Best Surge Protectors and Power Strips to Protect Your Tech
USB-equipped, high-joule strips that genuinely shield your kit when the storms roll in — ranked, tested and explained in plain English.
Every product below is now a surge-protected extension lead sold in the UK with a proper BS 1363 plug, and the figures come from manufacturer or retailer specifications. As always, check the listing shows a UK three-pin plug and a 13A fuse before you order.
A high-joule surge protector is the cheapest insurance policy your gear will ever have.
Here's an uncomfortable truth I've been banging on about for years: most people spend hundreds — sometimes thousands — of pounds on a telly, a gaming rig or a home-office setup, then plug the lot into a bargain-bin power strip that offers next to no protection. When a spike races down the mains during a summer thunderstorm, that flimsy strip does absolutely nothing, and suddenly you're shopping for a new PlayStation. A proper surge protector with a decent joule rating is the single most sensible bit of tech insurance you can buy, and the good news is that the best ones now bundle in USB-A and USB-C charging so they earn their place on your desk every single day, not just during a storm.
View APC PM5U-UK discontinued product status
In this guide I've pulled together the strips worth your money, ranked by how well they actually protect your gear, how many outlets and USB ports they offer, and how sensibly they're laid out for the chunky wall-wart adapters that clutter up real-world setups. I've leant hard into the brief that matters most: high joule ratings and useful USB charging. A strip that looks pretty but only shrugs off 600 joules is a very different beast to one rated for 4,320 joules with a substantial connected-equipment warranty behind it.
What "Joules" Actually Means (and Why You Should Care)
Before we get to the picks, let's demystify the one number that matters more than any other. A surge protector's joule rating tells you how much excess energy it can absorb before its protective components — usually metal oxide varistors, or MOVs — give up the ghost. Think of it as a fuel tank for absorbing spikes. A 4,000-joule strip can soak up far more abuse over its lifetime than a 600-joule one, and it'll keep protecting through many more small spikes before it's exhausted.
The clever part is that surges rarely arrive as one dramatic lightning bolt. Far more often they're a steady drip-feed of small spikes from your fridge compressor, air-con, or the neighbour's power tools kicking in. Every one of those nibbles away at the joule reserve. So a higher rating isn't just about surviving one biblical storm — it's about lasting years before the protection wears thin.
Higher joule ratings buy you both bigger surge headroom and a longer working life.
One thing worth knowing up front: a surge protector's MOVs wear out silently. That "Protected" indicator light isn't decoration — when it goes dark or changes colour, the strip has stopped protecting and is now just an expensive extension lead. Check it after every serious storm.
The Best Surge Protectors and Power Strips at a Glance
Below are my ranked picks. I've weighted the ranking towards genuine protection capability and USB usefulness, because those are the two things the brief cares about and, frankly, the two things most reviews gloss over. Each pick gets its own key specs and an honest pros-and-cons rundown before we get to the big comparison table.
APC Essential SurgeArrest PM5U-UK — Discontinued Reference, Not a Current Buy
View APC PM5U-UK discontinued product status
Schneider Electric discontinued this model on 11 February 2025, so its specifications are retained only as a reference; choose a current strip such as the Belkin BSV804af2M instead. APC quotes 918 joules — the highest rating of any mainstream UK lead I found — across five BS 1363A sockets, with two USB-A ports rated at 5V/2.4A for phones and earbuds.
The detail that matters more than the joule number is the fail-safe design. Once the protection circuit inside an APC SurgeArrest has been used up, the unit disconnects your equipment from the mains rather than quietly carrying on as an ordinary unprotected extension lead. That is the failure mode that catches people out with cheaper strips: they keep working, and you have no idea the protection went years ago.
APC also quotes an IEEE let-through rating of under 15%, and the unit filters EMI/RFI line noise. For a home office running a PC, a monitor and a NAS, this is the sensible default.
Pros
- Highest joule rating of the common UK leads at 918 J.
- Fail-safe mode cuts power once protection is exhausted — no silent failure.
