The Omron H3Y-2 DC12 5S is a socket-mount mechanical time delay relay from the established H3Y series. It gives you a DPDT (2 Form C) contact set rated at 5A @ 250VAC, with an adjustable off-delay or on-delay window of 0.2 to 5 seconds set by a hand dial on the top.
The 5A @ 250VAC contact rating covers pilot-duty and small-load switching — think contactor coils, signal lamps, solenoid valves, or PLC digital inputs. It is not sized for motor starting; the DPDT form C contacts are meant for control circuits, not power. The 0.2 to 5 second adjustment range, set by a hand dial on the relay top, suits short-interval sequencing like a conveyor start-delay or a pump-off delay. The 12VDC coil draws about 0.2A from the control supply — verify your power budget if you are running multiple units off a single 12V bus.