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