Siemens 3RV1431-4BA10 Motor Protection Relay

Siemens Sirius 3RV1431-4BA10 motor protection switch is a compact protection device designed for transformer-protected motor circuits, combining overload and short-circuit protection in a single unit. Housed in a size S2 enclosure, it accepts a nominal current range of 14–20 A, making it suitable for smaller motor loads while maintaining robust fault isolation. The device delivers a 50 kA short-circuit breaking capacity and carries a Class 10 interrupt rating for precise and reliable protection coordination. Wiring is provided via screw-terminal connections, and the unit is offered in the G/050120 E configuration (Version 05), reflecting a specific Siemens catalog setup. As part of the SIRIUS IC10 protection family, the 3RV1431-4BA10 is intended for motor protection with overload relay functionality and transformer protection, offering integrated protection, fast disconnection in fault conditions, and safe isolation in transformer circuits in industrial control panels where space is at a premium.