The Siemens SIRIUS 3RV1041-4JA10-ZX95 is a motor protection circuit breaker rated for 63 A continuous current and 30 kW at 400 V AC, with a Class 10 trip characteristic. It is designed for motor protection in main current circuits, with screw-type box terminals for the main circuit and separate screw terminals for auxiliary/control wiring. The breaker includes phase failure detection but no ground fault detection.
Breaking capacity and duty cycle
Breaking capacity varies with system voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, 12 kA at 500 V AC, and 6 kA at 690 V AC. The maximum operating frequency in AC-3 duty is 15 operations per hour, which governs motor starting cycles — not continuous switching. Power dissipation at rated current is 34 W total (11.3 W per pole) in hot operating state, a figure to include in panel thermal calculations.
Dimensions are 70 mm wide, 165 mm high, 174 mm deep. Zero clearance required at the back or sides. Any mounting position is permitted.
Main circuit terminals accept solid conductors 2x (2.5 to 16 mm²) or stranded 2x (10 to 50 mm²) and 1x (10 to 70 mm²). Finely stranded with core-end processing: 2x (2.5 to 35 mm²) or 2.5 to 50 mm². AWG equivalents for main contacts: 2x (10 to 1), 1x (10 to 2). Auxiliary and control circuit terminals are screw-type. An auxiliary switch can be added via the product extension.