The Omron H3Y-2 AC100-120 30S is a socket-mount time delay relay from the H3Y series, offering both off-delay and on-delay functions with a hand-dial-adjustable window of 1 second to 30 seconds. Supply is 100-120VAC, and the DPDT (2 Form C) output contacts are rated 5A at 250VAC — enough for pilot duty, small contactor coils, or signal interposing in a control panel.
The 5A @ 250VAC contact rating is resistive (AC-1 class); derate for inductive motor or solenoid loads. The 100-120VAC supply coil is tapped for standard North American control voltages — verify your panel's control transformer taps before wiring. The socketable plug-in termination means the relay body pulls out for replacement without disturbing panel wiring, provided the matching socket (Omron PYF-08A or equivalent) is already in the rail.