What this SSR delivers
The Omron G3PA-420B-VD is a panel-mount solid state relay switching 0.5 to 30 A at 30°C across a load voltage range of 180 to 440 VAC (50/60 Hz). The 30 A figure is the thermal limit at 30°C ambient — derate for higher panel temperatures. Input side accepts 12 to 24 VDC (operating range 9.6 to 30 VDC) and draws 7 mA max, so it loads a PLC or controller output lightly. The 37 mm width and 100 mm depth fit a standard DIN-rail footprint, leaving room alongside contactors or terminal blocks in a control cabinet. Rated inrush of 220 A (60 Hz, 1 cycle) means it can handle the cold-filament surge of incandescent lamps or transformer primaries without immediate failure.
The 0.5 to 30 A load current at 30°C covers motor starters, heater banks, and lamp loads up to that thermal limit. The 180 to 440 VAC load voltage range suits three-phase systems at 200, 230, 400, or 415 VAC line-to-line. Input must-operate voltage is 9.2 VDC max; release voltage is 1 VDC min — so a 12 VDC or 24 VDC control signal is reliable, but a marginal 9 VDC supply may not hold it closed.