Series MB2000 Miniature Pushbuttons 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. C 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 (1.10mm) .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: 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 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 .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. C72 www.nkk.com Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers TogglesMiniature Pushbuttons Series MB2000 Distinctive Characteristics Guide interlocked with actuator block prevents window locking and maintains correct plunger alignment to assure contact stability. Employs an over-center actuator mechanism, which diminishes C sparking and increases operating life in AC circuits. High torque bushing construction prevents rotation or separation from frame during installation. Splashproof option (D3 and B3 bushing codes) features an o-ring within the bushing and one under the face nut to protect from splashed, sprayed, or spilled liquids. High insulating barriers, formed in the molded diallyl phthalate case, increase isolation of circuits in multipole devices. Prominent external insulating barriers increase insulation resistance and dielectric strength. Epoxy sealed terminals prevent entry of solder flux and other contaminants. Clinching of the frame to the case well above the base and terminals provides 1,500V dielectric strength. Bushing Mount Page C74 Actual Size Bracket PC Mount Page C80 Large Bushing Page C87 www.nkk.com C73 Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles