Introducing the New F3 Series FuseBox Consumer Units

The latest FuseBox consumer units have arrived — and they’re smarter, sleeker, and more installer-friendly than ever. The new F3 series builds on the trusted reputation of FuseBox, combining innovative engineering with time-saving design improvements that electricians will appreciate on-site.

What’s New in the F3 Series?

The standout upgrade in the F3 series is the redesigned layout and enhanced usability. These boards aren’t just evolutions — they’re smarter from the inside out. Most notably, the upgraded SPD boards now feature a direct-to-busbar Type 2 Surge Protection Device, eliminating the need for an additional MCB to protect the SPD module. This design gives you one more usaeble outgoing way without needing to order a bigger board. The new SPD can be easily identified with its pink colour that the FuseBox brand has become synonymous for.

In practice, this simple change can make a big difference in tight installs, saving time on wiring and reducing clutter in the enclosure. For electricians dealing with limited space or large circuit counts, this is a very welcome move.

Browse our latest SPD boards: Surge Protection Consumer Units →

Faster Installs, Smarter Design

The F3 series consumer units also come with several layout and usability improvements:

• New neutral and earth terminal positioning for faster connections of cables
• Upgraded reinforced grommet strip included
• Redesigned internal chassis to improve working room
• Pre-installed T2 SPD kits with ready-to-connect fly leads
• Tail clamp (ACCF) fixed on the din rail (apart from F3014DT)

Each unit is clearly labelled and easy to configure. Whether you’re wiring an RCBO or MCB setup, the board layout encourages tidy installs and helps minimise testing time.

New Product Codes – The F3 Naming Structure

The F3 series can be easily identified by their updated product codes, all beginning with "F3", which are shown in the table below. These codes replace older versions and align with FuseBox’s new streamlined product strategy for 2025 and beyond.

Tip: When ordering, always double-check the product code to ensure you're getting the updated F3 model.

Why Electricians Prefer FuseBox

FuseBox consumer units have rapidly become the go-to choice for electricians across the UK thanks to their unbeatable combination of:

• High build quality at a competitive price
• Installer-friendly design that speeds up first and second fix
• Surge protected boards that don't cost the earth
• A wide range of options including main switch boards, dual RCD boards, and all-RCBO configurations
• Comprehensive technical support and well-labelled terminals

The new F3 range continues that legacy while introducing small but meaningful upgrades that electricians will notice immediately.

Do You Still Need a Surge Protection Consumer Unit?

Surge protection is now mandatory in most domestic installs unless a risk assessment deems it unnecessary — and let’s face it, for most homes with sensitive electronics, SPDs are worth it. The F3 SPD boards take the headache out of compliance, especially since the SPD kit is pre-fitted and no longer needs a separate protective MCB. To surge or not to surge? We've covered this topic in detail, explaining what it is and why its recommended.

Better still, you’re not sacrificing too many outgoing ways, just one — the SPD module is mounted directly to the busbar, freeing up a valuable circuit space.

Which FuseBox F3 Board Should You Choose?

If you're working on a new installation or consumer unit replacement, consider the following:

• F3 SPD Boards – For T2 compliant installs with built-in surge protection and full use of ways View SPD Boards →
• F3 Main Switch Boards – Ideal for RCBO configurations with future-ready layouts View Main Switch Boards →

Do the Original FuseBox MCBs, RCBOs and AFDDs Still Fit in the New F3 Boards?

Yes, they do. FuseBox try to keep things simple. All of their original devices are compatible with the new boards.

Ready to Upgrade?

Whether you’re doing a rewire, new build, or just need a reliable board that speeds up install time, the F3 series delivers. FuseBox continues to raise the bar for quality and functionality — and with smart upgrades like direct SPD integration and improved chassis layouts, they’re making the electrician’s job easier every day.

Explore the full range of FuseBox consumer units at Expert Electrical to find the right board for your next project.