NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com

03-07

Miniature Pushbuttons

Series KB

General Specifications

Electrical Capacity (Resistive Load)

Power Level (code W):

1A @ 125/250V AC or 1A @ 30V DC

Logic Level (code G):

0.4VA maximum @ 28V AC/DC maximum

(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)

Note: Find additional explanation of operating range in Supplement section.

Other Ratings

Contact Resistance:

50 milliohms maximum

Insulation Resistance:

1,000 megohms minimum @ 500V DC

Dielectric Strength:

1,000V AC minimum between contacts & 1,500 minimum between contacts & case (silver)

for 1 minute minimum;

750V AC minimum between contacts & 1,500 minimum between contacts & case (gold)

for 1 minute minimum;

Mechanical Life:

100,000 operations minimum

Electrical Life:

50,000 operations minimum for silver; 100,000 operations minimum for gold

Nominal Operating Force:

Single pole 0.98 ~ 2.45N for maintained & 0.98 ~ 1.96N for momentary;

Double pole 1.47 ~ 3.43N for maintained & 1.47 ~ 2.94N for momentary

Contact Timing:

Nonshorting (break-before-make)

Travel:

Pretravel .087” (2.2mm); Overtravel .031” (0.80mm); Total Travel .118” (3.0mm)

Materials & Finishes

Housing:

Polyamide (UL94V-0)

Movable Contactor:

Silver for power circuit; copper with gold plating for logic level circuit

Stationary Contacts:

Silver for power circuit; copper with gold plating for logic level circuit

Housing Base:

Polyamide (UL94V-0)

Terminal Base:

Polyester

Common Terminal:

Phosphor bronze with silver flash plating for power circuit;

Phosphor bronze with gold flash plating for logic level circuit

End Terminals:

Brass with silver flash plating for power circuit;

Brass with gold flash plating for logic level circuit

Environmental Data

Operating Temp Range:

–25°C through +70°C (–13°F through +158°F)

Humidity:

90 ~ 95% humidity for 96 hours @ 40°C (104°F)

Vibration:

10 ~ 55Hz with peak-to-peak amplitude of 1.5mm traversing the frequency range & returning in

1 minute; 3 right angled directions for 2 hours

Shock:

Installation

Mounting Torque:

Cap Installation Force:

4.51N (1.0 lbf) maximum downward force on cap

Soldering Time & Temperature:

Manual Soldering: See Profile A in Supplement section.

Standards & Certifications

Flammability Standards:

UL94V-0 housing & housing base

UL & C-UL Recognized:

Single & double pole models recognized at 1A @ 125/250V AC, 1A @ 30V DC, & 0.4A @ 28V DC;

UL File No. WOYR2.E44145; add “/U” to end of part number to order UL mark on switch;

C-UL File No. WOYR8.E44145; add “/C-UL” to end of part number to order C-UL mark on switch

CSA Certified:

Single & double pole models recognized at 1A @ 125/250V AC, 1A @ 30V DC,

& 0.4VA @ 28V maximum; CSA File No. 023535-0-000;

add “/C” to end of part number to order CSA mark on switch.

R