Series MB2000

Miniature Pushbuttons

C72

C

www.nkkswitches.com

General Specifications

Electrical Capacity (Resistive Load)

Power Level (silver):

6A @ 125V AC & 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)

Logic/Power Level:

Combines silver & gold ratings

(gold over silver)

Note: Find additional explanation dual rating & operating range in Supplement section.

Other Ratings

Contact Resistance:

10 milliohms maximum for silver; 20 milliohms maximum for gold

Insulation Resistance:

1,000 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:

50,000 operations minimum for splashproof models; 100,000 for all other models

Electrical Life:

25,000 operations minimum for silver; 50,000 operations minimum for gold

50,000 operations minimum for silver at 3A @ 125V AC

Nominal Operating Force:

Momentary Action: 1-pole 9.32N; 2-pole 16.18N; 4-pole 25.54N;

Alternate Action: 1-pole 4.41N; 2-pole 7.06N; 4-pole 11.77N

Contact Timing:

Slow make, slow break

Plunger Travel:

Screw-on Cap (Mom.)

Screw-on Cap (Alt.)

Snap-on Cap (Mom. & Alt.)

Pretravel:

.028” (0.71mm)

.110” (2.80mm)

.125” (3.19mm)

Overtravel:

.043” (1.09mm)

.043” (1.09mm)

.050” (1.26mm)

Total Travel

.071” (1.80mm)

.153” (3.90mm)

.175” (4.45mm)

Materials & Finishes

Plunger:

Brass w/nickel plating; polyacetal w/B1 bushing

Bushing:

Brass with nickel plating

Frame:

Stainless steel

Case:

Diallyl phthalate resin (UL94V-0)

Movable Contactor:

Phosphor bronze with silver or gold plating

Movable Contacts:

Silver alloy (code W); copper with gold plating (code G); or silver alloy with gold plating (code A)

Stationary Contacts:

Silver with silver plating (code W); copper or brass with gold plating (code G); or

silver with gold plating (code A)

Terminals:

Copper or brass with silver plating; copper or brass with gold plating

Environmental Data

Operating Temp Range:

–30°C through +85°C (–22°F through +185°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:

B3 & D3 bushing options equivalent to IP67

Installation

Mounting Torque:

1.5Nm (13.0 lb•in) for double nut; 0.7Nm (6.0 lb•in) for single nut

Cap Installation Force:

80.0N (18.0 lbf) maximum downward force on actuator

Soldering Time & Temp:

Wave Soldering (PC version): See Profile A in Supplement section.

Manual Soldering: See Profile A in Supplement section.

Process Seal:

These devices are not process sealed. Hand clean locally using alcohol based solution.

Standards & Certifications

Flammability Standards:

UL94V-0 case

UL:

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

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

All models recognized at 6A @ 125V AC or 3A @ 250V AC or 0.4VA max. @ 28V DC max.

CSA:

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

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

All models certified at 6A @ 125V AC or 3A @ 250V AC or 0.4VA max. @ 28V max.