What this MCCB is and what it protects
The Siemens 3RV1353-6MM10 is a SIRIUS molded-case circuit breaker (MCCB) designed specifically for starter combinations — meaning it integrates the overcurrent and short-circuit protection directly into the motor starter assembly, saving panel space over a separate breaker-and-contactor layout. Rated for 32 A continuous current and 690 V maximum, it handles motor loads up to 15 kW at 400 V AC-3 duty, so it's sized for common 30 A motor branch circuits in industrial control panels. The breaking capacity tells you where it can safely interrupt a fault: 100 kA at 240 V, 85 kA at 400 V, 50 kA at 500 V, and 10 kA at 690 V AC — that 85 kA at 400 V is the figure most panel builders will check against the available fault current at the distribution board.
Mounting and integration into the panel
Mounts via screw fixing in any orientation, with 0 mm clearance needed at the back and sides — that means it can sit flush against the panel backplate or adjacent components without derating for airflow blockage, though the IP20 front protection means the front face is finger-safe but the terminals need enclosure coverage. Dimensions are 130 mm high, 90 mm wide, 70 mm deep — a compact footprint that fits standard 90 mm wide DIN-rail-mount enclosures, even though this unit screws directly rather than snapping onto the rail. Main circuit terminals are screw-type on the front side; auxiliary and control circuit terminals are also screw-type. The design accepts an auxiliary switch add-on (not included), and the overcurrent release is magnetic-only — no thermal bimetal, so it's a magnetic-only instantaneous trip for short-circuit protection, relying on the upstream contactor or overload relay for thermal overload.
Environmental limits and compliance
Operates from -25 to +70 °C, stores and ships from -40 to +70 °C, with a maximum installation altitude of 2000 m above sea level. The surge voltage resistance is rated at 8000 V, which covers impulse voltage transients typical in industrial distribution. Shock resistance is 12 g for 11 ms — adequate for most fixed-mount industrial panels but not rated for continuous vibration on moving equipment. The substance prohibition date of 08.01.2008 indicates RoHS compliance per the EU directive effective from that date.