The Siemens 3RV1353-6EP10 is a SIRIUS molded-case circuit breaker (MCCB) designed specifically for starter combinations — meaning it integrates directly into a motor starter assembly, providing short-circuit protection ahead of the contactor and overload relay. Rated at 4 A continuous current with a magnetic overcurrent release set to a non-adjustable 13 x In, this 3-pole unit delivers 85 kA breaking capacity at 400 V AC, which is the figure that governs its SCCR in a 400 V panel. The screw-type terminals on both main and auxiliary circuits (front-side main connection) simplify panel wiring, and the IP20 finger-safe front cover keeps live parts behind the panel door.
Breaking capacity and coordination
The 85 kA at 400 V is the headline number for this MCCB, but the full SCCR curve matters for selectivity studies: 100 kA at 240 V, 85 kA at 400 V, 50 kA at 500 V, and 10 kA at 690 V. At 690 V the breaker still clears 10 kA, which is relevant for 690 V industrial networks common in mining or marine installations. The 1.5 kW motor rating at 400 V (AC-3) gives a quick sizing rule: this breaker pairs with a 1.5 kW, 400 V three-phase motor in a standard DOL starter.
Physical integration
Mounts via screw fixing (not DIN rail) in any position. Dimensions: 130 mm high, 90 mm wide, 70 mm deep — fits standard 90 mm wide MCCB slots in motor control centers. Zero clearance required at the sides and rear for heat dissipation, which simplifies panel layout. Operating temperature range of -25 to +70 °C covers most indoor industrial environments; storage range extends to -40 to +70 °C.