Littelfuse SSAC HRD9122

The Littelfuse SSAC HRD9122 is a retriggerable single shot timer for 12 V DC, with isolated SPST-NO relay contacts rated 15 A (UL) / 30 A (CSA) general purpose at 125 V AC. Its delay is adjustable from 10 to 1000 seconds with its onboard knob.

A retriggerable single shot (motion detector): with input voltage applied, closing the initiate switch energizes the output and starts the delay; at the end of it the output de-energizes. Reclosing the switch during or after timing resets the delay and restarts timing. Powering up with the switch closed does not energize the output.

Output: 1A SPST-NO relay, 15 A (UL) / 30 A (CSA) general purpose at 125 V AC; 10 A at 240 V AC; 20 A resistive at 30 V DC; 1 hp at 125/240 V AC (isolated contacts). Repeat accuracy: ±0.5% or 20 ms, whichever is greater. Setting accuracy: Factory calibration ±10%; ±2% over temperature and voltage. Reset time: 75 ms. Supply tolerance: -15% / +20% of nominal. Power: 2 W. Life: 1,000,000 operations mechanical.

It is surface mounted and has 0.250 in (6.3 mm) male quick-connect terminals. It operates from -20 to +60 °C and stores from -40 to +85 °C.