The Omron G3NA-625B-AC100-240 is a solid-state relay from the G3NA Series, switching AC loads via a photocoupler with zero-crossing turn-on. Rated 25 A maximum output current when mounted to a suitable heatsink, and 4 A without one — so if you're bolting this into a panel without a heatsink, you're limited to 4 A continuous. Input coil draws 17.4 to 35 A at 100-240 VAC, switching loads from 400 to 600 VAC.
Surface-mount style with screw terminals — no DIN-rail clip, so plan for a panel or subplate. Body dimensions are 2.28 in deep by 1.69 in wide by 1.18 in tall, beige case. Finger-safe design means the terminals are shrouded enough to keep wandering tools off live connections. The LED indicator on the front gives you a quick visual on coil status, which helps when you're tracing a no-fire condition on the route.
Approvals and environmental range
CE, CSA, and UL listed — covers the major North American and European regulatory gates. Operates from -22 °F to 176 °F ambient, with insulation resistance rated at 100 megaohm. That temperature span is fine for most indoor industrial panels, but if you're mounting near a hot bearing housing or a steam line, keep the ambient under that 176 °F ceiling.