Omron G5LE-1A-DC12 SPST Relay, 12VDC Coil, Active

The G5LE-1A-DC12: The SPST (form A) contact arrangement means one normally-open set of contacts — it closes when the coil is energized. That is the simplest switching topology: use it for on/off control of a single load like a motor contactor coil, a solenoid valve, or a signal lamp. The 12 VDC coil is rated for continuous duty at that voltage; the relay will pull in reliably at 12 V and drop out below the release threshold (typically around 1.2 V for a 12 V relay, but that is not in the evidence — just standard relay behavior). For a commissioning engineer, verify the coil voltage matches your control supply before wiring; a 24 VDC coil version exists in the G5LE family if your panel runs at 24 V.