Best Whole House Surge Protector

People nowadays are using more electrical and/or electronic products in their homes than they did even two decades back. Take a cursory glance inside a modern-day apartment or tenement and you’ll come across a TV, refrigerator, DVD player, washing machine, computer equipment, home theater system and so on. If you delve deeper, you’ll come across a vacuum cleaner, garage door opener, and indoor security camera.

The sheer variety of electrical gadgets that a typical present-day household uses consumes a large amount of electricity every day. Just imagine a scenario where all gadgets or devices that are electrically-powered go kaput because of overvoltage from the utility company or the surges from the backup generator at home or office. Contrary to what most people believe, more damage happens from transient surges that originate inside the home than from lightning surges.

Best Whole House Surge Protectors – Top Rated Products


Capacity & Modes


Check Price

Eaton 109420 Ultra Surge Protection 3rd Edition

120/240V, 4 Modes

2.4 x 5.2 x 7.5 inches


Square D by Schneider Electric HOM2175SB Homeline SurgeBreaker SPD

120/240V, 4 Modes

2.6 x 2 x 3.1 inches


Square D HEPD80 Home Electronics Protective Device by Schneider Electric

120/240V, 6 Modes

2.7 x 3.8 x 3.6 inches


Intermatic IG2240-IMS Whole Home Surge Protection Device with Consumable Modules

120/240V, 6 Modes

10.8 x 3.8 x 10 inches


Whole House Lightning Power Panel Surge Protector + Spike Ender Brand Coaxial Cable Suppressor by Sycom and Spike Ender

120/240V, NA

8 X 4 X 2 inches


Leviton 51120-1 Panel Protector, 120/240 Volt

120/240V, 4 Modes

8.2 x 8.1 x 4.7 inches


Intermatic IG1240RC3 Whole Home Type 2 Surge Protection Device

120/240V,  NA

6.5 x 8.3 x 8 inches


89114 Lightning Arrestor/Surge Suppressor from Morris Products

120/240 V,  4 Modes

2.2 x 3 x 0.8 inches


Siemens QSA2020SPDWhole House Surge Protection with Two 20-amp Circuit Breakers for use only on Siemens Panels

120/240V,  NA

3 x 2 x 3 inches


Square D SDSA1175 Panel Mounted Single Phase Type 1 Surge Protective Device from Schneider Electric

120/240 V, 6 Modes

2.7 x 2.2 x 2.2 inches



Eaton 109420 Ultra Surge Protection 3rd Edition

The Eaton 109420 Ultra Surge Protector 3rd edition is an extremely efficient type-2 SPD that is compatible for safeguarding indoor as well as outdoor electrical equipment. Setting up this SPD from Eaton is amazingly easy as it comes with rounded flanges having eyehole for installing on panels of circuit breakers or load center boxes. There are two LED ‘status indicators’ that stay lit simultaneously signaling to you that the unit is functioning smoothly.

The Eaton Ultra Surge Unit is quite lightweight weighing just a pound so installing it should be convenient. This surge protection unit is compatible with the surge protection and performance standards outlined in the 1499 3rd edition of UL making it an effective TVSS (transient voltage surge suppressor).

  • UL certified 1499 3rd edition SPD guarantees comprehensive protection from spikes or surges
  • Easy installation on any brand of circuit breaker or load-center
  • Being lightweight facilitates easy installation
  • Ideal for installing in homes & indoor commercial spaces located in areas where surges happen frequently
  • Protects electronic gadgets as well as telephone lines and power cables
  • Breakers not provided with the SPD
  • Customer service and support almost non-existent
  • Wouldn’t be safe for DIY (better to hire an experienced electrician for installation

Square D by Schneider Electric HOM2175SB Homeline SurgeBreaker SPD

The Square D HOM2175SB Homeline SurgeBreaker is a hardwearing surge protective device that’ll provide a safety shield to all your home gadgets and electrical fittings. Offering protection from unexpected and rapid bursts of surges or spikes, the HOM2175SB is ideal for setting up with Square D Homeline circuit-breakers and load-centers. The SPD is rated as an NEMA-4 enclosure type which means it’s compatible with using either indoors or outdoors. This unit also suppresses surges and clamps overvoltage spikes when coordinated with Spike Ender coaxial cable suppressor thereby protecting HDMI receivers, cable modems, and an entire range of digital devices. Setting up the unit is a breeze as it comes with two MOVs (metal-oxide varistor).

