Snap-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. 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. Actual Size NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07 Snap-Action Pushbuttons Series MB2400 General Specifications Electrical Capacity (Resistive Load) Power Level (code W): Logic Level (code G): Logic/Power Level (code A): Other Ratings Contact Resistance: Insulation Resistance: Dielectric Strength: Mechanical Life: Electrical Life: Nominal Operating Force: Travel Materials & Finishes Plunger: Bushing: Frame: Case: Base: Movable Contactor: Movable Contacts: Stationary Contacts: Terminals: Environmental Data Operating Temp Range: Humidity: Vibration: Shock: Installation Mounting Torque: Cap Installation Force: Soldering: Cleaning: Standards & Certifications Flammability Standards: UL & C-UL Recognized: R CSA Certified: 3A @ 125V AC 0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V) Combines W & G ratings Note: Find additional explanation of dual rating & operating range in Supplement section. 20 milliohms maximum for silver; 30 milliohms maximum for gold 1,000 megohms minimum @ 500V DC 1,000V AC minimum between contacts for 1 minute minimum; 1,500V AC minimum between contacts & case for 1 minute minimum 200,000 operations minimum 25,000 operations minimum for silver; 100,000 operations minimum for gold Single pole 2.45N; double pole 3.92N Pretravel .024” (0.6mm); Overtravel .016” (0.4mm); Total Travel .039” (1.0mm) Brass with nickel plating Brass with nickel plating Stainless steel Polybutylene terephthalate (PBT) Diallyl phthalate resin Phosphor bronze with silver or gold plating Silver alloy (code W); copper with gold plating (code G); or silver alloy with gold plating (code A) Silver alloy with silver plating (code W); copper or brass with gold plating (code G); or silver with gold plating (code A) Copper or brass with silver plating; copper or brass with gold plating –30°C through +85°C (–22°F through +185°F) 90 ~ 95% humidity for 96 hours @ 40°C (104°F) 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 50G (490m/s2) acceleration (tested in 6 right angled directions, with 3 shocks in each direction) 1.5Nm (13.0 lb • in) for double nut; 0.7Nm (6.0 lb • in) for single nut 80.0N (18.0 lbf) maximum downward force on actuator Wave Soldering (PC version): See Profile B in Supplement section. Manual Soldering: See Profile B in Supplement section. These devices are not process sealed. Hand clean locally using alcohol based solution. See Cleaning Specifications in Supplement section. UL94V-0 available All single and double pole models recognized at 3A @ 125V AC or 0.4VA max. @ 28V DC max; UL File No. WOYR2.E44145; add “/U” to end of part number to order UL mark on switch C-UL File No. WOYR8.E44145; add “/C-UL” to end of part number to order C-UL mark on 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; CSA File No. 023535-0-000; add “/C” to end of part number to order CSA mark on switch. NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07 Snap-Action Bushing Mount Series MB2400 TYPICAL SWITCH ORDERING EXAMPLE E1 11 MB24 61 SPDT DPDT ON (ON) ON (ON) W Silver Rated 3A @ 125V AC G Gold Rated 0.4VA max @ 28V AC/DC max A Gold over Silver Rated 3A @ 125V AC & 0.4VA max @ 28V AC/DC max ( ) = Momentary BUSHINGS E1 .285” (7.24mm) Threaded with D Flat E2 .285” (7.24mm) Smooth with D Flat A1 .280” (7.1mm) Threaded with Keyway A2 .280” (7.1mm) Smooth with Keyway S1 .350” (8.9mm) Threaded with Keyway S2 .350” (8.9mm) Smooth with Keyway 01 CONTACT MATERIALS & RATINGS POLES & CIRCUITS 11 W F A CAPS F .201” (5.1mm) Diameter H .295” (7.5mm) Diameter CAP COLORS A Black B White C Red TERMINALS 01 Solder Lug 03 .250” (6.35mm) Straight PC 05 .425” (10.8mm) Wirewrap 06 .750” (19.05mm) Wirewrap 07 .964” (24.5mm) Wirewrap IMPORTANT: Switches are supplied without UL, C-UL, & CSA markings unless specified. Specific models & ratings noted on General Specifications page. DESCRIPTION FOR TYPICAL ORDERING EXAMPLE MB2411E1W01-FA Black .201” (5.1mm) Diameter Cap SPDT ON-(ON) Circuit Silver Contacts with 3-Amp Rating .285” (7.24mm) Threaded Bushing with D Flat Solder Lug Terminals NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07 Snap-Action Bushing Mount Series MB2400 POLES & CIRCUITS Plunger Position ( ) = Momentary Normal Connected Terminals Down Normal Keyway Throw & Switch Schematics Down Note: Terminal numbers are not actually on the switch. Keyway