- EMI/RFI filtering on top of surge protection.
- Block-spaced socket takes a chunky plug without blocking its neighbour.
Cons
- Only five sockets, so a big AV rack will want something wider.
- USB-A only — no USB-C Power Delivery for a laptop.
2. Belkin BSV804af2M — Best for a Full Workstation
Shop Belkin BSV804af2M on Amazon UK
Eight sockets, 900 joules and a 2-metre cable. If the APC's five sockets are one short of your setup, this is the straightforward answer — a desk with a PC, two monitors, a dock, a printer and a couple of chargers fits comfortably.
Two USB-A ports share 2.4A between them, so treat them as convenience charging for a phone and a set of earbuds rather than anything fast. The 900-joule rating sits just below the APC and comfortably above the budget leads.
Pros
- Eight sockets covers a full desk without daisy-chaining.
- 900 joules is genuinely good for a UK lead.
- Widely stocked, so easy to replace like-for-like.
Cons
- The 2.4A is shared across both USB ports, not per port.
- No USB-C.
3. APC Essential SurgeArrest PM5-UK — Best Pure Protection, No USB
Shop APC Essential SurgeArrest PM5-UK on Amazon UK
The same 918-joule protection and fail-safe design as the PM5U, minus the USB ports and with a 1.83-metre cord. If the lead is going behind a television or a hi-fi rack where nothing needs charging, there is no reason to pay for USB you will never plug into.
The block-spaced socket is the practical touch here: one position is spaced to take an oversized power brick without covering the socket next to it, which is exactly the problem that makes people reach for an adaptor and undo the protection.
Pros
- Same 918 J protection as the USB model, usually for less money.
- Block-spaced socket handles a bulky transformer plug.
- Fail-safe disconnect when the protection is spent.
Cons
- No USB at all — deliberate, but check that suits the spot.
- Five sockets.
4. Brennenstuhl Premium-Line 60,000A — Best if You Need USB-C
Shop Brennenstuhl Premium-Line 60,000A on Amazon UK
The only lead in this guide with a USB-C port as well as USB-A. Six sockets, a generous 3-metre H05VV-F cable and Brennenstuhl's Premium-Line surge protection.
That 3-metre cable is worth more than it sounds. Reaching a socket properly beats adding a second extension lead, and daisy-chaining leads is both a fire risk and a quiet way to defeat the surge protection you just paid for.
Pros
- USB-C on board — the only one here with it.
- 3m cable reaches the wall socket properly.
- Solid German build and a well-regarded range.
Cons
- Brennenstuhl does not publish a joule figure as prominently as APC or Belkin — check the listing for the exact model's rating.
- Usually pricier than the Belkin equivalents.
5. Belkin BSV603af2M — Best Compact Lead with USB
Shop Belkin BSV603af2M on Amazon UK
Six sockets, 650 joules, two shared-2.4A USB-A ports and a 2-metre cable. The smaller sibling of the BSV804, and the right size for a bedroom, a study corner or a media unit that does not need eight ways.
650 joules is a step down from the 900-plus leads, so I would put this behind a television and a console rather than an expensive PC — but it is still several times the protection of the cheapest strips.
Pros
- Sensible size for a desk or bedside without wasted sockets.
- 650 J is respectable in this price bracket.
- USB charging built in.
Cons
- Noticeably less headroom than the 900–918 J options.
- Shared USB current, USB-A only.
6. Masterplug SWSRG6210N — Best for Individual Switches
Shop Masterplug SWSRG6210N on Amazon UK
Six sockets, each with its own switch, plus separate power and surge LED indicators. Masterplug quotes 375 joules and a 13.5kA peak surge current, and the lead conforms to BS 1363/A and BS 5733/A.
The per-socket switches are the reason to pick this one. Being able to kill a single always-on device — a printer, a games console, a monitor that sips power overnight — without unplugging anything is genuinely useful, and the surge LED tells you whether the protection is still alive.
Pros
- Individual switches per socket.
- Separate power and surge status LEDs.
