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Surge protector buying guide

Updated: October 2026

You have a twin socket behind the television and a basket of white bars that all say surge. This surge protector buying guide is the order of checks before you pay: a fused BS 1363 plug, a surge claim you can read, an indicator, and a 13 A load you can stay inside. The ten kept amazon.co.uk listings, priced from £8.25 to £29.95, sit on the [surge protector comparison](/hub/diy-supplies/surge-protector). Peter F. read those listings and the public UK sources on 15 October 2026. There was no laboratory test. A purchase through our amazon.co.uk links can earn a commission at no extra cost to you.

You have a twin socket behind the television and a basket of white bars that all say surge.

Our top picks

Belkin Belkin 4-gang 2 m surge lead

Best overall

Belkin Belkin 4-gang 2 m surge lead
8.8/10about £14.99
View offer
Masterplug Masterplug 4-gang 2 m surge lead

Rank 2

Masterplug Masterplug 4-gang 2 m surge lead
9.2/10about £8.70
View offer
Masterplug Masterplug 3-socket surge adaptor

Preis-Tipp

Masterplug Masterplug 3-socket surge adaptor
7.9/10about £8.25
View offer
On this page
  1. 1.A strip is not the SPD in the consumer unit
  2. 2.Plug, fuse, and shutters
  3. 3.Joules, clamping, and the indicator
  4. 4.One 13 A budget, then the extras
  5. 5.What to accept and what to reject

A strip is not the SPD in the consumer unit

A plug-in surge protector is a portable strip or adaptor on a BS 1363 socket. It claims to absorb some of a short voltage spike near the equipment. The IET’s consumer guidance puts a Type 1 device at the origin, a Type 2 device at the consumer unit, and a Type 3 device only as a supplement close to the load. Regulation 443.4.1, as the IET has explained it, is about that fixed protection, not one of these bars. Masterplug also says this class of lead is not a lightning arrester, so a storm is a reason to unplug. The first check on a listing is the plug.

Plug, fuse, and shutters

The plug should be BS 1363, with a BS 1362 fuse, and the portable sockets should be shuttered. BEAMA’s extension-lead checklist says the same. The Plugs and Sockets etc. (Safety) Regulations 1994 are the legal frame for those plug and fuse standards. Several Amazon attribute lines in this set say Type B or Type C while the title is a UK lead. Treat that clash as a data error until the photos show a square-pin plug. The HANYCONY four-gang is the awkward case: the plug attribute says Type B only, and the description does not state BS 1363. Belkin’s amperage line of 1,363 A is not a load.
Belkin Belkin 4-gang 2 m surge lead

Testsieger

Belkin Belkin 4-gang 2 m surge lead
8.8/10about £14.99
View offer

Joules, clamping, and the indicator

A joule figure is the energy the listing claims the strip can absorb. Printed figures in this set are 370 joules on the Masterplug SRG4210N at £8.70, 525 on the Belkin BSV400 at £14.99, 270 in the DEWENWILS description at £16.99, 1,800 on the HANYCONY eight-gang at £19.99, and 1,050 on the IECOPOWER at £23.99. Other listings claim surge protection and print no joules. Blank means not stated, not zero. If the indicator is out and the sockets still work, replace the lead. That sequence is on how to use a surge protector.

One 13 A budget, then the extras

Every lead here shares one 13 A plug. HANNELORE prints its own cap at 2,500 W, so you stop there on that strip. A kettle, a heater, or a microwave belongs in the wall. London Fire Brigade’s advice is not to share one extension between a kettle, a toaster, and a microwave, and the word surge does not change it. Socket count, USB, and cable length come after the load. The IECOPOWER listing claims USB-C at 20 W. The SE UKASE tower claims 2.4 A shared across three USB ports. Neither adds amps on the mains side. A switch is not surge protection. That distinction is surge protector vs extension lead.

What to accept and what to reject

Reject a listing whose photos do not show a UK plug, a listing you will overload, and a listing you are buying as a stand-in for the consumer unit. Accept a missing joule figure only when you have read the gap. The £8.25 Masterplug adaptor is the no-cable case, and reviewers say it blocks the neighbouring socket on a twin plate. Prefer a printed figure for a television or a PC: 370 joules at £8.70 if unswitched sockets are acceptable, 525 on the Belkin if the strip can sit loose, or 1,800 on the eight-gang if you can live with two bank switches. The tower prints Type 3 parameters and no joules.

Common questions

What should I check before I buy a surge protector in the UK?
Check the photos for a BS 1363 plug and a BS 1362 fuse, then shuttered sockets. Read whether joules are printed or blank, and whether there is an indicator. Add the load against one 13 A plug, with a kettle or heater in the wall. Cable length, USB, and switches come after those four.
Is a higher joule number a legal grade?
No statute or British Standard cited here sets a minimum joule number for a plug-in strip. A higher printed figure is a larger energy claim on that listing, not a pass mark. Masterplug’s own wording links more joules with a lower clamping voltage, so one number is incomplete. Treat 1,500 joules for a television as a publisher’s rule of thumb, not as UK law.
Does a plug-in strip replace the SPD in the consumer unit?
It does not. The IET describes a Type 3 strip as a supplement to a Type 2 device at the board, close to the equipment. Fitting that board device is a job for a qualified electrician. One of these amazon.co.uk listings does not make a house compliant, and skipping one does not by itself make a house illegal.
What if the listing says surge but prints no joules?
Record the surge claim as unstated. Five listings here do that: both Masterplug adaptors, the four-gang HANYCONY, the SE UKASE tower, and the HANNELORE metal strip. The tower does print Type 3 voltages, which is a different figure. You can still buy a blank listing for a low-value load if the plug and the 13 A limit are sound. For a television, prefer a page that prints the joules.
How much load can one 13 A lead carry?
One fused plug, shared by every socket on the bar. Stay near 3,000 W and under any lower number the maker prints. HANNELORE tells you not to exceed 2,500 W. Daisy-chaining a second lead does not create a second 13 A budget.

Related pages

Surge protector for a TV

Surge protector

Best surge protector UK for a TV, a PC, or a bench

How to use a surge protector safely on a UK socket

Surge protector vs extension lead: sockets or spikes

Sources

Public UK sources on surge protective devices, BS 1363 plugs, and extension leads. Listing prices and star counts are from the amazon.co.uk extracts kept for this comparison on 15 October 2026. Prices move.

  1. IET Wiring Matters, Surge Protective Devices, November 2023 (retrieved 15 October 2026)
  2. IET consumer guidance on SPDs (retrieved 15 October 2026)
  3. IET BS 7671 edition checker (retrieved 15 October 2026)
  4. Electrical Safety First, extension leads (retrieved 15 October 2026)
  5. Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 15 October 2026)
  6. BEAMA extension-lead checklist (retrieved 15 October 2026)
  7. Masterplug SRG4 sheet (retrieved 15 October 2026)
  8. Masterplug surge warranty (retrieved 15 October 2026)