TH1 Series - Delay On Make Timer

Littelfuse Delay on Make Relays
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The TH1 Series is a solid-state relay and timer combined into one compact, easy-to-use control. This highly reliable device eliminates the need for a separate solid-state relay. When mounted to a metal surface, it can switch load currents up to 20A steady state, and 200A inrush.

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

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Storage Temperature (F/C)Time Delay RangeSample CapableCompare
TH1B633230VACNO open during timing-40° to 85°C (-40°F to 185°F)2 - 180s on-board adjustableNo
TH1C415120VACNO open during timing-40° to 85°C (-40°F to 185°F)5s fixedNo
TH1C621230VACNO open during timing-40° to 85°C (-40°F to 185°F)0.1 - 3s externally adjustableNo