Siemens 3RV1031-4EB10 Molded Case Circuit Breaker

Siemens 3RV1031-4EB10 is a three-pole Sirius molded‑case circuit breaker (MCCB) sized S2, designed for motor protection in control panels and motor feeders, with an adjustable overload release in the 22–32 A range (A‑release) and a fixed instantaneous release rated up to 416 A (N‑release). It is rated for up to 690 V at 50 Hz and provides Class 20 thermomagnetic protection with a standard breaking capacity of 50 kA at 400 V, making it suitable for demanding motor starting and protection applications. Main connections use front‑side screw terminals, supporting conductor cross sections of 2x0.75–16 mm² (solid) or 2x0.75–25 mm² (stranded), with regional variants for AWG conductors; an auxiliary switch option is available for integrated control. The package measures 55 mm in width and 149 mm in depth and weighs about 2.38 lb, aligning with Siemens’ Sirius S2 devices. In catalogs, this model is listed as part of the Sirius 3RV family with a documented successor entry to 3RV2031-4EB10, reflecting its role as a motor-protection MCCB within modern industrial control schemes.