Snap Switch Pushbuttons
Series SCB
GENERAL SPECIFICATIONS
Electrical Capacity
1
Resistive Load: 15A & ⁄
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
C
Electrical Life: 50,000 operations minimum
Travel: Pretravel .047” (1.19mm); Overtravel .040” (1.01mm); Differential .011” (0.27mm)
Operating Temp Range: –40°C through +85°C (–40°F through +185°F)
Materials & Finishes
Caps & Shrouds: Polycarbonate with glossy finish or PBT
Plunger: Polyacetal or brass with nickel plating
Bushing: Steel with zinc plating or glass fiber 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 certified.
TYPICAL SWITCH ORDERING EXAMPLE
SCB 2 5 P 15 A
4 CA
Poles
Caps & Shrouds
1
2
SPDT
DPDT
For Momentary
Terminals
3
.520” (13.2mm) Diameter Cap
A
.187” (4.75mm) Quick Connect
For Momentary & Alternate Action
Circuits
* B .250” (6.35mm) Quick Connect
4
Round Cap & Shroud
(AT454 & AT455)
5
ON (ON)
Note: Contact factory for availability of
screw lug and solder lug models.
6
ON
ON
5
Rectangular Cap & Shroud
(AT452 & AT453)
* Available in Americas only
( ) = Momentary
Bushings
Colors
Plastic (with
P
Caps
Shrouds
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
SCB25P15A-4CA
momentary only)
A
Black
White
Red
A
B
–
S
Steel
B
C
F
Round Red Cap with
Black Shroud
Rating
15 15A
Green
Blue
–
G
H
–
Plastic Bushing
DPDT
Gray
H
ON-(ON) Circuit
.187” (4.75mm)
Quick Connect
Terminals
15A Rating
Note: Standard hardware is provided with caps. See Bushing detail for more information.
www.nkk.com
C131