The 3RA2120-1FA24-0AK6 is a Siemens SIRIUS non-fused load feeder — a factory-assembled direct starter combining a contactor and a circuit-breaker in one S0-size package. It ships with the 3RT2024-1AK60 contactor and the 3RA2921-1AA00 link module already integrated, so it arrives as a single unit ready for DIN-rail mounting. Rated for AC-3 duty up to 690 V, it delivers 1 500 W at 400 V and 3 000 W at 690 V, with corresponding current draws of 4.8 A at 480 V and 4.55 A at 600 V.
Panel integration and mounting constraints
Mounts vertically on 35 mm standard DIN rail via screw and snap-on fastening. The envelope is 45 mm wide, 193.1 mm high, and 97.1 mm deep — the S0 footprint fits alongside other S0 components in a structured panel layout. Clearance distances: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards. These are the minimum air gaps to adjacent metalwork or enclosures for heat dissipation and arc containment — respect them in the panel layout to keep the unit within its thermal envelope. The pollution degree is 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation), which is standard for industrial control panels without sealed enclosures.
Environmental limits and operating range
Operates from -20 to +60 °C ambient; storage and transport range is -50 to +80 °C. The 60 °C ceiling is the limiting factor for panel internal temperature — if the enclosure ambient exceeds that, derating or forced ventilation is needed.