SIRIUS 3RV1353-6HP10 — MCCB for Motor Starter Combinations
The Siemens 3RV1353-6HP10 is a SIRIUS molded-case circuit breaker (MCCB) designed specifically for starter combinations, providing overcurrent and short-circuit protection for motor branch circuits. It carries a continuous current rating of 8.5 A and delivers a breaking capacity of 85 kA at 400 V AC, which means it can safely interrupt fault currents up to that level without cascading upstream — critical for maintaining selectivity in a distribution panel. The 3-pole unit uses a magnetic overcurrent and short-circuit release, so it trips instantaneously on high faults, not thermally; this suits motor starting inrush where a thermal delay would nuisance-trip.
Breaking Capacity and Coordination
Breaking capacity varies by voltage: 100 kA at 240 V, 85 kA at 400 V, 50 kA at 500 V, and 10 kA at 690 V AC. At 400 V, the 85 kA rating exceeds typical industrial service-entrance fault levels, giving headroom for high-fault installations like large transformer secondaries or generator paralleling. The rated impulse withstand voltage of 8000 V (surge voltage resistance) supports coordination with upstream surge arrestors in environments with switching transients.
Mounting and Integration
Fastened by screw fixing, not DIN-rail snap-on — plan for panel cutouts or a mounting plate. Dimensions are 90 mm width, 130 mm height, 70 mm depth, with zero clearance required at the back and sides, so it can be packed tightly against adjacent devices. Mounting position is any orientation, which simplifies layout in crowded enclosures. Screw-type terminals on both main and auxiliary/control circuits, arranged on the front side for accessible wiring.
Environmental and Protection Ratings
Front face is IP20 (finger-safe touch protection per the spec), suitable for enclosed panels where operators may access the front. Operating temperature range is -25 to +70 °C; storage and transport tolerate -40 to +70 °C. Shock resistance is 12 g for 11 ms — robust enough for installation on vibrating machinery or in mobile equipment. Installation altitude limited to 2000 m above sea level without derating.