silver and gold plated contacts. material: Coin silver, with gold plate over nickel plate. See page 9 INSULATION RESISTANCE: 10 min. A-26 for additional contact materials. DIELECTRIC STRENGTH: 1000 Vrms min. sea level. COMMON CONTACTS & ALL TERMINALS: Copper alloy, with OPERATING TEMPERATURE: 30C to 75C. gold plate over nickel plate. See page A-26 for additional contact materials. CAP INSTALLATION FORCE: 10 lbs. max. permissible. TERMINAL SEAL: Epoxy. SOLDERABILITY: Per MIL-STD-202F method 208D, or DISPOSABLE BOOT: Vinyl splashproof boot supplied standard. EIA RS-186E method 9 (1 hour steam aging). Remove and discard only after soldering and cleaning NOTE: Any models supplied with P, R, B or G contact material are RoHS compliant. processes are complete. 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-22 thru A-28. For additional options not shown in catalog, consult our Customer Service Center. All models are process sealed to withstand machine soldering temperatures and pressure wash cleaning methods. Switch Function E121 SPDT On-Mom. 1 Amp E221 DPDT On-Mom. 1 Amp E125 SPDT On-Mom. 0.4VA E225 DPDT On-Mom. 0.4VA Plunger S .282 high M .331 high, snap-fitting Bushing S1 .332 high D1 Unthreaded D3 .180 high, unthreaded Terminations A Right angle, PC thru-hole Contact Material AV2 Vertical right angle, PC thru-hole B Gold C PC Thru-hole G Gold over silver A3 Right angle, snap-in, PC thru-hole P Gold, matte-tin AV3 Vertical right angle, snap-in, PC thru-hole R Gold over silver, matte-tin V3 .460 high, V-bracket V4 .630 high, V-bracket V6 .460 high, V-bracket V8 .953 high, V-bracket Seal V31 .460 high, snap-in V-bracket E Epoxy and disposable V41 .630 high, snap-in V-bracket splashproof boot V61 .460 high, snap-in V-bracket Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ck-components.com A-21 E020 Series Sealed Snap-acting Momentary Pushbutton Switches SWITCH FUNCTION A SWITCH FUNCTION CONNECTED TERMINALS POS. 1 POS. 2 POS. 1 POS. 2 NO. MODEL C&K marking this side C&K marking this side POLES NO. SCHEMATIC E121 ON MOM. SP 1-3 1-2 E125 ON MOM. SPDT SPDT Terminal Nos. For Reference Only Part number shown: E121SD1CGE E221 ON MOM. DP 1-3,4-6 1-2,4-5 E225 ON MOM. DPDT DPDT Terminal Nos. Part number shown: E221SD1CBE For Reference Only MOM. = Momentary EX25 models must be ordered with B or P contact material. EX21 models must be ordered with G or R contact material. E121, E221 models with all options when ordered with G or R contact material. PLUNGER S .282 HIGH S1 .332 HIGH M .332 HIGH SNAP-FITTING Not Available with D1 bushing. NOTE: Caps available for all plunger options, see page A-27. BUSHING D1 UNTHREADED D3 .180 HIGH UNTHREADED Not available with S1 actuator. Third Angle NOTE: Disposable splashproof vinyl over actuator and bushing supplied std., see page A-26. Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change www.ck-components.com A-22 Pushbutton