ABB 1SFN035700R1000 VM750H Mechanical Interlock Unit Mechanic Interlock for Switch 123.8x52x70mm

The ABB VM750H (1SFN035700R1000) is a mechanical interlock unit designed to prevent simultaneous operation of two switching devices, ensuring safe and reliable control panel configurations. Horizontally mounted and compact at 123.8 x 52 x 70 mm, the VM750H integrates seamlessly into ABB switch assemblies and is trusted by engineers and panel builders in industrial automation and power distribution applications. Weighing just 0.2 kg, this interlock unit offers a straightforward, robust solution for mutual exclusion switching logic.

Technical Specifications

Certifications & Standards

• REACH: Compliant with EU REACH regulation on chemical substances in electrical equipment
• RoHS: Restriction of Hazardous Substances directive compliant — free from restricted materials
• WEEE: Compliant with Waste Electrical and Electronic Equipment directive for responsible end-of-life disposal

Applications & Use Cases

• Mutual exclusion interlocking between two contactors or switch devices in motor control panels
• Reversing starter circuits requiring mechanical prevention of simultaneous energisation
• Industrial automation control panels where dual-source or changeover switching is employed
• Machine tool and conveyor control systems requiring reliable interlock safety mechanisms
• Panel builders integrating ABB switching devices requiring factory-aligned mechanical interlock accessories

Frequently Asked Questions

• What is the VM750H used for? The VM750H is a mechanical interlock unit that physically prevents two switching devices from being engaged simultaneously, providing a hardware-level safety function in control panels.
• What is the mounting orientation of the VM750H? The VM750H is designed for horizontal mounting.
• What are the dimensions of the VM750H? The unit measures 123.8 mm (W) x 52 mm (D) x 70 mm (H) and weighs 0.2 kg.
• Is the VM750H RoHS compliant? Yes, the ABB VM750H carries REACH, RoHS, and WEEE compliance certifications.