Surge Protection Devices (SPD) – Domestic & Commercial
Surge Protection Devices (SPDs) protect electrical installations from transient overvoltage caused by switching events and lightning-related surges. Under the 18th Edition of BS 7671, surge protection must now be considered on all new consumer unit installs and upgrades.
Our range includes Type 2 SPDs, retrofit surge modules, and pre-wired metal enclosure kits – suitable for domestic properties, EV charger installs, heat pumps, solar inverters and three-phase systems.
Quick answer: Most UK homes and small commercial sites require a Type 2 SPD installed at the consumer unit to comply with modern wiring regulations and protect appliances from voltage spikes.
Read more about surge protection
We stock:
- Type 2 SPDs – the standard choice for domestic and light commercial installs
- Single and three-phase options – including 4-pole units
- Standalone SPD modules – compact retrofit solutions
- Pre-wired SPD enclosure kits – quick-fit protection alongside consumer units
All units are tested to BS EN 61643, UK stocked and backed by manufacturer warranties.
A-Type RCBO EV Kit – 2 Way 40 A C Curve (WMEV240C)
£28.34
The WMEV240C is a 2-way A-Type RCBO EV Kit fitted with a 40 A C-curve high-immunity Type A RCBO. It provides combined overload, short-circuit and earth-leakage protection (30 mA AC + 6 mA DC) and meets the latest 18th Edition Amendment 2 requirements for EV...
3 Pole Surge Protection Device WSPD340
£21.35
The WSPD340 is a 3-pole Type 2 Surge Protection Device designed for three-phase boards. Rated at 20kA nominal discharge and 40kA max discharge, it provides reliable protection against transient overvoltages caused by indirect lightning strikes and switching surges. Built to comply with BS 7671 and...
WSPDTE-2 Surge Protection Device (1P+N, Type 1+2)
£64.40
The WSPDTE-2 is a 1P+N Type 1+2 AC surge protection device designed for single-phase incoming supplies where both lightning current discharge and transient overvoltage protection are required. It is typically specified on installations with external lightning risk, overhead supplies, or exposed locations. By combining Type...
WSPDTE-4 Surge Protection Device (3P+N, Type 1+2)
£95.05
The WSPDTE-4 is a 3P+N Type 1+2 AC surge protection device designed for three-phase incoming supplies where protection against both lightning currents and transient overvoltages is required. Commonly specified on commercial and industrial installations, it provides a single-device solution for primary and secondary surge protection...
Heat Pump Consumer Unit 10 Way (WME10/HP40R16)
£224.90
Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping. The WME10/HP40R16 Heat Pump Consumer Unit is a dedicated protection board for inverter-driven heat pump systems. It comes pre-fitted with a 40A Type B RCD, a 16A MCB,...
Why Surge Protection Is Now Standard
Modern properties contain sensitive electronics – boilers, smart controls, EV chargers, heat pumps and consumer electronics. A single voltage spike can cause irreversible damage. Installing an SPD at the distribution board protects the entire installation and reduces the risk of costly equipment failure.
Domestic & Whole House Surge Protection
A whole house surge protector is typically a Type 2 SPD fitted within the consumer unit. It protects all final circuits from transient overvoltage events.
Popular choice: Single Module Surge Protection Device for straightforward retrofits.
EV Chargers, Heat Pumps & Renewables
Surge protection is especially important on inverter-driven systems. For compliant EV installs, many electricians choose integrated protection such as the 4-Way EV Protection Unit with SPD.
For higher-load or renewable systems, explore our three-phase protection options.
Choosing the Right SPD Type
- Type 1 SPD – typically required where lightning protection systems are installed.
- Type 2 SPD – standard for most UK domestic and commercial consumer units.
- Single-phase vs three-phase – match pole configuration to supply type.
- Integrated kits vs modules – choose based on board space and retrofit requirements.
18th Edition Compliance
BS 7671 requires surge protection to be assessed on every installation. In most residential and light commercial environments, a Type 2 SPD is required unless a formal risk assessment determines otherwise.
Why Buy From Power & Data UK?
All surge protection devices are BS EN 61643 certified, UK stocked and available with next-day delivery on qualifying orders. We provide clear technical specs and straightforward returns support for trade buyers.
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FAQs on Surge Protection
Is surge protection mandatory in the UK?
Surge protection must be considered under BS 7671. In most modern domestic installs, fitting a Type 2 SPD is standard practice.
Can I retrofit an SPD to an existing consumer unit?
Yes. Standalone modules and external enclosure kits allow surge protection to be added without replacing the full board.
Do EV chargers require surge protection?
Yes – most EV charger manufacturers and current wiring regulations require surge protection to be included as part of a compliant installation.