- Explicit BS 1363/A and BS 5733/A conformity.
- 13A rated with safety-shuttered sockets.
Cons
- 375 joules is the lowest protection tier here.
- No USB.
7. Masterplug SRG4210N — Best Budget Four-Way
See Masterplug SRG4210N on Amazon UK
£15.20 · 20% offprice at 23 Aug, may change
Four gangs, 2-metre cable, 375 joules. The honest budget option: enough protection for a router, a lamp and a laptop charger, at a price that makes it easy to fit one in every room rather than leaving kit plugged straight into the wall.
Do not put a home cinema or a gaming PC behind it. For the smaller jobs, it is vastly better than nothing and it carries the right UK approvals.
Pros
- Cheap enough to fit throughout the house.
- Proper BS 1363 fused plug and shuttered sockets.
- Compact four-way footprint.
Cons
- 375 joules — the entry tier of protection.
- No USB, no switches, no status LED on some variants.
Head-to-Head Comparison
Here's every pick side by side so you can weigh protection against outlets, USB and warranty at a glance. If you take one thing from this table, let it be the relationship between joule rating and what you're protecting — the two Belkins tower over everything else, whilst the Anker leads on modern USB-C charging.
| Model | Surge Rating | Sockets | USB | Cable | Notable |
|---|---|---|---|---|---|
| APC PM5U-UK | 918 J | 5 | 2× A (2.4A) | — | Fail-safe disconnect |
| APC PM5-UK | 918 J | 5 | None | 1.83 m | Block-spaced socket |
| Belkin BSV804af2M | 900 J | 8 | 2× A (2.4A shared) | 2 m | Most sockets here |
| Belkin BSV603af2M | 650 J | 6 | 2× A (2.4A shared) | 2 m | Compact |
| Brennenstuhl Premium-Line | Check listing | 6 | 1× A + 1× C | 3 m | Only USB-C option |
| Masterplug SWSRG6210N | 375 J | 6 | None | 2 m | Individual switches |
| Masterplug SRG4210N | 375 J | 4 | None | 2 m | Budget pick |
One thing worth saying plainly: UK surge-protected leads carry lower joule ratings than the American strips you will see quoted online, where 2,000–4,000 joules is common. That is a difference in market convention and mains voltage, not a sign that UK kit is inferior. Compare these against each other, and ignore a US strip's headline number — it is not a product you should be plugging into a 230V socket anyway.
Protection versus practicality — the whole line-up laid out side by side.
Surge Protection Ranked
Here is how the UK picks stack up purely on joule rating — the headline protection figure. Higher is not automatically "better for you"; it is about matching the rating to the value of what is plugged in. A 375-joule lead behind a lamp and a router is sensible. The same lead behind a £2,000 television is not.
The Brennenstuhl Premium-Line is left off this chart deliberately — Brennenstuhl does not publish a joule figure as prominently as APC, Belkin and Masterplug do, and we would rather leave a gap than invent a number to fill it. Check the rating on the exact model you are buying.
Pro Tip
Match the strip to the value of what it's protecting. Put your telly, games console, PC and NAS behind one of the 900–918 J leads — the APC PM5U-UK, PM5-UK or Belkin BSV804af2M. Lamps, fans and phone chargers are perfectly happy on a 375 J Masterplug. Buying one giant strip for everything usually means either overpaying for the cheap stuff or underprotecting the pricey stuff.
Features That Actually Matter When You're Choosing
Joules grab the headlines, but a few other features separate a strip you'll be glad you bought from one you'll quietly resent. Here's what I look at whenever I'm recommending one.
USB-C with real wattage
A USB-C port is only useful if it delivers proper power. Most UK surge leads still ship USB-A at a shared 2.4A, which is fine for a phone overnight and useless for a laptop. The Brennenstuhl Premium-Line is the one here with USB-C at all. Many strips include USB-C but throttle it to trickle speeds.
Multi-stage surge circuitry
Cheaper leads lean on a single MOV. What matters more on a UK lead is what happens when that MOV is spent: APC’s SurgeArrest range disconnects the load rather than carrying on unprotected, which is the more robust approach to catching different types of spike.
