The Omron G3PA430BVDDC1224BYOMZ is a solid state relay in the G3PA series, a DIN-rail-mount SSR with a single-pole normally-open contact rated for 30 A continuous load current at up to 440 VAC. Zero-cross switching reduces inrush on resistive and lightly inductive loads, which matters when the relay drives heaters or lamps in a panel where you want to keep EMI low and contactor noise off the line. Control voltage spans 9.6 to 30 VDC, so it triggers cleanly from a 12 V or 24 V PLC output without a dropping resistor. The 500 mA minimum load current means it will not drop out on low-signal applications; keep that floor in mind if you are switching a pilot lamp or a small solenoid.
The 47 mm wide body clips onto a standard DIN rail. At 100 mm tall and 100 mm deep, it leaves room for a finger-safe cover or an adjacent terminal block.