  • Total protection to all power receptacles, outlets, and circuits throughout the house (inside or outside
  • Convenient installation-MOVs easily fitted on pole receptacles
  • Operational status indicated by LED
  • Compliant with UL’s 1449 3rd edition and classified as Type 2SPD
  • Maximum surge protection capacity of 22,500 amps
  • Three-year warranty
  • Cannot be installed on all brands of circuit-breakers or load-centers.
  • A second layer or line of transient suppressors may be needed for whole house protection
  • It won’t be easy to install if an individual doesn’t have a fair idea of electrical panels
  • Once installed, the LED indicator can be difficult to spot

Square D HEPD80 Home Electronics Protective Device by Schneider Electric

The Square D Home Electronics Protective Device by Schneider Electric has been meticulously designed to work in tandem with load-centers as well as with surge strips thus ensuring security from transient voltage surges or nanosecond spikes. The HEPD80 unit clamps down and shunts bursts of overvoltage occurring in the electrical circuits to the ground something which can’t be achieved by surge strips connected with the TV or air-conditioner. This unit has a surge rating of 80 kA that renders its circuitry to safeguard your electric oven, dishwasher, refrigerator, garage door opener, and other gadgets with sensitive circuits. The SPD is NEMA 4X rated rendering it ideal for installing throughout the house.

  • High-powered suppression circuitry for protection from high and low overvoltage
  • MOVs merged individually with over-current and thermal fusing
  • LED ‘operation status indicator’ visible directly, no need to open circuit-breaker panel
  • NEMA 4X rated, can be set up both inside and outside of home
  • Type 1 SPD and UL 1449 3rd edition
  • Need to fulfill numerous conditions in order to file & win a claim
  • Exact length or rather the shortness of leads not mentioned

Intermatic IG2240-IMS Whole Home Surge Protection Device with Consumable Modules

Safeguard all your home or office appliances including but not limited to TV, computer, fax machine, printer, and dishwasher from breakdown due to transient and short-term surges. This SPD from Intermatic comes with six consumable modules enabling you to replace the dysfunctional one when it dies from an overvoltage. LED lights have been built into the Intermatic IG2240-IMS surge protector that lets you know when to replace a module.  So, you’re spared from the hassle of detaching the entire unit and buying a new one all over again. The IG2240 series is compatible with a range of type 1 and type 2 applications making them perfect for both indoor and outdoor installations.

  • Safeguards any device drawing power from electric meter or panel
  • Meets UL 1449 3rd edition or ANSI specification for surge suppression and performance standards
  • No need to remove entire unit if a module becomes dysfunctional 
  • 6 consumable modules exploiting TPMOV technology that can be replaced safely & conveniently 
  • status indicator LEDs may not be visible from a distance 
  • Can’t be installed upside down
  • May not safeguard against lightning strikes

Whole House Lightning Power Panel Surge Protector + Spike Ender Brand Coaxial Cable Suppressor by Sycom and Spike Ender

The Whole House Lightning Power Panel Surge Protector from Sycom and Spike Ender is reinforced with a range of versatile features enabling you to shield electrical and electronic gadgets in or outside the home from lightning strikes as well as surges. For instance, the LED indicator signifies whether the unit has been properly installed; earthing is present, and that the SPD is functioning. The surge protector shunts 100,000 amps of current to the ground thus shielding all your expensive electrical gadgets. Response time is real fast as the unit begins clamping within 5 nanoseconds and can be automatically reset after every surge.

