ABB 1SFN035403R1000 VM370/400H mechanical interlock unit designed to prevent simultaneous operation of compatible ABB contactors in industrial control systems.
£104.83
The ABB 1SFN035403R1000 is a robust mechanical interlock unit designed to provide safe and reliable interlocking between ABB contactors in industrial motor control systems. As part of the ABB contactor accessory range, the VM370/400H prevents two mechanically linked contactors from closing simultaneously, helping protect electrical systems and improve operational safety.
This mechanical interlock is engineered for use with ABB AF and AX contactors and provides a dependable solution for reversing starters, changeover applications and other motor control arrangements where electrical and mechanical interlocking is required. Its compact construction enables straightforward installation between compatible contactors.
The ABB 1SFN035403R1000 VM370/400H is suitable for interlocking AF265, AF305, AF370, AX260, AX300 and AX370 contactors with AF400 or AF460 contactors, providing reliable mechanical prevention of simultaneous contactor operation in industrial control applications.
Mechanical interlocks are essential components in industrial contactor assemblies where two contactors must not be energised at the same time. They provide a physical locking function that complements electrical interlocking circuits for improved system safety and reliability.
The ABB VM370/400H is designed for demanding industrial applications, providing a dependable mechanical connection between compatible contactors in motor reversing, transfer and changeover control systems.
| Manufacturer | ABB |
|---|---|
| Series | AF Contactors Accessories |
| Model | VM370/400H |
| Product code | 1SFN035403R1000 |
| Product type | Mechanical interlock unit |
| Suitable for | AF265, AF305, AF370, AX260, AX300, AX370, AF400 and AF460 contactors |
| Mounting type | Contactor mounted accessory |
| Height | 60 mm |
| Width | 160 mm |
| Depth | 97 mm |
| Weight | approx. 0.1 kg |
The ABB 1SFN035403R1000 VM370/400H is a mechanical interlock unit used to prevent simultaneous operation of compatible ABB contactors.
The VM370/400H is designed for interlocking AF265, AF305, AF370, AX260, AX300 and AX370 contactors with AF400 or AF460 contactors.
No, the ABB 1SFN035403R1000 mechanical interlock unit does not include auxiliary contacts.
The unit is installed between compatible ABB contactors in industrial control panels and motor starter assemblies.
A mechanical interlock prevents two contactors from closing at the same time, improving safety and protecting electrical equipment in control systems.
ABB mechanical interlock units provide reliable protection for industrial contactor systems, supporting safe motor control, reversing applications and dependable automation operation.
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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...