Series MB2400 Snap-Action Pushbuttons General Specifications Electrical Capacity (Resistive Load) Power Level (silver): 3A 125V AC 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 of dual rating & operating range in Supplement section. C Other Ratings Contact Resistance: 20 milliohms maximum for silver 30 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: 200,000 operations minimum Electrical Life: 25,000 operations minimum for silver 100,000 operations minimum for gold Nominal Operating Force: Single pole 2.45N double pole 3.92N Travel Pretravel .024 (0.6mm) Overtravel .016 (0.4mm) Total Travel .039 (1.0mm) Materials & Finishes Plunger: Brass with nickel plating Bushing: Brass with nickel plating Frame: Stainless steel Case: Polybutylene terephthalate (PBT) (UL94V-0) Base: 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 alloy 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: 30C through +85C (22F through +185F) Humidity: 90 ~ 95% humidity for 96 hours 40C (104F) 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 2 Shock: 50G (490m/s ) acceleration (tested in 6 right angled directions, with 3 shocks in each direction) 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: Wave Soldering (PC version): See Profile B in Supplement section. Manual Soldering: See Prolfi e B in Supplement section. Cleaning: These devices are not process sealed. Hand clean locally using alcohol based solution. See Cleaning Specifications in Supplement section. Standards & Certifications Flammability Standards: UL94V-0 case & base 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 single and double pole models recognized at 3A 125V 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. Single pole models with PC, solder lug, or Wirewrap terminals & double pole with PC or Wirewrap terminals certified at 3A 125V AC or 0.4VA 28V maximum. C96 www.nkk.com Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers TogglesSnap-Action Pushbuttons Series MB2400 Distinctive Characteristics Snap-acting mechanism gives smooth actuation, short stroke, light touch, and audible feedback. This mechanism also provides long mechanical life. C High torque bushing construction prevents rotation or separation from frame during installation. Antijamming design protects contacts from damage due to excessive downward force on the actuator. Compatible companions with M series toggles. Body, bushing, and footprint dimensions ideal for mounting MB2400 pushbuttons and M toggles next to one another. Stainless steel frame resists corrosion. Longer center solder lug terminal simplifies wiring and soldering. Silver contacts of specially composed alloy for hardness. Epoxy sealed terminals prevent entry of solder flux and other contaminants. Prominent external insulating barriers increase insulation resistance and dielectric strength. Bushing Mount Page C98 Actual Size Bracket PC Mount Page C102 Snap-in Mount Page C108 www.nkk.com C97 Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles