Snap Switch Pushbuttons
GENERAL SPECIFICATIONS
Electrical Capacity Other Ratings
Resistive Load: Lamp Load: 15A & 1⁄2 HP @ 125 or 250V AC for high capacity models 5A @ 125V AC
Series SCB
Contact Resistance: Insulation Resistance: Dielectric Strength:
Mechanical Life: Electrical Life: Travel: Operating Temp Range:
15 milliohms maximum 100 megohms minimum @ 500V DC 1,000V AC minimum between contacts for 1 minute minimum; 1,500V AC minimum between contacts & case for 1 minute minimum 1,000,000 operations minimum 50,000 operations minimum Pretravel .047” (1.19mm); Overtravel .040” (1.01mm); Differential .011” (0.27mm) –40°C through +85°C (–40°F through +185°F) Polycarbonate with glossy finish or PBT Polyacetal or brass with nickel plating Steel with zinc plating or glass fiber reinforced polyamide Polyester Silver alloy Brass with silver plating Internal snap switch is UL recognized. Internal snap switch is CSA certified.
Materials & Finishes
Caps & Shrouds: Plunger: Bushing: Case: Movable & Stationary Contacts: Terminals: UL Recognized: CSA Certified:
Standards & Certifications
TYPICAL SWITCH ORDERING EXAMPLE
SCB
POLES
1 2 SPDT DPDT
2
5
P
TERMINALS
15
A
1 2 3 4 5
4
CAPS & SHROUDS
For Momentary .315” (8.0mm) Diameter Cap .394” (10.0mm) Diameter Cap .520” (13.2mm) Diameter Cap Round Cap and Shroud Rectangular Cap and Shroud
CA
A
.187” (4.75mm) Quick Connect .250” (6.35mm) Quick Connect
CIRCUITS
5 6 ON ON (ON) ON
B
Note: Contact factory for availability of screw lug and solder lug models.
For Momentary & Alternate Action
( ) = Momentary
BUSHINGS
P S Plastic (with momentary only) Steel
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
SCB25P15A-4CA
Round Red Cap with Black Shroud Plastic Bushing DPDT ON-(ON) Circuit 15A Rating .187” (4.75mm) Quick Connect Terminals
COLORS
Caps A B C F G H Shrouds Black White Red Green Blue Gray A B – – – H
RATING
15 15A
Note: Standard hardware provided with caps. See Bushing detail for more information.
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08
Snap Switch Pushbuttons
POLES & CIRCUITS
Plunger Position ( ) = Momentary Normal
Keyway
Series SCB
Throw & Schematics
Connected Terminals Normal
Keyway
Down
Down Note: Terminal numbers are actually on the switch.
Pole SP
Model SCB15 SCB16 SCB25 SCB26 ON ON ON ON (ON) ON (ON) ON 1-2 1-3 SPDT
1
2 3
DP
1-2 1-2
1-3 1-3
SP with 2 switches
1 1
2 3 2 3
BUSHINGS P
Plastic (for Momentary only)
(12.5) Dia .492 (11.5) .453 (1.5) .060
A
S
Steel
(12.5) Dia .492 (11.5) .453 (1.5) .060
(10.0) .394
Max. Effective Panel Thickness: .165” (4.2mm) without Shroud .157” (4.0mm) with Shroud
“A” = 11.2mm Momentary 15.5mm Alternate Action
Max. 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 Options 1, 2, & 3: AT504M Knurled Face Nut, AT508 Lockwasher, AT527M Hex Mounting Nut Cap Options 4 & 5: AT508 Lockwasher & AT527M Hex Mounting Nut
TERMINALS A
.187” (4.75mm) Quick Connect
(9.78) .385 (3.18) .125 (10.16) .400 (4.75) .187 Thk = (0.5) .020
B
.250” (6.35mm) Quick Connect
(8.38) .330 (4.06) .160
(10.54) .415
(6.35) .250 Thk = (0.81) .032
TYPICAL SWITCH DIMENSION
.315” (8.0mm) Dia. Cap • .250” (6.35mm) Quick Connect
C L (0.81) Typ .032
NC 2
(8.08) .318 (1.02) .040 (14.35) .565 (8.38) .330
(6.35) .250
(4.06) .160 (10.54) .415
NO 3
M12 P1 (8.0) Dia .315 Keyway C L (14.0) .551
COM 1
(22.23) .875
(28.2) 1.110
(28.83) 1.135
SCB15P15B-1C
(6.5) .256 (10.8) .425
(0.6) .024 (10.6) .417
(10.3) .406 (22.1) .870
(7.85) Max .309
(10.16) .400 (18.0) .709
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
05-08
Snap Switch Pushbuttons
TYPICAL SWITCH DIMENSIONS
.394” (10.0mm) Dia. Cap • .187” (4.75mm) Quick Connect
C L
Series SCB
(4.75) .187 (3.18) .125 (9.78) .385 (10.16) .400
(0.5) Typ .020
NC 2
(5.84) .230 (1.02) .040 (13.97) .550
NO 3
M12 P1 (4.5) .177 (10.0) Dia .394 C L (8.0) .315 (11.8) .465
COM 1
(22.23) .875
(28.0) 1.102
(28.83) 1.135
Keyway
SCB15S15A-2A
(11.2) .441
(10.3) .406 (21.6) .850
(7.85) Max .309
(10.16) .400 (18.0) .709
.520” (13.2mm) Dia. Cap • .187” (4.75mm) Quick Connect
C L (0.5) Typ .020
NC 2
(5.84) .230 (1.02) .040 (13.97) .550 (9.78) .385
(4.75) .187 (3.18) .125 (10.16) .400
NO 3
M12 P1 (4.5) .177 (13.2) Dia .520 (11.0) .433 (14.2) .559
COM 1
(22.23) .875
(28.0) 1.102
(28.83) 1.135
C L
Keyway (11.2) .441
SCB15S15A-3C
(10.3) .406 (21.6) .850
(7.85) Max .309
(10.16) .400 (18.0) .709
Round Cap & Shroud • .187” (4.75mm) Quick Connect
(14.0) .551 Shown with (4.0) Panel .157 (0.5) Typ .020
NC 2
(5.84) .230 (1.02) .040 (13.97) .550
(4.75) Typ .187 (3.18) .125 (9.78) .385 (10.16) .400
NO 3
(17.7) Dia .697 (24.0) Dia .945 M12 P1 (10.3) .406 (0.6) .024 (22.1) .870
COM 1
(22.23) .875
(28.2) 1.110
(28.83) 1.135
(2.0) .079
SCB25P15A-4CA
(12.0) .472 (21.2) .835
(7.85) Max .309
(27.0) 1.063
(20.32) .800
Rectangular Cap & Shroud • .250” (6.35mm) Quick Connect
(20.7) .815 Shown with (4.0) Panel .157 (0.81) Typ .032
NC 2
(8.08) .318
NO 3
(6.35) Typ .250 (4.06) .160 (1.02) .040 (14.35) .565 (8.38) .330 (10.54) .415
M12 P1
(19.4) .764 (26.2) 1.031 Keyway (15.4) .606 (21.0) .827 (2.0) .079 (12.0) .472 (48.1) 1.893 (10.3) .406 (21.6) .850
COM 1
(22.23) .875
(28.4) 1.118
(28.83) 1.135
(7.85) Max .309 (20.32) .800 (27.0) 1.063
SCB26S15B-5CA
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
05-08
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