1SFN030300R1000

The ABB VM19 Mechanical Interlock Unit is designed for applications using two compatible ABB AF contactors of equal frame size. Installed as part of the contactor arrangement, its mechanical action prevents one contactor from closing while the other remains closed. This helps avoid simultaneous operation in switching circuits where the contactors must operate one at a time.

Identified by ABB part number 1SFN030300R1000, the VM19 is listed for use with AF116–AF370 contactors. It is intended for contactors of the same frame size, so confirm the exact contactor models and mounting requirements against ABB’s product information before purchase or installation.

Ahmedabad Electric Corporation supplies ABB switchgear and automation products and can help check availability and compatibility for your application.