E020 Series Sealed Snap-acting Momentary Pushbutton Switches Features/Benefits • Process sealed with disposable • Long life contact design • Snap-fitting plunger available • RoHS compliant models available A Pushbutton splashproof boot Typical Applications • Instrumentation • Telecommunications and networking equipment • Computers and peripherals 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. CONTACT RESISTANCE: Below 50 mΩ typ. initial @ 2–4 V DC, 100 mA, for both silver and gold plated contacts. INSULATION RESISTANCE: 109Ω min. N.O. & N.C. CONTACTS: EX25 MODELS: B contact material: Copper alloy, with gold plate over nickel plate. EX21 MODELS: G contact material: Coin silver, with gold plate over nickel plate. See page A-26 for additional contact materials. DIELECTRIC STRENGTH: 1000 Vrms min. @ sea level. CAP INSTALLATION FORCE: 10 lbs. max. permissible. COMMON CONTACTS & ALL TERMINALS: Copper alloy, with gold plate over nickel plate. See page A-26 for additional contact materials. SOLDERABILITY: Per MIL-STD-202F method 208D, or TERMINAL SEAL: Epoxy. EIA RS-186E method 9 (1 hour steam aging). DISPOSABLE BOOT: Vinyl splashproof boot supplied standard. Remove and discard only after soldering and cleaning processes are complete. OPERATING TEMPERATURE: –30ºC to 75ºC. NOTE: Any models supplied with P, R, 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-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 S1 .332" high Bushing D1 Unthreaded D3 .180" high, unthreaded Terminations Right angle, PC thru-hole A AV2 Vertical right angle, PC thru-hole C PC Thru-hole A3 Right angle, snap-in, PC thru-hole AV3 Vertical right angle, snap-in, PC thru-hole V3 .460" high, V-bracket V4 .630" high, V-bracket V6 .460" high, V-bracket V8 .953" high, V-bracket V31 .460" high, snap-in V-bracket V41 .630" high, snap-in V-bracket V61 .460" high, snap-in V-bracket Contact Material B Gold G Gold over silver P Gold, matte-tin R Gold over silver, matte-tin Seal E Epoxy and disposable splashproof boot Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-21 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches SWITCH FUNCTION Pushbutton A NO. POLES SWITCH FUNCTION POS. 1 POS. 2 CONNECTED TERMINALS POS. 1 POS. 2 C&K marking this side C&K marking this side MODEL NO. E121 ON MOM. E125 ON MOM. SP 1-3 SCHEMATIC 1-2 SPDT SPDT Terminal Nos. For Reference Only Part number shown: E121SD1CGE E221 ON MOM. E225 ON MOM. DP 1-3,4-6 1-2,4-5 DPDT DPDT Terminal Nos. For Reference Only Part number shown: E221SD1CBE EX25 models must be ordered with B or P contact material. EX21 models must be ordered with G or R contact material. MOM. = Momentary E121, E221 models with all options when ordered with G or R contact material. PLUNGER S S1 .282" HIGH M .332" HIGH .332" HIGH SNAP-FITTING Not Available with D1 bushing. NOTE: Caps available for all plunger options, see page A-27. BUSHING D1 D3 UNTHREADED .180" HIGH UNTHREADED Not available with S1 actuator. NOTE: Disposable splashproof vinyl over actuator and bushing supplied std., see page A-26. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-22 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches TERMINATIONS A PC THRU-HOLE Pushbutton C PC MOUNTING SPDT and DPDT A RIGHT ANGLE, PC THRU-HOLE E121SD1AGE SPDT SECTION A-A A3 PC MOUNTING RIGHT ANGLE, SNAP-IN, PC THRU-HOLE NOTE: Terminal bend radii and lead-in manufacturing option. A RIGHT ANGLE, PC THRU-HOLE E221SD1AGE DPDT SECTION A-A A3 RIGHT ANGLE, SNAP-IN, PC THRU-HOLE PC MOUNTING NOTE: Terminal bend radii and lead-in manufacturing option. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-23 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches TERMINATIONS Pushbutton A AV2 VERTICAL RIGHT ANGLE, PC THRU-HOLE, .150" PITCH E121SD1AV2GE SPDT SECTION A-A AV3 VERTICAL RIGHT ANGLE, SNAP-IN, PC THRU-HOLE, .150" PITCH PC MOUNTING NOTE: Terminal bend radii and lead-in manufacturing option. AV2 VERTICAL RIGHT ANGLE, PC THRU-HOLE, .150" PITCH E221SD1AV2GE DPDT AV3 SECTION A-A VERTICAL RIGHT ANGLE, SNAP-IN, PC THRU-HOLE, .150" PITCH PC MOUNTING NOTE: Terminal bend radii and lead-in manufacturing option. