Series FB & SB Momentary Pushbuttons
General Specifications
FB Series SB Series
Electrical Capacity (Resistive Load)
3A @ 125V AC or 2A @ 250V AC or
Power Level: 500mA @ 125V AC for silver
2A @ 30V DC for silver
Logic Level: 0.4VA max. @ 28V AC/DC max. for gold
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0.4VA max. @ 28V AC/DC max. for gold
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Note: Find additional explanation in
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
30,000 operations minimum
Mechanical Life: 50,000 operations minimum
10,000 operations minimum
Electrical Life: 50,000 operations minimum
4.90N
Nominal Operating Force: 2.16N
Normally Open
Travel: Pretravel .043 (1.1mm)
Total Travel .088 (2.24mm)
Overtravel .022 (0.57mm)
Normally Closed
Total Travel .065 (1.67mm)
Total Travel .088 (2.24mm)
Materials & Finishes
Plunger: Polyacetal Black: Phenolic resin
Red: Urea formaldehyde 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 - Recognized only when File No. E44145 - Recognized only when ordered
with marking on switch.
ordered with marking on switch.
Add /U or /CUL before dash in part Add /U or /CUL before dash in part number to
order UL recognized switch.
number to order UL recognized switch.
Models rated 0.5A @ 125V AC Single pole; Models rated 3A @ 125V AC & 2A @ 250V AC.
Single pole: Momentary action circuit with solder lug
Momentary action circuit with solder lug
terminations. terminations.
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.
SB series rated 3A @ 125V AC & 2A @ 250V AC.
Single pole: Momentary action circuit with solder lug
terminations.
C38 www.nkkswitches.com
7/30/18
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.
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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.
FB15ANEP and SB4011NO models have epoxy sealed
terminals.
Actual Size FB Actual Size SB
FB Bushing Mount Page C40
SB Bushing Mount Page C42
www.nkkswitches.com C39
Supplement Accessories Indicators Touch Tilt Tactiles Slides Rotaries Keylocks Programmable Illuminated PB Pushbuttons Rockers Toggles