What it is and what it does
The Siemens 3RV1353-6DP10 is a SIRIUS molded-case circuit breaker (MCCB) designed specifically for starter combinations — the overload relay and contactor sit downstream, and this MCCB provides the short-circuit protection ahead of them. Rated current is 3.2 A continuous; the magnetic release trips at a fixed 13 × In (roughly 41.6 A) for short-circuit protection, non-adjustable. Breaking capacity hits 85 kA at 400 V AC, which means it can safely interrupt a fault current up to that level without welding its contacts or cascading the arc upstream — critical for panel SCCR compliance under IEC 60947-2.
Key ratings and what they mean for your panel
Three poles for the main current circuit, all screw-type terminals on the front side. The IP20 finger-safe front cover protects against accidental contact during commissioning — mount it in a panel with a door or enclosure that provides the rest of the IP rating. Dimensions are 70 mm deep × 90 mm wide × 130 mm high, so it fits a standard 90 mm-wide DIN-rail footprint (screw fixing, not snap-on). Operating temperature range is -25 to +70 °C, storage and transport -40 to +70 °C, which covers most industrial environments short of foundry heat. Shock resistance is 12 g for 11 ms — rated for machine-mounted applications with moderate vibration.
Breaking capacity across voltage levels
The 3RV1353-6DP10 delivers 100 kA at 240 V AC, 85 kA at 400 V AC, 50 kA at 500 V AC, and 10 kA at 690 V AC. The 85 kA at 400 V is the headline number for most European industrial panels (400 V three-phase). At 690 V the capacity drops to 10 kA, so verify your fault-current study if the panel feeds a 690 V motor circuit — this breaker is still rated for that voltage but the interrupting ability is lower. Surge voltage resistance is 8 000 V, which covers typical transient overvoltages in industrial distribution.