Industrial 3VF1231-1DG21-0A 3 Pole Shunt Breaker

Siemens 3VF1231-1DG21-0A is a three-pole shunt breaker designed for industrial low-voltage power distribution, offering a 40 A current rating and a 600 V maximum voltage in its referenced configuration. As a molded‑case circuit breaker within the Siemens 3VF family, it provides reliable overcurrent protection for feeders and motor-control circuits in control panels and starter assemblies, with remote tripping achievable through shunt‑release options that integrate with automation sequences. The three-pole format delivers simultaneous interruption across all phases, helping to ensure safe shutdown of circuits under fault conditions in industrial environments where compact, modular protection is required. This variant complements Siemens’ broader line of protection devices, allowing panel builders to match interface, mounting, and accessory configurations to their enclosure specifications and control-system design.