The Siemens 3RV6311-1FC10 is a SIRIUS circuit breaker designed specifically for starter combinations — meaning it integrates directly into a motor starter assembly, combining short-circuit and overload protection in a single compact device. Size S00 (45 mm wide, 97 mm tall, 96 mm deep) fits standard 35 mm DIN rail per DIN EN 60715, with screw and snap-on mounting and any orientation allowed.
Key ratings and what they mean for fit
Rated operational current is 5 A at AC-3 duty (400 V), which is the motor-switching rating — this breaker is sized for a 5 A motor load under normal starting conditions. The magnetic short-circuit trip responds at 65 A, so it clears a fault before the contactor welds, maintaining coordination in the starter assembly. Rated voltage is 690 V AC-3 maximum, giving headroom for 400 V or 480 V line supplies. Operating frequency 50... 60 Hz, power loss 6 W total typical.
Mounting and integration
Mounts on 35 mm DIN rail (DIN EN 60715) via screw and snap-on — no tools needed for the snap, but the screw terminals (top and bottom) need 0.8... 1.2 N·m torque. Accepts 2x (0.75... 2.5 mm²) solid or stranded, or 2x 4 mm² solid; for AWG, 2x (18 to 12) or 2x (20 to 16). Finely stranded with ferrule: 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²). Clearance: 50 mm upwards, 50 mm downwards, 30 mm at sides — no forward or backward clearance needed (0 mm). Ambient operating temperature -20... +60 °C, storage/transport -50... +80 °C. Installation altitude up to 2000 m.