Mersen NP40 neutral pole accessory designed for compatible M40 disconnect switches on the 40 A switch platform, providing neutral conductor switching and isolation.
£16.52
The Mersen NP40 is a dedicated neutral pole accessory designed for use with compatible Mersen M40 disconnect switches. It enables the switching assembly to accommodate a neutral conductor, making it suitable for electrical systems that require coordinated isolation of the phase conductors and neutral connection.
Developed for industrial control panels, machinery and power distribution equipment, the NP40 provides a practical way to extend a compatible M40 switch configuration. Its purpose-designed construction helps ensure reliable mechanical integration and consistent switching performance within the assembled disconnect system.
The NP40 is rated for the 40 A M40 switch platform and is supplied as an accessory rather than a complete disconnect switch. It should be selected with a compatible Mersen M40 switch and appropriate operating components to create the required electrical isolation arrangement.
The Mersen NP40 allows a compatible M40 disconnect switch assembly to include a switched neutral pole. This can be required in installations where the neutral conductor must be disconnected alongside the phase conductors for maintenance, servicing or operational isolation.
Because the NP40 is manufactured specifically for the M40 switch platform, it provides the mechanical compatibility required for a compact and coordinated switch assembly. The complete installation should be designed and installed in accordance with the applicable electrical regulations and equipment requirements.
| Manufacturer | Mersen |
|---|---|
| Model | NP40 |
| Product type | Neutral pole accessory |
| Compatible switch range | Mersen M40 switches |
| Compatible current platform | 40 A |
| Pole function | Neutral conductor switching |
| Installation type | Switch-mounted accessory |
| Application | Electrical isolation and disconnect assemblies |
| Supplied as | Neutral pole only |
| Suitable for | Industrial control panels and machinery |
The NP40 is a neutral pole accessory used with compatible Mersen M40 disconnect switches to provide switching or isolation of a neutral conductor.
No. The NP40 is supplied as a neutral pole accessory and must be installed with a compatible Mersen M40 switch assembly.
The NP40 is designed for use with compatible Mersen M40 switches from the 40 A disconnect switch platform.
A switched neutral may be required where the neutral conductor must be isolated alongside the phase conductors during equipment maintenance or servicing.
It is commonly fitted to disconnect switch assemblies inside industrial control panels, machinery cabinets and electrical distribution equipment.
Mersen disconnect switch accessories are used by panel builders, OEM manufacturers and electrical engineers to create compact, dependable isolation assemblies suited to industrial machinery and power distribution 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...