Name: FB120A / FB230A Series - Flasher and Incandescent Beacon Alarm Relay
Brand: Littelfuse Inc.

FB120A / FB230A Series - Flasher and Incandescent Beacon Alarm Relay

Series: FB120A / FB230A

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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).

Operation
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.

Access specifications, certifications, check availability and order parts below

Catalog #	Input Voltage (V)	Output Form	Trip Delay Range	Output Load Rating (VA)	Dimensions	Stock	Samples

FB120A	120 V ac	3 total: 1 relay and 2 solid state	Flasher failure: Fixed at 6 s; -0/+40; Lamp failure: Fixed at 10 s; -0/+40%	One isolated SPDT relay rated 5 A resistive; Two solid-state line voltage outputs rated 0.5 A steady and 5 A inrush	3.5 H x 2.5 W in. (88.9 x 63.5 mm)	Check	Order
FB230A	230 V ac	3 total: 1 relay and 2 solid state	Flasher failure: Fixed at 6 s; -0/+40; Lamp failure: Fixed at 10 s; -0/+40%	One isolated SPDT relay rated 5 A resistive; Two solid-state line voltage outputs rated 0.5 A steady and 5 A inrush	3.5 H x 2.5 W in. (88.9 x 63.5 mm)	Check	Order