Series LB

Standard Size Panel Seal Pushbuttons

D59

D

www.nkkswitches.com

General Specifications

Electrical Capacity (Resistive Load)

Power Level (silver):

3A @ 125V AC or 3A @ 250V AC or 3A @ 30V DC

Logic Level (gold):

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 for silver; 100 milliohms maximum for gold

Insulation Resistance:

200 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 for momentary circuit

200,000 operations minimum for maintained circuit

Electrical Life:

100,000 operations minimum

Nominal Operating Force:

5.39N

Contact Timing:

Nonshorting (break-before-make)

Travel:

Pretravel .059” (1.5mm); Overtravel .059” (1.5mm); Total Travel .118” (3.0mm)

Materials & Finishes

Housing:

Glass fiber reinforced polyamide (UL94V-0)

O-ring:

Nitrile butadiene rubber

Inner Seal:

Silicone rubber

Movable Contact:

Silver alloy or copper with gold plating

Stationary Contacts:

Silver alloy or copper with gold plating

Base:

Liquid crystal polymer (UL94V-0)

Switch Terminals:

Phosphor bronze with silver or gold plating

Lamp Terminals:

Brass with silver plating

Environmental Data

Operating Temperature Range:

–25°C through +50°C (–13°F through +122°F) for Illuminated

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

Note: When used with a polyvinyl chloride splash cover, the lowest limit is 0°C (32°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 5 shocks in each direction)

Sealing:

IP65 of IEC60529 standard (similar to NEMA 4 & 13)

Installation

Mounting Torque:

1.96Nm (17.35 lb•in) maximum

Cap Installation Force:

3.92N maximum downward force on cap

Quick Connect Force:

52.95N maximum downward force on connector

Soldering Time & Temperature:

Manual Soldering: See Profile A in Supplement section.

Standards & Certifications

Flammability Standards:

UL94V-0 housing & base

UL:

File No. E44145 - Recognized only when ordered with marking on switch.

Add “/U” or “/CUL” before first dash in part number to order UL recognized switch.

All models recognized at 3A @ 125V or 250V AC or 0.4VA @ 28V AC/DC maximum.

CSA:

File No. 023535_0_000 - Certified only when ordered with marking on switch.

Add “/C” before first dash in part number to order CSA certified switch.

All models certified at 3A @ 125V or 250V AC or 0.4VA @ 28V AC/DC maximum.