The Siemens 8UD1900-2WB00 is a 600 mm extension shaft designed for use with 3VA series door-coupling rotary mechanisms. It allows control of molded-case breakers from a distance – ideal for enclosures where the breaker is mounted behind a cabinet door or recessed panel. The shaft ensures smooth mechanical connection between the external handle and the breaker operating mechanism.

At 600 mm long, this extension shaft helps adapt installations where space or layout demands separation between door handle and breaker. It fits standard 88 mm coupling dimensions used in the 3VA accessory range. The shaft weighs about 266 g and is built for dependable performance in industrial or commercial environments.

This accessory improves safety and convenience by enabling breakers to be operated without direct access – useful in switchboards, control cabinets, or distribution panels. The 8UD1900-2WB00 brings flexibility to system design, keeping technology protected while allowing easy, door-mounted operation.