Siemens 3VA9277-0FK31 Door-Coupling Rotary Operating Mechanism for 3VA Circuit Breakers

The Siemens 3VA9277-0FK31 is a door-coupling rotary operating mechanism designed for use with 3VA molded-case circuit breakers. It provides external operation of the breaker when installed inside an enclosure, improving safety and accessibility.

This mechanism allows the circuit breaker to be switched on and off from the front of a cabinet door while maintaining electrical isolation and protection. It ensures that the door remains closed during operation, reducing exposure to live parts and increasing operator safety.

The 3VA9277-0FK31 is built from durable materials and engineered for precise alignment with the 3VA series. It offers smooth mechanical movement, a long service life, and reliable performance under demanding industrial conditions.

Ideal for control panels, switchboards, and distribution enclosures, this rotary handle system ensures compliance with industrial safety standards and simplifies daily operation. It’s a practical, dependable accessory for professionals who value safety, efficiency, and ease of use in power distribution systems.