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
Toggles
Materials & Finishes
Standards & Certifications
Caps & Shrouds:
Plunger:
Bushing:
Case:
Movable & Stationary Contacts:
Terminals:
UL:
CSA:
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.
TYPICAL SWITCH ORDERING EXAMPLE
SCB
Poles
1
2
SPDT
DPDT
2
5
P
Terminals
15
A
3
4
5
4
Caps & Shrouds
For Momentary
.520” (13.2mm) Diameter Cap
Round Cap & Shroud
(AT454 & AT455)
Rectangular Cap & Shroud
(AT452 & AT453)
CA
Circuits
5
6
ON
ON
(ON)
ON
*B
.250” (6.35mm) Quick Connect
For Momentary & Alternate Action
Note: Contact factory for availability of
screw lug and solder lug models.
*
Available in Americas only
( ) = Momentary
Bushings
P
S
Plastic (with
momentary only)
Steel
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
Colors
SCB25P15A-4CA
Round Red Cap with
Black Shroud
DPDT
ON-(ON) Circuit
15A Rating
Plastic Bushing
.187” (4.75mm)
Quick Connect
Terminals
A
B
C
F
G
H
Black
White
Red
Green
Blue
Gray
A
B
–
–
–
H
Accessories
Supplement
Indicators
Touch
Caps
Shrouds
Rating
15
15A
Note: Standard hardware is provided with caps. See Bushing detail for more information.
www.nkk.com
C131
Tilt
Tactiles
A
.187” (4.75mm) Quick Connect
Slides
Rotaries
Keylocks
Programmable Illuminated PB
Mechanical Life:
Electrical Life:
Travel:
Operating Temp Range:
C
Pushbuttons
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
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)
Rockers
Series SCB
Toggles
Snap Switch Pushbuttons
POLES & CIRCUITS
Rockers
Plunger Position
( ) = Momentary
Normal
Pole
Model
Keyway
Connected Terminals
Normal
Keyway
Throw & Schematics
Down
Down
Note:
Terminal numbers are
actually on the switch.
Pushbuttons
C
SP
SCB15
SCB16
ON
ON
(ON)
ON
1-2
1-3
SPDT
1
2
3
Programmable Illuminated PB
1
2
3
DP
SCB25
SCB26
ON
ON
(ON)
ON
1-2 1-2
1-3 1-3
SP with
2 switches
1
2
3
BUSHINGS
P
Plastic
(for Momentary only)
(10.0)
.394
A
Keylocks
S
Steel
Rotaries
“A” =
11.2mm
Momentary
15.5mm
Alternate Action
Slides
(12.5) Dia
.492
(11.5)
.453
(1.5)
.060
(12.5) Dia
.492
(11.5)
.453
(1.5)
.060
Tactiles
Maximum Effective Panel Thickness:
.165” (4.2mm) without Shroud
.157” (4.0mm) with Shroud
Maximum Effective Panel Thickness:
Momentary: .177” (4.5mm) without Shroud
.157” (4.0mm) with Shroud
Alternate Action: .354” (9.0mm)
Tilt
Standard Hardware Provided with Caps
Touch
Cap Option 3: AT504M Knurled Face Nut, AT508 Lockwasher, AT527M Hex Mounting Nut
Cap Options 4 & 5: AT508 Lockwasher & AT527M Hex Mounting Nut
Indicators
TERMINALS
A
.187” (4.75mm)
Quick Connect
Accessories
B
(9.78)
.385
(3.18)
.125
(10.16)
.400
(4.75)
.187
Thk = (0.5)
.020
.250” (6.35mm)
Quick Connect
(8.38)
.330
(4.06)
.160
(10.54)
.415
Supplement
(6.35)
.250
Thk = (0.81)
.032
C132
www.nkk.com
Snap Switch Pushbuttons
TYPICAL SWITCH DIMENSIONS
Series SCB
.520” (13.2mm) Dia. Cap • .187” (4.75mm) Quick Connect
Rockers
Toggles
(10.16)
.400
C
L
NC 2
NO 3
(1.02)
.040 (13.97)
.550
(9.78)
.385
M12 P1
(4.5)
.177
(13.2) Dia
.520
(11.0)
.433
(14.2)
.559
COM
1
C
C
L
Keyway
(11.2)
.441
(10.3)
.406
(21.6)
.850
(7.85) Max
.309
(10.16)
.400
(18.0)
.709
SCB15S15A-3C
(14.0)
.551
Shown with (4.0) Panel
.157
NC 2
NO 3
(1.02)
.040 (13.97)
.550
(9.78)
.385
(10.16)
.400
(17.7) Dia
.697
(24.0) Dia
.945
M12 P1 (10.3)
.406
(0.6)
.024
(22.1)
.870
COM
1
(2.0)
.079
(12.0)
.472
(21.2)
.835
(20.32)
.800
(27.0)
1.063
SCB25P15A-4CA
Tilt
Rectangular Cap & Shroud • .250” (6.35mm) Quick Connect
Touch
(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
(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
(7.85) Max
.309
(20.32)
.800
(27.0)
1.063
SCB26S15B-5CA
www.nkk.com
C133
Supplement
Accessories
(19.4)
.764
COM
1
(22.23)
.875
(28.4)
1.118
(28.83)
1.135
Indicators
Tactiles
(7.85) Max
.309
Slides
(22.23)
.875
(28.2)
1.110
(28.83)
1.135
Rotaries
(0.5) Typ
.020
(5.84)
.230
(4.75) Typ
.187
(3.18)
.125
Keylocks
Round Cap & Shroud • .187” (4.75mm) Quick Connect
Programmable Illuminated PB
(22.23)
.875
(28.0)
1.102
(28.83)
1.135
Pushbuttons
(0.5) Typ
.020
(5.84)
.230
(4.75)
.187 (3.18)
.125
PCB Design
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