FB120A - FB120A / FB230A Series

Littelfuse FB Flasher
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The FB120A and FB230A are used to monitor the operation of one two-lamp incandescent beacon and one beacon flasher (or auxiliary module). The flasher and lamps are monitored by sensing the flow of current in the circuit. If the lamp(s) or the flasher fail to operate properly, a solid-state output and an isolated SPDT relay energize. When connected to a site monitoring system, this unit provides the remote beacon monitoring protection required by the FAA/FCC. On a multiple beacon structure, one unit is required for each two-lamp incandescent beacon (one unit per beacon for LED beacons).

If one lamp in an incandescent beacon fails, the relay and solidstate lamp failure outputs energize after 10s. If the flasher fails in the ON or OFF condition, the relay and the solid-state flasher failure output energizes after 6s. If both failures occur, all three outputs energize after their trip delays.
Note: If both incandescent lamps fail, all three outputs will energize. The relay and solid-state flasher failure output energizes after 6s, and the solid-state lamp failure output energizes after 10s.

Property (Mouseover for details) Value
Input Voltage (V) 120VAC
Input Tolerance (%) ±15%
Input AC Line Frequency (Hz) 50/60Hz
Output Form 3 total - 1 relay 2 solid state
Output Load Rating (VA) One isolated SPDT relay rated 5A resistive; Two solid-state line voltage outputs rated 0.5A steady 5A inrush
Trip Delay Range Flasher failure: Fixed at 6s; -0/+40; Lamp failure: Fixed at 10s; -0/+40%
Lamp Socket Voltage (%) ±10%; 50/60 Hz
Lamp Failure Detection For two 620W or 700W lamps
Indication Lamp failure (Red): LED glows when one or both lamps fail; Flasher failure (Red): LED glows when the flasher fails
Circuitry Encapsulated
Operating Temperature -55° to 60° C (-67° F to 140° F)
Storage Temperature (F/C) -55° to 85°C (-67°F to 185°F)
Mounting Method Surface mount with two #6 (M3.5 x 0.6) screws
Termination Type 7 position barrier block for 20 AWG (0.5mm2) to 14 AWG (2.5mm2) wire
Dimensions 3.50 x 2.50 x 1.75 in. (88.9 x 63.5 x 44.5mm)
Weight (lbs/g) ≌7.0oz (198g)
Sample capable No