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NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 www.nkkswitches.com
Miniature Pushbuttons Series KB
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
Note: See Supplement Index (page Z1) to find explanation of operating range.
Other Ratings
Contact Resistance: 50 milliohms maximum
Insulation Resistance: 1,000 megohms minimum @ 500V DC
Dielectric Strength: For Silver: 1,000V AC minimum between contacts for 1 minute minimum &
1,500V AC minimum between contacts & case for 1 minute minimum;
For Gold: 750V AC minimum between contacts for 1 minute minimum &
1,500V AC minimum between contacts & case 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 100 ~ 250 grams for maintained & 100 ~ 200 grams for momentary;
Double pole 150 ~ 350 grams for maintained & 150 ~ 300 grams for momentary
Contact Timing: Nonshorting (break-before-make)
Travel: 2.2mm (.087") pretravel; 0.80mm (.031") overtravel; 3.0mm (.118") total travel
Materials & Finishes
Housing: Polyamide
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 Terminal Base: Polyester
Common Terminals: 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
Lamp Terminals: Phosphor bronze with nickel flash plating
Environmental Data
Operating Temp Range: -25°C through +50°C (-13°F through +122°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: 50G (490m/s2) acceleration (tested in 6 right angled directions, with 3 shocks in each direction)
Installation
Mounting Torque: .78Nm (6.9 lb•in) maximum
Cap Installation Force: 4.51N (1.0 lbf) maximum downward force on cap
Soldering Time & Temperature: 3 seconds @ 350°C or 5 seconds @ 270°C
Process Seal: Not available
Standards & Certifications
Flammability Standards: UL94V-0 housing & base
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.
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.
General Specifications
12-02