The Omron H3Y-2 AC100-120 1S is a socketable time delay relay from the H3Y series, offering both off-delay and on-delay functions with a 0.1 to 1 second range set by a hand dial. It switches a DPDT (2 Form C) contact set rated at 5A at 250VAC — enough for pilot duty, small motor starters, or signal lamps in a control panel. The 100–120 VAC coil means it drops straight into a standard North American control voltage circuit without a transformer tap.
The hand-dial timing adjustment lets you fine-tune the delay on site — useful when commissioning a conveyor interlock or a pump-off timer where the exact interval is set during startup, not specified at order time.