ABB VM750H mechanical interlock unit designed for ABB AF400 to AF1250 block contactors, providing safe mechanical interlocking for industrial motor control and switching systems.
£57.01
The ABB VM750H (1SFN035700R1000) is a genuine mechanical interlock unit designed to provide safe mechanical interlocking between two horizontally mounted ABB power contactors. As part of ABB's premium range of contactor accessories, it prevents both contactors from closing simultaneously, making it an essential safety component for reversing starters, changeover systems and other industrial motor control applications.
Engineered to ABB's exacting quality standards, the VM750H delivers reliable mechanical operation without requiring an electrical interlock. Its robust construction and precision design ensure dependable performance in demanding industrial environments while simplifying the design of safe motor control circuits.
Designed specifically for ABB AF400 to AF1250 contactors, the VM750H enables safe horizontal mounting of two AC or DC operated contactors with the same or different ratings according to ABB application guidelines.
Mechanical interlock units provide a reliable method of preventing two contactors from closing simultaneously. They are commonly used in reversing motor starters, transfer systems and other applications where mutually exclusive contactor operation is essential for equipment protection and operator safety.
The ABB VM750H has been specifically designed for larger AF series contactors, providing precise operation, dependable mechanical performance and long service life in demanding industrial installations.
| Series | VM Mechanical Interlock Units |
|---|---|
| Part number | 1SFN035700R1000 |
| Product type | Mechanical interlock unit |
| Accessory type | Contactor interlock mechanism |
| Mounting orientation | Horizontal |
| Compatible contactors | AF400, AF460, AF580, AF750, AF1250 |
| Suitable product class | Block contactors |
| Terminal type | Screw terminals |
| Dimensions (W × H × D) | approx. 123.8 × 70 × 52 mm |
| Weight | approx. 0.2 kg |
| EAN | 7320500222102 |
| Standards | CE, UKCA, cULus compliant |
The VM750H mechanically interlocks two compatible ABB contactors, preventing them from closing at the same time.
It is designed for horizontally mounted ABB AF400 to AF1250 contactors.
Yes. The VM750H is suitable for both AC and DC operated ABB contactors.
A mechanical interlock prevents simultaneous contactor operation, improving safety and protecting motors and electrical equipment in reversing and changeover applications.
Yes. The VM750H (1SFN035700R1000) is an original ABB mechanical interlock unit designed specifically for compatible AF series contactors.
ABB mechanical interlock units are trusted by panel builders, automation engineers and industrial maintenance professionals for delivering safe, reliable operation and dependable performance in industrial motor control applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...