The Siemens 3RF3150-1AA02 is a 1-pole solid-state relay from the SIRIUS 3RF31 family, packing 50 A continuous rating into a 22.5 mm DIN-rail housing. The control voltage range of 24-230 V AC / 24 V DC means it accepts both AC and DC control signals across a wide band, simplifying panel wiring when the PLC output voltage isn't fixed.
The 22.5 mm width matches the SIRIUS compact footprint, so it occupies the same slot width as a contactor or overload relay in the same family. Screw terminals accept up to 4 mm² conductors — no special tooling needed for panel wiring.
RoHS compliant since 15 January 2024. No UL or CSA listing is stated in the available documentation; verify with the full manufacturer certificate if your site requires a third-party mark.