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-24 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches TERMINATIONS A Pushbutton V3, V4 VERTICAL MOUNT, V-BRACKET V31, V41 VERTICAL MOUNT, V-BRACKET, SNAP-IN PC MOUNTING Dim 'A' E121SD3__GE SPDT SNAP-IN OPTION CODE DIM ‘A’ V3, V31 .460 (11,68) V4, V41 .630 (16,00) V3, V4 VERTICAL MOUNT, V-BRACKET V31, V41 VERTICAL MOUNT, V-BRACKET, SNAP-IN PC MOUNTING E221SD3__GE DPDT Dim 'A' SNAP-IN OPTION CODE DIM ‘A’ V3, V31 .460 (11,68) V4, V41 .630 (16,00) V6, V8 VERTICAL MOUNT, V-BRACKET V61, V81 VERTICAL MOUNT, V-BRACKET, SNAP-IN PC MOUNTING .122 DIA. .192 (4,88) .060 MAX. (1,53) C&K MARKING ON OPPOSITE SIDE .180 (4,57) DIM ’A’ 1 C 2 3 NO NC .030 X .050 TYP. (0,76) (1,27) .020 TYP. (0,51) .185 TYP. (4,70) .185 (4,70) .050 (1,27) .250 (6,35) E121SD3__GE SPDT OPTION CODE DIM ‘A’ V6, V61 .460 (11,68) V8, V81 .953 (24,21) .360 (9,14) .750 (19,05) Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-25 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches TERMINATIONS Pushbutton A V6, V8 VERTICAL MOUNT, V-BRACKET V61, V81 VERTICAL MOUNT, V-BRACKET, SNAP-IN PC MOUNTING Dim 'A' SNAP-IN E221SD3V6GE DPDT OPTION CODE DIM ‘A’ V6, V61 .460 (11,68) V8, V81 .953 (24,21) CONTACT MATERIAL OPTION CODE CONTACT MATERIAL B GOLD 1 P G R TERMINAL PLATING RATINGS GOLD 1 EX25 MODELS ONLY: 0.4 VA MAX. LOW LEVEL/DRY CIRCUIT @ 20 V AC OR DC MAX. MATTE-TIN 4 GOLD OVER SILVER 2,3 GOLD 3 MATTE-TIN 4 LOW LEVEL/DRY CIRCUIT OR POWER EX21 MODELS ONLY: 0.4 VA MAX @ 20 V AC OR DC MAX. OR 1 AMP @ 120 V AC OR 28 V DC. * Note: See Technical Data section of this catalog for RoHS compliant and compatible definitions and specifications. 1 CONTACTS & TERMINALS: Copper alloy, with gold plate over nickel plate. NOTE: Any models supplied with P, R, B or G contact material are RoHS compliant. 2 N.O. AND N.C. CONTACTS: Coin silver, with gold plate over nickel plate. 3 COMMON CONTACTS & ALL TERMINALS: Copper alloy, with gold plate over nickel plate. E121, E221 models G, or R contact material. 4 TERMINALS: Copper alloy, with matte-tin alloy over nickel plate. with all options when ordered with mandatory P or B contact material must be ordered with EX25 models. R or G contact material must be ordered with EX21 models. SEAL E EPOXY SEAL AND DISPOSABLE SPLASHPROOF BOOT Disposable splashproof boot supplied standard. Remove and discard boot only after soldering and cleaning processes are complete. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-26 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches AVAILABLE HARDWARE Cap Cap A Cap Pushbutton .200 DIA. (5,08 ) .120 (3,05) .155 (3,94) PART NO. 708901000 708902000 708903000 PART NO. Material: Nylon Finish: Gloss 801801000 801802000 801803000 WHITE BLACK RED Material: Nylon Finish: Gloss Cap, Snap-fitting plunger Cap PART NO. PART NO. 894101000 894102000 894103000 WHITE BLACK RED Material: Nylon Finish: Gloss WHITE BLACK RED Material: Nylon Finish: Gloss Cap, Snap-fitting plunger PART NO. 894001000 894002000 894003000 PART NO. 752701000 752702000 752703000 WHITE BLACK RED PART NO. 484601000 484602000 484603000 WHITE BLACK RED Material: Nylon Finish: Gloss WHITE BLACK RED Material: Nylon Finish: Gloss 798201000 798202263 798203000 WHITE BLACK RED Material: Nylon Finish: Matte NOTE: Other cap colors available, consult Customer Service Center. TYPICAL APPLICATION Frames snap into panel opening and are independent from switch mounting. Accurate positioning of the PC mounted switch relative to the panel opening is necessary to provide proper clearance between actuator and frame. Available in two basic styles and four panel thicknesses .047-.125 in. Material: Nylon. Finish: Matte. .047" (1,19) PANEL THK. .062" (1,57) PANEL THK. .090" (2,29) PANEL THK. .125" (3,18) PANEL THK. PART NO. PART NO. PART NO. PART NO. 432501000 432502263 432503000 432601000 432602263 432603000 432701000 432702263 432703000 432801000 432802263 432803000 WHITE BLACK RED Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-27 www.ck-components.com E020 Series Sealed Snap-acting Momentary Pushbutton Switches AVAILABLE HARDWARE Pushbutton A PANEL INSERTS Above frames (part nos. 432XXXXXX) are also available with insert which accepts LED for indicator light assembly. Order insert separately from frame. Blank insert panel (without hole for LED) also available. LED not included. PANEL INSERT WITH HOLE FOR LED BLANK PANEL INSERT WITHOUT HOLE FOR LED PART NO. PART NO. 894901000 894902000 894903000 476601000 476602000 476603000 WHITE BLACK RED Special colors, custom markings available, consult Customer Service Center. Third Angle Projection Dimensions are shown: Inches (mm) Specifications and dimensions subject to change A-28 www.ck-components.com