FS491 - FS400 Series

Series: FS400 Questions? Contact Littelfuse Support
Littelfuse Flashers
The FS400 Series is a low leakage AC flasher designed to control LED, or resistive loads. This series offers a solid state output and may be ordered with an input voltage of 24 V to 240 V AC, in two ranges. It offers a factory fixed flash rate of 75 flashes per minute or may be ordered with a fixed custom flash rate ranging from 45 to 150 flashes per minute. The FS400 is the perfect solution for LED lamp flashing.OperationUpon application of input voltage, the output energizes and the ON time begins. At the end of the ON time, the output de-energizes and the OFF time begins. At the end of the OFF time, the output energizes and the cycle repeats as long as input voltage is applied.

Reset: Removing input voltage resets the output and the flash sequence.
Property (Mouseover for details) Value
Input Voltage (V) 120 to 240VAC
Input Tolerance (%) ±15%
Input AC Line Frequency (Hz) 50/60Hz
Humidity 95% relative non-condensing
Output Voltage Drop (V) 2V typical
Output Load Type LED or resistive
Output Form Bridge rectifier FET
Output Load Rating (VA) 0.5A maximum load rating steady state
Flash Rate (fpm) Fixed at 75FPM ±20%
On/Off Ratio (%) ≅50%
Circuitry Encapsulated
Inush 5A
Open State Leakage Current (A) 250uA
Surge Protection IEEE C62.41 - 1991 Level A
Operating Temperature -20° to 60° C (-4° F to 140° F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Mounting Method Surface mount with one #10 (M5 x 0.8) screw
Dimensions 1.50 x 0.94 in. (38.1 x 23.9mm)
Weight (lbs/g) ≌1.1oz (31g)
Sample capable No