Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.

The WMCUSP440C is a complete 3 phase SPD unit supplied in a durable 8-way IP40 steel enclosure with a pre-fitted 4-pole Type 2 surge protection device and 40A C Curve MCB. It provides a practical ready-to-install solution for installers needing surge protection within a compact three-phase enclosure.

This pre-wired 3 phase surge protection board is suited to commercial distribution systems, EV infrastructure, renewable installations, plant rooms and specialist three-phase applications where coordinated surge protection and upstream overcurrent protection are required in one assembly.

Why Choose a 3 Phase SPD Unit with MCB?

In many commercial and industrial installations, surge protection needs to be added without duplicating existing earth leakage protection already provided elsewhere in the system.

The WMCUSP440C combines a 3 phase surge protection device, upstream MCB protection and steel enclosure in one compact assembly, helping simplify installation and reduce the need to build a separate SPD arrangement manually.

• Complete 3 phase SPD and enclosure assembly
• Suitable for standalone surge protection installations
• Pre-wired to reduce installation time
• Designed for commercial distribution boards and EV infrastructure
• Helps protect sensitive three-phase equipment from transient overvoltages

Key Features

• 3 phase SPD unit – complete surge protection enclosure for three-phase systems
• 4-pole Type 2 SPD – protects against transient overvoltages and switching surges
• 40A C Curve MCB included – upstream overcurrent protection fitted
• 8-way IP40 steel enclosure – compact metal board format
• Pre-wired and tested in the UK – installer-ready assembly
• Neutral and earth bars included – suitable for distribution board integration
• Suitable for EV infrastructure, plant equipment and commercial three-phase systems

3 Phase Surge Protection for Distribution Boards

A dedicated 3 phase surge protection device enclosure helps protect commercial and industrial electrical systems against transient overvoltages caused by switching events or external surge activity.

The WMCUSP440C is commonly used alongside three-phase distribution boards, EV infrastructure, renewable systems and plant equipment where surge protection needs to be installed in a clean, accessible and pre-configured format.

Because the SPD, MCB and enclosure are supplied together, installers can reduce assembly time while maintaining a more organised surge protection arrangement.

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