1-120 second off-delay in an SPDT package
The H3DK-HCL AC100-120V sits in Omron's H3DK-H series as a multi-function off-delay timer, built around an SPDT (1 Form C) mechanical relay and wired with screw terminals on a DIN rail footprint that drops into a standard control-cabinet row. Its timing range covers 1 second to 120 seconds, adjusted through a screwdriver slot on the front face, and the timing initiate method is input voltage — power on the timer and the output changes state when the preset interval expires, the canonical off-delay behaviour used for fan rundown, hold-open doors, and post-stop lube pulses.
Supply and contact rating
Coil supply is 100 VAC to 120 VAC, matching the common North-American control-transformer secondary, so the timer bolts straight into a 120 V control circuit without an interposing relay. Output contacts are rated 5 A at 250 VAC — a mechanical-relay figure that comfortably handles solenoid coils, small motor starters, and indicator lamps, and that becomes the load ceiling the integrator has to respect when the timer is sequencing more than a relay coil downstream.