The Omron G3NA475BUTU2AC100240 is a G3NA Series solid-state relay rated for 75 A maximum output current when mounted on a heatsink, and 7 A without one. It switches single-phase AC loads in the 200–480 V range, controlled by an AC input of 100–264 V. The photocoupler provides isolation between control and load circuits. Zero-cross switching means the output turns on only when the AC waveform crosses zero volts, reducing inrush current and electrical noise—useful for resistive heater banks or lamp loads where soft start is not required.
The relay is quoted to order; supply is steady through Omron distribution channels. No direct replacement has been announced, so stick with this order code for existing designs.
Surface-mount case, 1.1 in deep, 1.69 in wide, 2.28 in tall. Screw terminals for power and control wiring. The beige housing is finger-safe to IP20 touch protection. Heatsink is not included. For 75 A continuous load, bolt the relay to a properly sized heatsink with thermal compound. Without a heatsink, derate to 7 A maximum.