Siemens 3RV1031-4GA10 Motor Protection Switch

Siemens 3RV1031-4GA10 is a three-pole Sirius motor protection switch (size S2) designed to protect 3‑phase motors up to 690 V AC-3, with an operating current range of 36–45 A and a rated value of 45 A. It employs a thermal-magnetic release (Class 10) and offers a short-circuit breaking capacity of 4 kA, with an impulse withstand of 6,000 V and IP20 front protection, making it suitable for motor protection assemblies when paired with a compatible Siemens contactor (for example, a 3RT series). The device includes an auxiliary switch and removable terminals for the auxiliary and control circuit, and it features a mechanical service life of about 50,000 switching cycles, with installation altitude rated up to 2,000 m.