9050JCK plug in timers are designed to provide low cost timing in a plug in housing. This timer has an on delay timing mode. When the input voltage is applied, the time delay begins. Relay contacts change state after time delay is complete. When the input voltage is removed, contacts return to their shelf state. The timing range is fixed at 3 seconds. This timer does not have a knob on the top of the timer. This plug in timer plugs into an 8501NR51 or 8501NR52 relay socket. These relay sockets can be mounted on 35 mm DIN 3 mounting track or directly to a panel. All wiring is made to the relay socket. The DPDT contacts are rated 10 amperes resistive at 120 VAC, 240 VAC and 30 VDC, 3 amperes inductive at 120 VAC, 240 VAC and 30 VDC, 1/3 HP on the NC contacts at 120 VAC and 240 VAC, 1/2 HP on the NO contacts at 120 VAC and 240 VAC. This plug in timer is powered up with 120 VAC / 110 VDC. 9050JCK plug in timers are UL listed when the proper 8501NR relay socket is used, UL component recognized and CSA certified.