ABB 1SFN034403R1000 VM140/190 Mechanical Interlock Unit Mechanic Interlock for Switch

The ABB VM140/190 Mechanical Interlock Unit (SKU: 1SFN034403R1000) is a certified interlock accessory designed to prevent simultaneous operation of two switches, ensuring safe and reliable switching sequences in industrial control panels and automation systems. Compact and robust, the VM140/190 is engineered to meet demanding industrial standards and integrates seamlessly into ABB switch assemblies.

Technical Specifications

Certifications & Standards

• CE: Complies with European Union safety, health, and environmental protection requirements
• UKCA: UK Conformity Assessed marking for the Great Britain market
• cUL: Canadian UL certification confirming compliance with applicable Canadian safety standards
• RoHS: Restriction of Hazardous Substances — free from restricted hazardous materials per EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation on chemical substances (EC No 1907/2006)
• WEEE: Compliant with the Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal

Applications & Use Cases

• Mechanical interlocking between two adjacent switches to prevent simultaneous closure
• Industrial motor control centres (MCCs) requiring operational safety interlocks
• Control panel assemblies in manufacturing, process automation, and building management systems
• Changeover and transfer switch applications where only one circuit may be energised at a time
• Safety-critical switching sequences in industrial automation and machine control cabinets