  • High-energy absorbing circuitry for suppressing & clamping 100 kA of current
  • Very fast response time-clamps overvoltage within 5 nanoseconds
  • Easy installation-Only required to connect three wiresIs compatible with almost all 2- pole load-centers
  • Can be set up outside or within the power panel
  • Fully weatherproof
  • LED indicator light indicates appropriate installation, functioning, & presence of grounding
  • Installation is not as easy as claimed by the manufacturer
  • LED status indicator may not be visible from a distance

Leviton 51120-1 Panel Protector, 120/240 Volt

The 51120-1 Panel Protector from Leviton is a performance-oriented SPD that guarantees all electrical components are safe against voltage spikes and surges. The unit has been designed and fabricated using state-of-the-art electrical safety technology and a superior grade of ingredients which guarantees that you can bank on it. There are LED indicators that let you make out whether the unit is functioning or net. Encased with J-metal, the Leviton 51120-1 Panel Protector is fully protected from the elements and hence can be installed wherever you want it to. It offers 4 modules of protection and functions where the voltage supply specifications are 120/240V.

  • Surge protector device fabricated out of solid J-metal
  • Complete safeguard from overvoltage & sudden voltage spikes
  • Green LED lights indicate whether unit is functioning or not
  • Suitable not only for domestic but also for commercial use
  • Installing the SPD is a breeze
  • Doesn’t come with the wires needed for connection to the main panel
  • Claims settlement process might be an arduous oneInsurance warranty doesn’t include outdoor equipment
  • May need to use individual surge protection strips for gadgets apart from this Leviton SPD

Intermatic IG1240RC3 Whole Home Type 2 Surge Protection Device

The IG1240RC3 Whole Home Type 2 SPD has been designed painstakingly to accord total safeguard from voltaic surges occurring on line-to-line, line-to-neutral, line-to-earth, and neutral-to-earth circuits. This surge protective device from Intermatic shields all gadgets and appliances powered by electricity from overvoltage as it has a whopping surge safeguarding capability of 60,000amps.

The Intermatic IG 1240RC3 SPD complies with UL 1449 specifications and has an NEMA 3R rating rendering it suitable for installing on service entrance, sub-panel or main panel inside or outside the home. The surge protector comes with a 4-wire connect which makes setting it up convenient and also offers 4-way voltage clamping.

  • Designed for installing across domestic and commercial establishments
  • 4-wire hookup provides 4-way surge suppression
  • Can be installed on a 120/240V Ac power supply system (single phase)
  • NEMA 3R hardy polycarbonate casing
  • Tinned copper lead wires prevents them from becoming oxidized & unduly heated up
  • Green LED status indicator light
  • Compliant with UL 1449/ANSI requirements
  • The Intermatic IG 1240RC3 is a relatively large SPD that may not fit on some breaker panels
  • Instructions for installation not presented in an orderly manner

89114 Lightning Arrestor/Surge Suppressor from Morris Products

The 89114 Lightning Arrestor/Surge Suppressor from Morris Products is a Type 2 SPD that’s designed and hardwired to furnish thorough protection from overvoltage in the utility’s power lines as well as surges originating inside the homes. Once properly installed on the main breaker panel or sub-panel, the SPD resets automatically after an overvoltage event thereby guaranteeing protection against a series of such surge occasions. It offers 900V line-line and 500V line-to-ground protection and is suitable for operating on a 120/240V single-phase power supply line. It has an incredibly fast clampdown response time equivalent to less than 1 nanosecond. It has a 72,000amps surge protection capacity rating and meets all requirements of UL 1449 3rd edition.

  • Designed to provide complete protection from surges and overvoltage
  • Meets all surge protection requirements prescribed under UL 1449 3rd edition
  • Very fast clamp down response time: less than 1 nanosecond
  • Surge protection capacity of 72,000amps
  • Designed to operate on 120/240V AC single-phase circuits
  • LED status light indicator
  • Might not protect from brownouts
  • Status light indicator may not be distinctly visible

Siemens QSA2020SPD Whole House Surge Protection with Two 20-amp Circuit Breakers for use only on Siemens Panels

The Siemens QSA2020SPD furnishes total safety to all your gadgets and devices connected to electrical circuits from unintentional surges, spikes, and overvoltage. This SPD after it has been mounted on the single pole breaker panel is left with two spare pole breakers. This feature implies that the entire space in the load center of your home is optimally utilized thereby according to complete safeguard from overvoltage to the whole panel. The device is designed to work in a 120/240V AC rated supply line. There are two LEDs that light up to indicate that the unit is functioning properly. The Siemens QSA2020SPD has a maximum surge protection capacity rating of 40,000amps.

