The Omron G3NA-650B-AC100-240 is a single-phase, AC-output solid state relay from the G3NA Series, rated for 50 A maximum output current when mounted on a suitable heat sink, and 6 A without one. The 100-240 VAC control input drives a photocoupler-isolated zero-crossing switch, making it a clean replacement for electromechanical contactors in resistive or lightly inductive AC loads up to 600 VAC.
That is not a typo — it is a 8× difference that catches integrators who spec by the catalog cover. The zero-crossing output means the relay switches on only near the AC voltage zero, minimizing inrush and EMI, which is preferred for heater banks and lamp loads but not for phase-angle control. Output voltage range of 400-600 VAC covers common 480 V three-phase line-to-line or 277/480 V single-phase loads. The 17.4 to 35 A input current draw is the control-side consumption — that is the current the PLC or thermostat output must sink when driving the relay coil.
Surface-mount style with screw terminals — expect to land #8 or #10 ring terminals on the M4 screws. The 2.28 × 1.69 × 1.18 inch body fits a standard 4-inch square box or DIN-rail adapter plate. Finger-safe construction means no exposed live parts at the terminals, which simplifies panel certification. The LED indicator gives a visual on control-power status, useful during commissioning.