Pole Model SP MB2411 ON (ON) 1-3 1-2 SPDT DP MB2461 ON (ON) 1-3 4-6 1-2 4-5 DPDT 1 (COM) 3 2 1 (COM) 3 2 4 6 5 BUSHINGS Note: Plunger selection is not required for MB2400 pushbuttons. The plunger can be used with or without a cap. E1 .285” (7.24mm) Threaded with D Flat (0.8) .031 1/4-40 Thd (2.84) Dia .112 (8.0) Dia .315 (8.0) Dia .315 (2.5) .098 (5.54) (7.24) .218 .285 .285” (7.24mm) Smooth with D Flat (8.0) Dia .315 (5.54) (7.24) .218 .285 (5.54) .218 (6.2) Dia .244 (2.84) Dia .112 (8.0) Dia .315 (5.54) (7.1) .218 .280 (0.9) .035 .350” (8.9mm) Smooth with Keyway (0.8) .031 (2.5) .098 (8.9) .350 Maximum Panel Thickness with Standard Hardware: .134” (3.40mm) S2 (6.2) Dia .244 (2.84) Dia .112 (0.9) .035 (2.5) .098 (0.9) .035 .280” (7.1mm) Smooth with Keyway (8.0) Dia .315 (2.5) .098 1/4-40 Thd (2.84) Dia .112 (8.0) Dia .315 Maximum Panel Thickness with Standard Hardware: .068” (1.74mm) (0.8) .031 .350” (8.9mm) Threaded with Keyway (0.8) .031 (2.5) .098 (5.54) (7.1) .218 .280 A2 (6.2) Dia .244 (2.84) Dia .112 S1 1/4-40 Thd (2.84) Dia .112 (0.9) .035 Maximum Panel Thickness with Standard Hardware: .068” (1.74mm) E2 .280” (7.1mm) Threaded with Keyway A1 (2.5) .098 (0.9) .035 (5.54) .218 (8.9) .350 (0.9) .035 Panel Cutouts For A1, A2, S1, or S2 Bushing with Keyway For E1 or E2 Bushing with D Flat (5.6) .220 (6.5) Dia .256 (0.6) .024 (6.5) Dia .256 With Optional Locking Ring (5.8) .228 Standard hardware includes 2 hex nuts & 1 lockwasher. Hardware is illustrated following the Typical Switch Dimension drawings. (6.5) Dia .256 (2.2) Dia .087 (6.5) .256 NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07 Series MB2400 Snap-Action Bushing Mount CONTACT MATERIALS & RATINGS W Silver over Silver Power Level 3A @ 125V AC G Gold over Brass or Copper Logic Level 0.4VA maximum @ 28V AC/DC maximum Note: Complete explanation of operating range in Supplement section. A Power Level or Logic Level Gold over Silver 3A @ 125V AC or 0.4VA maximum @ 28V AC/DC maximum Note: This dual rated option is suitable when two or more identical switches are used in logic and in power circuits within the same application. See Supplement section for complete explanation of dual rating and operating range. TERMINALS 01 Epoxy Seal .250” (6.35mm) Straight PC 03 Solder Lug (4.0) .157 Epoxy Seal (2.0) .079 (2.0) (1.1) .079 .043 Thk = (0.8) .031 (6.35) (4.8) .250 .189 (1.17) .046 Thk = (0.8) .031 (4.8) .189 3 2 (4.7) Typ .185 1 (1.8) Dia Typ .073 Single Pole 3 6 2 5 1 4 (4.7) Typ .185 (1.8) Dia Typ .073 Double Pole 05 .425” (10.8mm) Wirewrap or Extended PC 06 .750” (19.05mm) Wirewrap or Extended PC 07 .964” (24.5mm) Wirewrap or Extended PC Refer to the footprints if using as extended PC terminal. Epoxy Seal A Dimension A = terminal lengths as shown beside the code boxes above. (1.27) .050 Thk = (0.8) .031 CAPS & CAP COLORS F AT475 .201” (5.1mm) Diameter Cap Material: Polyamide H (5.1) Dia .201 (6.4) .253 (4.0) .157 AT496 .295” (7.5mm) Diameter Cap (7.5) Dia .295 (6.4) .253 (4.0) .157 Material: Polyamide Finish: Glossy Finish: Glossy Cap Colors Available: A Black B White C Red NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07 Series MB2400 Snap-Action Bushing Mount TYPICAL SWITCH DIMENSIONS Solder Lug Single Pole (1.1) x (2.0) Typ .043 x .079 (0.8) Typ .031 (2.4) .096 (5.1) Dia .201 (2.84) Dia .112 Flat (13.0) .512 NC (4.7) Typ .185 1/4-40 Thd (6.4) .253 (7.24) .285 (0.9) (4.5) .035 .177 (14.0) .552 3 NO 2 COM 1 (4.0) .157 (2.0) .079 (7.9) .311 MB2411E1W01-FA Solder Lug Double Pole (1.1) x (2.0) Typ .043 x .079 (0.8) Typ .031 (2.4) .096 (5.1) Dia .201 (2.84) Dia .112 Flat (13.0) .512 (4.7) Typ .185 1/40-40 Thd (6.4) .253 (7.24) .285 (0.9) (4.5) .035 .177 (14.0) .552 NC 6 3 NO 5 2 COM 4 1 (4.0) .157 (4.8) .189 (12.7) .500 (2.0) Typ .079 MB2461E1W01-FA HARDWARE Standard Hardware 1/4-40 Thd AT513H Inch Threaded Hexagon Nut (8.0) .315 2 included with each switch AT509 Lockwasher (6.4) Dia (10.2) Dia .252 .402 1 included with each switch Material: Brass with Nickel Plating (9.0) .354 Material: Steel with Zinc/Chromate (1.5) .059 (0.5) .020 Optional Hardware AT507H Locking Ring for A1 or S1 Bushing (6.35) Dia .250 (12.0) Dia .472 (2.0) .079 Material: Steel with Zinc/Chromate Material: Steel with Zinc/Chromate (5.5) or .229 (1.7) .067 AT515 Locking Ring for E1 Bushing (0.8) .031 (6.2) Dia .244 (2.0) .079 (1.68) .066 (5.5) .217 (12.0) Dia .472 (0.8) .031 NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 03-07