Honest status indicators
You want lights that tell the truth. Masterplug’s surge-protected leads carry separate power and surge LEDs, so a lit strip with a dark surge light tells you the protection has gone even though the sockets still work. That distinction is the whole point of the indicator.
Outlet spacing
Sockets spaced to take a bulky power brick without covering the one next to it. APC calls its version a block-spaced outlet; it is the difference between using all five sockets and losing two to a single fat transformer plug — which is what pushes people into stacking adaptors and undoing the protection they just bought.
Fire and thermal safety
Look for conformity to BS 1363/A and BS 5733/A, shuttered sockets and a correctly rated 13A fuse — Masterplug states these explicitly — plus APC’s fail-safe disconnect. Those are the reassurances you want on something running unattended 24/7.
Connected-equipment warranty
Belkin's connected-equipment cover and Anker's connected-equipment cover connected-equipment warranties are a manufacturer effectively backing their protection with cash if a surge slips through. It's a genuine signal of confidence.
Outlet spacing and honest indicator lights matter more day to day than a headline joule number.
Do Surge Protectors Really Stop Storm Damage?
Let's be straight about what these devices can and can't do. A quality surge protector is superb at handling the everyday spikes and moderate surges that make up the vast majority of mains disturbances — the compressor kicks, the grid switching events, the neighbourhood surges. For those, a 900J or 918J lead is genuinely protective and will save your kit time and again.
A direct lightning strike to your property is a different order of magnitude, and no plug-in strip is designed to fully absorb that. What the better leads do give you is layered defence — multi-stage protection built to catch surges arriving through different paths, and a fail-safe cut-off when the protection is exhausted — plus, in Belkin's case, protection on your phone and coax lines, which are sneaky routes for surges to reach your gear.
The single best storm-safety habit costs nothing: if a severe electrical storm is directly overhead, unplug your most valuable irreplaceable kit at the wall. A surge protector is your everyday guardian; physical disconnection is your worst-case insurance.
Frequently Asked Questions
Who Should Buy What
The all-rounder
Do not buy the APC PM5U-UK as a current recommendation; it is discontinued. Choose a current, correctly specified alternative such as the Belkin BSV804af2M.
The home-cinema owner
Buy the APC PM5-UK. Same 918-joule protection without USB you will not use behind a TV, and a block-spaced socket for a fat power brick.
The big-setup power user
Buy the Belkin BSV804af2M. Eight sockets and 900 joules covers a full desk without daisy-chaining a second lead.
The USB-C household
Buy the Brennenstuhl Premium-Line. The only lead here with USB-C as well as USB-A, on a 3-metre cable that actually reaches the wall.
The sensible home office
Buy the Belkin BSV603af2M. Six sockets, 650 joules and USB charging in a footprint that suits a desk rather than a rack.
The energy-conscious
Buy the Masterplug SWSRG6210N. Individual switches let you kill one always-on device without unplugging anything, and the surge LED tells you the protection still works.
The budget shopper
Buy the Masterplug SRG4210N. 375 joules and four gangs, cheap enough to fit one in every room instead of plugging kit straight into the wall.
The Verdict
If you want one current recommendation to end the deliberation, choose the Belkin BSV804af2M: eight sockets, a 900-joule published rating and a 2-metre cable. The APC PM5U-UK is now a discontinued reference rather than a current best buy.
The right answer still depends on what you are protecting. For a bigger desk, the Belkin BSV804af2M gives you eight sockets at 900 joules. If you need USB-C, the Brennenstuhl Premium-Line is the only lead here that has it. And if the job is a router in the corner rather than a home cinema, the Masterplug SRG4210N is honest, cheap protection that beats plugging straight into the wall.
Whichever you choose, check two things on the listing before you order: a UK three-pin BS 1363 plug, and a 13A fuse. Anything quoting a 15A or 1875W ceiling is built for 120V American mains and does not belong on a UK socket.