The Omron H5CN-YBN DC12-48 is an on-delay mechanical relay timer from the H5CN series. It switches a single-pole double-throw (SPDT, 1 Form C) contact rated at 3 A at 250 VAC, so it handles pilot-duty loads like contactor coils, solenoid valves, and indicator lamps inside a panel. The delay range covers 0.001 second to 99.99 seconds, set via up/down digit keys on the front face. Timing starts when supply voltage (12 to 48 VDC) is applied — no separate trigger signal needed.
The relay body is socketable — it plugs into an 8-pin octal socket (standard 8-pin round base). That means you can swap the timer without pulling wires; the socket stays on the DIN rail or panel. Termination style is plug-in, 8 pin (octal).