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.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
05-08
NKK [ NIHON KAIHEIKI INDUSTRY CO. LTD. ]
