What it is and what it does
The Siemens 3RV1353-6FP10 is a SIRIUS molded-case circuit breaker (MCCB) designed specifically for starter combinations — it integrates overcurrent and short-circuit protection in a single 3-pole unit with magnetic releases. Rated at 5 A continuous and delivering 5 A in AC-3 duty at 400 V, it handles motor loads up to 2.2 kW at 400 V. The breaking capacity is 85 kA at 400 V AC, dropping to 10 kA at 690 V — so at typical 400 V distribution, it clears high fault currents without upstream coordination issues. Mounts via screw fixing in any position, with IP20 finger-safe touch protection on the front. Screw-type terminals on both main and auxiliary circuits — standard for panel wiring.
Key ratings and what they mean for fit
The 85 kA breaking capacity at 400 V AC means this breaker can safely interrupt faults up to that level without cascading upstream — critical for panel SCCR compliance. At 690 V the capacity drops to 10 kA, so verify the available fault current at your service voltage. The 5 A AC-3 rating governs motor switching: it matches the inrush and breaking duty of a small motor starter combination. The 15 operations per hour maximum is a thermal limit for repetitive starting — fine for occasional cycling, not for high-speed jogging. Dimensions are 130 mm high, 90 mm wide, 70 mm deep — fits standard 90 mm wide MCCB slots. Zero clearance required at the back and sides for heat dissipation, simplifying panel layout.