SIRIUS 3RV1031-4BA10-ZX95 — motor-protection circuit breaker, 20 A, Class 10
The Siemens 3RV1031-4BA10-ZX95 is a SIRIUS motor-protection circuit breaker rated for 20 A continuous current and 7.5 kW at 400 V AC, with a Class 10 trip characteristic.
The 20 A continuous rating and 7.5 kW at 400 V define the motor size this breaker protects — a standard 7.5 kW four-pole induction motor on a 400 V three-phase supply. Breaking capacity is 50 kA at 400 V, dropping to 12 kA at 500 V and 5 kA at 690 V. At 240 V it handles 100 kA. In a panel with a 50 kA prospective fault level at 400 V, this breaker clears without upstream fuses — good for a main distribution board feeding motor starters.
Panel integration — DIN rail and wiring
Zero clearance needed at the back or sides, so you can pack breakers tight in a row. The 55 mm width, 140 mm height, and 149 mm depth fit a standard motor-starter slot in a SIRIUS lineup. Screw-type terminals on the main circuit accept 2x (0.75 … 16 mm²) solid or 2x (0.75 … 25 mm²) stranded, plus a single 35 mm² conductor. The auxiliary and control circuit also uses screw terminals.