  • Works as a standalone whole house surge protector
  • Has a maximum surge suppression capacity of 40,000amps
  • Two green LEDs indicates whether unit is in operation
  • Compliant with UL1449 3rd edition
  • Also, functions as a circuit breaker
  • Entire breaker panel or load-center is used up thereby ensuring full-scale protection
  • LED lights are not always readily visible
  • Warranty is not as comprehensive as those offered by other SPD brands
  • Cannot be fitted on an ITE panel

Square D SDSA1175 Panel Mounted Single Phase Type 1 Surge Protective Device from Schneider Electric

If you’re looking for a single, standalone device to safeguard home appliances and gadgets powered by electricity from transient voltage spikes and surges, then you can rely on Square D SDSA1175 SPD from Schneider Electric. Its compact form factor enables the same to be set up beside power panels or within load-centers. As it comes with an NEMA 4X grading, it is appropriate for installing anywhere inside or out of the home. Being a Type 1 category device, it can be used alongside surge suppression strips as well as without these. SDSA1175 comes with a 3-wire hookup which implies it provides 3-way surge protection.

  • Compact built enables easy installation on control cabinets, meter sockets, and power panels
  • Hardwearing casing makes it supremely durable for across the board applications
  • Two SDSA1175 can be installed side by side for suppressing surges in a 3-phase supply
  • Status light indicator shows whether unit is operating or not
  • Can be used along with surge protection strips
  • The indicator light is not as bright as it should be and is visible when viewed from one specific direction
  • Installation instructions are not clear and organized
  • Indicator lights up even during single-phasing

Best Whole House Surge Protector - Buyer's Guide

The electrical and electronic devices in your home are more vulnerable to becoming defunct from overvoltage from utility power lines, surges or spikes from generators, air conditioners, and electric motors than from lightning strikes. Smart homes that have advanced security devices like a thermostat or smart lock apart from the ordinary home appliances are at greater risk of suffering, even more, damage from sudden surges or spikes. A best whole house surge protector or surge protection devices (SPDs) would accord manifold layers of safety to your home appliances.   

Factors To Keep In Mind While Choosing The Best Whole House Surge Protector

While searching for a quality surge protector, what you need to keep in mind is that not all surge protectors are the same. Bear in mind that a high-end or expensive surge protective device may not qualify to be the ‘best’ when it comes to shielding home gadgets from overvoltage or nanosecond spikes. In fact, some products might even make the household devices more susceptible to surges instead of safeguarding them.

If you wish to impart a foolproof security to electrical/electronic gadgets at home, always go for a house surge protector and never a surge strip. A surge strip is simply an extension of a walled electrical outlet (which powers up only one gadget) that has several ports letting you connect multiple appliances from it. The strip just functions as a circuit breaker or a fuse protecting your gadgets from circuit overload and not from voltage spikes or surges.

Firstly ensure that the product label is printed with the words ‘surge protector’- it is as simple as that. Thereafter check out the following aspects:

  • The protector should have the required number of ports that’d be appropriate for your home
  • Spare a thought to the gear or equipment that you’ll be plugging in
  • Look for the UL (Underwriter’s Laboratories) stamp containing the words ‘transient voltage surge inhibitor’
  • The overvoltage threshold or clamping voltage rating should be 400 volts or lesser


All the 10 surge protective devices reviewed above can qualify to be the best whole house surge protector on account of their being equipped with resourceful features that come in handy for protection against surges. However, if you’re looking for an affordable SPD that does the basic job of the surge and short, transient spike protection efficiently, then you can opt for the Square D HOM2175SB Homeline SurgeBreaker SPD or the 89114 Lightning Arrestor/Surge Suppressor from Morris Products. And if you’re willing to opt for a high-end product, the Intermatic IG2240-IMS Protection Consumable Modules or the Leviton 51120-1 Panel Protector fits the bill perfectly.