THDS Series - Single Shot Timer

Series: THDS
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The THDS Series combines accurate timing circuitry with high power solid-state switching. It can switch motors, lamps, and heaters directly without a contactor. You can reduce labor, component cost, and increase reliability with these small, easy-to-use THDS Series timers.


Operation (Single Shot)
Input voltage must be applied before and during timing. Upon momentary or maintained closure of the initiate switch, the output energizes for a measured interval of time. At the end of the delay, the output de-energizes. Opening or reclosing the initiate switch during timing has no affect on the time delay. The output energizes if the initiate switch is closed when input voltage is applied.
Reset: Reset occurs when the time delay is complete and the initiate switch is opened. Loss of input voltage resets the time delay and output.

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Storage Temperature (F/C)Time Delay RangeDimensionsStockSamplesCompare
THDS410.25SA120 V acNO - closed during timing-40° to 85°C (-40° to 185°F)0.25 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
THDS431C120 V acNO - closed during timing-40° to 85°C (-40° to 185°F)1 - 100 s onboard adjustable2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
THDS610.25SA230 V acNO - closed during timing-40° to 85°C (-40° to 185°F)0.25 s fixed2 H x 2 W in. (50.8 x 50.8 mm)CheckOrder
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