THD2 Series - Interval Timer

Littlefuse Interval Relays
The THD2 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 THD2 Series timers.


Operation (Interval)
Upon application of input voltage, the time delay begins. The output energizes during the time delay. At the end of the time delay, the output de-energizes and remains de-energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and the output.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Storage Temperature (F/C)Time Delay RangeSample capableCompare
THD2C420120VACNO closed during timing-40° to 85°C (-40°F to 185°F)0.1 - 10s externally adjustableNo
THD2C423120VACNO closed during timing-40° to 85°C (-40°F to 185°F)0.1 - 10m externally adjustableNo
THD2C433120VACNO closed during timing-40° to 85°C (-40°F to 185°F)0.1 - 10m onboard adjustableNo
THD2C620230VACNO closed during timing-40° to 85°C (-40°F to 185°F)0.1 - 10s externally adjustableNo
THD2C633230VACNO closed during timing-40° to 85°C (-40°F to 185°F)0.1 - 10m onboard adjustableNo
THD7421A120VACNO closed during timing-40° to 85°C (-40°F to 185°F)1 - 100s externally adjustableNo
THD7621C230VACNO closed during timing-40° to 85°C (-40°F to 185°F)1 - 100s externally adjustableNo