series scb snap switch pushbuttons www.nkk.com c131 indicators accessories supplement tactiles keylocks rotaries c pushbuttons illuminated pb slides programmable toggles rockers touch tilt poles 1 spdt 2 dpdt typical switch ordering example round red cap with black shroud dpdt on-(on) circuit description for typical ordering example scb25p15a-4ca colors caps shrouds a black a b white b c red C f green C g blue C h gray h circuits 5 on (on) 6 on on ( ) = momentary bushings p plastic (with momentary only) s steel 2 scb p 5 a 4 ca terminals a .187 (4.75mm) quick connect * b .250 (6.35mm) quick connect note: contact factory for availability of screw lug and solder lug models. * available in americas only caps & shrouds for momentary 3 .520 (13.2mm) diameter cap for momentary & alternate action 4 round cap & shroud (at454 & at455) 5 rectangular cap & shroud (at452 & at453) general specifications electrical capacity resistive load: 15a & 1 ? 2 hp @ 125 or 250v ac for high capacity models lamp load: 5a @ 125v ac other ratings contact resistance: 15 milliohms maximum insulation resistance: 100 megohms minimum @ 500v dc dielectric strength: 1,000v ac minimum between contacts for 1 minute minimum; 1,500v ac minimum between contacts & case for 1 minute minimum mechanical life: 1,000,000 operations minimum electrical life: 50,000 operations minimum travel: pretravel .047 (1.19mm); overtravel .040 (1.01mm); differential .011 (0.27mm) operating temp range: C40c through +85c (C40f through +185f) materials & finishes caps & shrouds: polycarbonate with glossy fnish or pbt plunger: polyacetal or brass with nickel plating bushing: steel with zinc plating or glass fber reinforced polyamide case: polyester movable & stationary contacts: silver alloy terminals: brass with silver plating standards & certifications ul: internal snap switch is ul recognized. csa: internal snap switch is csa certifed. 15 rating 15 15a 15a rating plastic bushing .187 (4.75mm) quick connect terminals note: standard hardware is provided with caps. see bushing detail for more information.
series scb snap switch pushbuttons www.nkk.com c132 indicators accessories supplement tactiles keylocks rotaries c pushbuttons illuminated pb slides programmable rockers touch tilt toggles a (10.0) .394 bushings terminals plastic (for momentary only) .187 (4.75mm) quick connect p a b steel s maximum effective panel thickness: momentary: .177 (4.5mm) without shroud .157 (4.0mm) with shroud alternate action: .354 (9.0mm) standard hardware provided with caps cap option 3: at504m knurled face nut, at508 lockwasher, at527m hex mounting nut cap options 4 & 5: at508 lockwasher & at527m hex mounting nut a = 11.2mm momentary 15.5mm alternate action maximum effective panel thickness: .165 (4.2mm) without shroud .157 (4.0mm) with shroud .250 (6.35mm) quick connect (6.35) .250 (4.06) .160 (8.38) .330 (10.54) .415 thk = (0.81) .032 (4.75) .187 (3.18) .125 (10.16) .400 (9.78) .385 thk = (0.5) .020 (12.5) dia .492 (11.5) .453 (1.5) .060 (12.5) dia .492 (11.5) .453 (1.5) .060 plunger position ( ) = momentary connected terminals throw & schematics pole model normal down normal down note: terminal numbers are actually on the switch. sp scb15 scb16 on on (on) on 1-2 1-3 spdt dp scb25 scb26 on on (on) on 1-2 1-2 1-3 1-3 sp with 2 switches poles & circuits 1 3 2 1 3 2 1 3 2 keyway keyway
series scb snap switch pushbuttons www.nkk.com c133 indicators accessories supplement tactiles keylocks rotaries c pushbuttons illuminated pb slides programmable toggles rockers touch tilt (10.3) .406 (22.23) .875 (22.1) .870 (7.85) max .309 no 3 nc 2 (0.5) ty p .020 (5.84) .230 (13.97) .550 (1.02) .040 com 1 (21.2) .835 (0.6) .024 (12.0) .472 (2.0) .079 m 12 p1 shown with (4.0) panel .157 (24.0) dia .945 (17.7) dia .697 (11.2) .441 (21.6) .850 (10.3) .406 m12 p1 no 3 nc 2 (0.5) ty p .020 (5.84) .230 (4.5) .177 com 1 (13.97) .550 (22.23) .875 (7.85) max .309 (1.02) .040 (14.2) .559 (11.0) .433 (13.2) dia .520 keyway c l c l (14.0) .551 (15.4) .606 (21.0) .827 (20.7) .815 keyway (12.0) .472 (2.0) .079 (10.3) .406 m12 p1 (0.81) ty p .032 shown with (4.0) panel .157 (26.2) 1.031 (19.4) .764 (14.35) .565 (8.08) .318 (22.23) .875 com 1 (21.6) .850 (7.85) max .309 (48.1) 1.893 nc 2 no 3 (1.02) .040 typical switch dimensions .520 (13.2mm) dia. cap ? .187 (4.75mm) quick connect rectangular cap & shroud ? .250 (6.35mm) quick connect scb25p15a-4ca scb26s15b-5ca round cap & shroud ? .187 (4.75mm) quick connect scb15s15a-3c (28.0) 1.102 (10.16) .400 (18.0) .709 (4.75) .187 (3.18) .125 (28.83) 1.135 (10.16) .400 (9.78) .385 (4.75) ty p .187 (28.83) 1.135 (3.18) .125 (9.78) .385 (10.16) .400 (28.2) 1.110 (20.32) .800 (27.0) 1.063 (6.35) ty p .250 (28.83) 1.135 (20.32) .800 (27.0) 1.063 (4.06) .160 (8.38) .330 (10.54) .415 (28.4) 1.118
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