The Siemens 3RF3150-2AA26 is a 1-pole SIRIUS 3RF31 solid-state relay rated for 50 A continuous load current, with a switching voltage range of 48-600 V AC. The control coil is 110-230 V AC. It comes in a 22.5 mm wide housing with spring-loaded terminals, designed to be mounted on a cooling surface to dissipate heat.
The 50 A rating is the continuous load current the SSR can handle with proper heatsinking. Because it's a semiconductor relay, it switches without mechanical contacts, so it's suited for high-cycle applications like temperature control or motor starting where contact wear is a concern. The 48-600 V range covers common industrial voltages from 48 V control circuits up to 480/600 V motor feeds. The 22.5 mm width matches standard DIN-rail component spacing, but note this relay requires a cooling surface — it doesn't dissipate full rated current free-air. Panel builders should budget for a metal backplate or dedicated heatsink.
RoHS compliant since 15 January 2024. No export restrictions under German AL or US ECCN (AL: N / ECCN: N). The product family documentation includes the standard Siemens declaration of conformity; no separate UL or IEC listing is on this record, but the SIRIUS 3RF series typically carries cULus and CE marks — verify the specific nameplate for your jurisdiction.
Mounts on a cooling surface — the 22.5 mm width means it fits alongside other SIRIUS components on the same DIN rail, but the relay body must be thermally coupled to a metal panel or heatsink to reach 50 A. The packaging dimensions (104 x 44 x 48 mm) give the outer carton size, not the relay itself.