Series FB & SB Momentary Pushbuttons General Specifications FB Series SB Series Electrical Capacity (Resistive Load) Power Level: 500mA 125V AC for silver 3A 125V AC or 2A 250V AC or Logic Level: 0.4VA max. 28V AC/DC max. for gold 2A 30V DC for silver C (Applicable Range 0.1mA ~ 0.1A 20mV ~ 28V) 0.4VA max. 28V AC/DC max. for gold Note: Find additional explanation in (Applicable Range 0.1mA ~ 0.1A 20mV ~ 28V) Supplement section. Note: Find explanation of operating range in Supplement section. Other Ratings 10 milliohms maximum for silver Contact Resistance: 30 milliohms maximum for silver 20 milliohms maximum for gold 30 milliohms maximum for gold 200 megohms minimum 500V DC Insulation Resistance: 100 megohms minimum 500V DC 1,000V AC minimum between contacts Dielectric Strength: 1,000V AC minimum between contacts & between contacts & case for 1 minute minimum & between contacts & case for 1 minute minimum Mechanical Life: 50,000 operations minimum 30,000 operations minimum Electrical Life: 50,000 operations minimum 10,000 operations minimum Nominal Operating Force: 2.16N 4.90N Travel: Pretravel .043 (1.1mm) Normally Open Overtravel .022 (0.57mm) Total Travel .088 (2.24mm) Total Travel .065 (1.67mm) Normally Closed Total Travel .088 (2.24mm) Materials & Finishes Plunger: Polyacetal Phenolic resin Bushing: Brass with nickel plating Brass with nickel plating Case: Phenolic resin Phenolic resin Movable Contactor: Copper with silver or gold plating Copper with silver or gold plating Stationary Contacts: Phosphor bronze with silver or gold plating Copper with silver or gold plating Terminals: Phosphor bronze with silver or gold plating Copper with silver or gold plating Environmental & Installation Data Operating Temp Range: 10C through +70C (+14F through +158F) 10C through +70C (+14F through +158F) Soldering Time & Manual Soldering: Manual Soldering: Temperature: See Profile A in Supplement section. See Profile A in Supplement section. Standards & Certifications UL: File No. E44145 File No. E44145 Models rated 0.5A 125V AC Single pole Models rated 3A 125V AC & 2A 250V AC. Momentary action circuit with solder lug Single pole: Momentary action circuit with solder lug terminations. terminations. Add /U to end of part number to order UL Add /U to end of part number to order UL mark on mark on switch. switch. Add /CUL to end of part number to order Add /CUL to end of part number to order cULus cULus mark on switch. mark on switch. CSA: File Number: 023535 0 000 SB series rated 3A 125V AC & 2A 250V AC. Single pole: Momentary action circuit with solder lug terminations. Add /C to end of part number to order CSA mark on switch. C38 www.nkk.com Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers TogglesMomentary Pushbuttons Series FB & SB Distinctive Characteristics Optional caps in different colors to vary appearance as needed. C Low operating force for ease of actuation. Rear panel bushing mount with compact behind panel dimension. Internal antijamming feature to protect the contacts from damage due to excessive force on the plunger. Self-cleaning contacts make FB models highly reliable. Low cost device of rugged one-piece bushing and housing construction. Reliability of construction with an internal guide to maintain contact alignment. Epoxy sealed terminals. Actual Size FB Actual Size SB FB Bushing Mount Page C40 SB Bushing Mount Page C42 www.nkk.com C39 Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles