FuseBox has once again raised the bar in domestic and commercial circuit protection with the launch of its F3 Series consumer units, now equipped with an innovative single-module Type 2 SPD. The new SPD device, model number SP1MT2, connects directly to the busbar, eliminating the need for a separate MCB and freeing up an extra usable way in every board that includes it.

This streamlined design offers tangible benefits to installers, simplifying installation, saving space, and reducing cost, all without compromising safety or functionality. With the SP1MT2 module, FuseBox reaffirms its commitment to practicality and forward-thinking engineering.

Space-Saving Surge Protection
Traditionally, incorporating a Surge Protection Device into a consumer unit requires sacrificing at least one usable way and a dedicated 32A MCB. This not only limits the number of outgoing circuits but also adds complexity to the board’s wiring and layout.

FuseBox has solved this problem neatly. The SP1MT2 SPD module occupies just a single DIN slot and plugs directly into the main busbar, removing the need for a separate overcurrent protective device. This clever integration provides full SPD functionality while leaving one more usable way available for outgoing circuits, especially valuable in smaller boards or installations where space is at a premium.

A Full Range of Options
The F3 Series spans from compact 7-way models to large-scale triple-bank boards, all benefitting from the same core innovation. The following models will be available with the integrated SPD:

F3007MZ – 7 Way with 100A Main Switch + SPD

F3011MZ – 11 Way with 100A Main Switch + SPD

F3015MZ – 15 Way with 100A Main Switch + SPD

F3021MZ – 21 Way with 100A Main Switch + SPD

F3023MZ – 23 Way Double Bank + SPD

F3031MZ – 31 Way Double Bank + SPD

F3047MZ – 47 Way Triple Bank + SPD

Whether it’s a domestic dwelling or a more complex multi-zone installation, there’s an F3 unit to meet the need, with the added benefit of not sacrificing space for surge protection.

Built for the Installer
Alongside the integration of the SP1MT2 module, the FuseBox F3 Series retains all the build-quality hallmarks the brand is known for. Each unit features:

• Reinforced grommet strip entries to protect cables and maintain enclosure integrity
• Generous wiring space and smart internal layout for easy, tidy installations
• Solid metal construction that meets the latest amendment requirements of the BS 7671 wiring regulations
• Clear labelling and a well-organised design to aid with ongoing maintenance

These boards are made with the installer in mind, reducing installation time, improving aesthetics, and helping ensure compliance with modern electrical safety standards.

Trusted Performance, Ready for the Future
FuseBox has earned a reputation for designing boards that offer performance, reliability, and exceptional value. With the F3 Series, they’ve taken that reputation a step further, incorporating a next-generation SPD system that answers one of the most persistent space-efficiency challenges in consumer unit design.

The SP1MT2 module not only improves board layout but also reduces component count, simplifies specification, and futureproofs installations with high-quality surge protection already built in. It’s a smarter solution for modern electrical needs.

Available from June 2025
The full range of F3 Series consumer units with integrated SP1MT2 SPD are already live on the site and available for pre-order, and are expected to ship from June 2025. Whether you’re upgrading a domestic board or planning a multi-way configuration for a larger project, these boards offer the latest in safety, convenience, and innovation.

For electricians looking to deliver better layouts and make full use of every available circuit way, without compromising on protection, the FuseBox F3 Series sets a new standard.