By WCED

Surge Protection standalone modules

£18.50 - £95.00
£18.50
£18.50
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Supplied and supported by Eco Harmony — your trusted UK specialist for EV charging and electrical protection.

1-Year Warranty

Fast UK Shipping

Single & Three Phase

IP40 & IP65 Rated

Hugely Customisable

Standard Shipping 3-5 Buisness days£10
Express Shipping 1-2 Buisness days£20
SKU: WSPD240
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These standalone AC Type 2 surge protection modules can be added to any existing consumer unit, distribution board, or enclosure to provide surge protection for EV charger circuits and other sensitive electrical equipment. Available in 2-pole and 4-pole configurations, they mount on a standard 35 mm DIN rail and are designed for flexible use across a range of single-phase and three-phase installations.

Add surge protection to any existing board. Where a pre-fitted board is not required and you simply need to add a Type 2 SPD to an existing enclosure, these standalone modules are the most flexible and cost-effective solution.

What's included

  • Type 2 AC surge protection module — 2-pole or 4-pole (select variant)
  • DIN rail clip for 35 mm rail mounting
  • Suitable for single-phase (2-pole) and three-phase (4-pole) circuits

Technical specifications

Specification Detail
SPD type Type 2 AC
Configurations 2-pole (single-phase) and 4-pole (3-phase)
Mounting 35 mm DIN rail
Applications EV chargers, heat pumps, sensitive electrical equipment
Regulation compliance BS 7671:2018 Amendment 2

Frequently asked questions

Why does BS 7671 now require surge protection on EV charger installs?
BS 7671 Amendment 2 introduced a requirement for a risk assessment for surge protection on EV charger circuits. Modern EV chargers contain sensitive electronics that are vulnerable to transient overvoltages caused by lightning activity and grid switching events. For most UK installs, the risk assessment concludes that Type 2 surge protection is required.
What can a surge event do to an EV charger?
A transient overvoltage — a brief spike in voltage lasting microseconds — can damage or destroy the sensitive control electronics inside an EV charger. This can cause the charger to fail, require expensive repair, or need complete replacement. A Type 2 SPD diverts the surge energy safely to earth before it reaches the charger's internal circuitry.
Is a Type 1 or Type 2 SPD needed for EV chargers?
Type 2 SPDs are standard for EV charger installations. Type 1 SPDs are used at the service entrance where there is a risk of direct lightning strike to overhead conductors — typically only required where specified by the risk assessment. For the vast majority of UK EV installations, a Type 2 SPD is the correct and sufficient protection level.
Does this module include PEN fault detection or an RCBO?
No. This is a standalone surge protection module only. For a complete single-phase PME protection solution including PEN fault detection, RCBO, and surge protection in one unit, see our combined PEN fault + surge unit.
What is the difference between 2-pole and 4-pole SPD modules?
A 2-pole module is for single-phase circuits (line and neutral). A 4-pole module is for three-phase circuits (three lines and neutral). Using a 2-pole module on a 3-phase circuit would only protect one phase — always match the pole configuration to your supply.

Related products and resources

DC Surge Modules PEN Fault + Surge (All-in-One) Pre-Fitted RCBO + Surge Board Full Surge Range Product Finder
Type 2 AC SPD Standalone Module DIN Rail 2-Pole & 4-Pole Single & 3-Phase BS 7671 Compliant UK Stock
Surge Protection standalone modules
£18.50
£18.50

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