Best surge protectors

How to choose

Think in two layers

NIST doesn't treat a panel device and plug-in units as either-or. A service panel device diverts large surges on the power line before they enter the house, but it isn't enough alone for gear with a cable or phone line. Plug-in units cover what it can't.⁵ A plug-in unit won't stop a direct strike, as Belkin's own guide says.¹⁶

Panel devices come as Type 1 or Type 2, which differ by where they connect. The 2020 National Electrical Code requires one on services supplying dwelling units, including when service equipment is replaced, so a home with a recent panel may already have one. Your state's adopted code edition decides whether that applies.²⁷

In storm-prone states, ask an electrician about a panel device before you buy more strips. Triple-I counted 61,986 lightning-related homeowners claims in 2025, up 11.6 percent, and the average claim rose 42.8 percent, partly because of high-value electronics and smart-home gear.²⁸

For plug-in units, a sensible plan is one at each cluster of sensitive electronics: the TV, the desk and the network gear.

Protect the second wire

Surges don't arrive only on the power cord. A TV on cable or a computer with a modem can be damaged by the voltage difference between two systems, even when each has its own protector. NIST's fix is one box that carries both the power and the other line, and it notes that insurers see video equipment among the most frequent damage claims.¹ If your gear has a coax or wired phone line, run it through the strip. A strip without those connections protects only half the path. For gear on power alone, a simple plug-in unit is enough.¹

Prefer a strip that cuts power when it fails

Some protectors cut output power when the protective part fails. Others keep supplying power with no protection left, and NIST asks how often you'll really check a light behind a desk.² A strip that goes dead tells you to replace it. If you buy one that may keep running, mount it where you can see the light.

Check for a real safety listing

Look on the unit or box for a mark from UL, ETL or CSA, as NIST advises.⁴ A spec sheet that names UL 1449 and prints a let-through figure tells you more than a phrase such as "UL safety standards." A plain power strip only adds outlets, and some popular ones have no surge rating at all.¹¹

This matters because surge protectors do start fires. NFPA estimated that they were involved in about 590 US home fires a year from 2010 to 2014, with about 10 deaths and 40 injuries a year.²⁹ Stop using any strip that is hot, scorched or melted, and throw it out.

Be wary of unknown brands on marketplace sites, especially metal strips with no breaker. Stop using these recalled products immediately. ANNQUAN and CCCEI metal strips have no overcurrent protection, which creates a fire risk if they're overloaded, and CCCEI drew reports of sparking and melting. HEZI strips have an ungrounded metal case that poses an electrocution hazard. Aduro surge protectors have incorrect polarization and poor solder joints, which are shock and fire hazards. Contact the seller named in each CPSC notice. CPSC lists a refund for all four.^{22 30 31 32}

CPSC also recalled about 15 million older APC units in 2013 after 700 reports of overheating and melting. It says to throw out the recalled APC 7 and 8 series SurgeArrest units, made before 2003.³³ CPSC's records showed no recall of any pick in this guide in November 2026. Belkin's 2009 recall covered older SurgeMaster units, models F9G930, not the strip here.³⁴

Don't shop on joules or the lowest voltage

A joule is a unit of energy, and the joule rating is meant to show how much a protector can absorb. NIST calls it a simplified measure, says typical values run from about 100 to 1,000 joules or more, and notes that makers often print a total across three wiring paths. It says maximum surge current may tell you more, and that even the lower current ratings on offer are enough for most surges.³⁵ So don't pay extra for 4,320 joules over 2,880. Use the number only to rule out very low ratings.

Clamping voltage is the level at which a protector starts to divert a surge, and lower isn't automatically better. NIST engineers wrote in 1989 that a lower figure makes the varistor act more often and ages it faster. In their worked example, on a 220 to 240 volt circuit, a 250 volt part reached its pulse limit six times sooner than a 320 volt part.^{36 37} NIST's booklet says 400 volts or more may be enough for electronics.⁹ Any listed unit from 330 to 500 volts is a fair choice.

Use it the way it was listed

Plug it straight into a grounded wall outlet. OSHA cites UL's instructions that these strips must not be plugged into each other or into extension cords, and says they aren't built for space heaters, refrigerators or microwaves.³⁸ If you have old two-prong outlets, fix the outlet first, because a protector has less to work with without a working ground.¹⁶

A surge strip does nothing for sags or outages. NIST points to a small UPS, a battery backup, for those.⁵ Follow the UPS maker's rules, because Belkin warns against plugging a surge strip into one.¹⁶

Replace it after an event, not by the calendar

Replace any strip after a nearby lightning strike or a utility line fault, or when the protection light goes out or the case is damaged. NIST's booklet reports the view among surge specialists that most rare catastrophic failures come from excessively high line voltage during a power system fault, not from huge surges.³⁹

The common advice to replace a strip every 3 to 5 years is a rule of thumb with no study behind it.⁴⁰ Normal line noise does wear varistors, according to Belkin, but NIST's engineers cite work showing that many low-energy surges use little of a varistor's rating, while lightning-level surges use far more.^{41 42} One Hacker News commenter adds that you can't check a varistor's condition without testing that may destroy it.⁴³ On a strip with no shutoff, a fixed replacement date is a cautious habit for costly gear, not a proven limit.