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Protect All of Your Home Electronics with a Single Device
Leviton 51120-1 Panel Mount Whole Home Surge Protector and Supressor
Leviton 51120-1 Panel Mount Whole Home Surge Protector and Supressor
Leviton 51120-1 Panel Mount Whole Home Surge Protector and Supressor
Item# 4860
Price: Normally $199.95 
Hot Deal $189.97
Open Box (Qty:1) $157.70 ea - Add to cart
Free shipping on orders over $175 - See Details


  • For use at the service entrance, utility meter, or other branch panel locations
  • Unlimited main breaker panel current
  • Transient surge capacity - 950 joules, Maximum surge current - 50,000A
  • Response time - Instantaneous
  • Can be surfaced-mounted or flush-mounted in-wall in a 6"x 6"x 4" cutout

Essential Info

Provide your home with protection from high-energy transient voltage surges that can damage sensitive electronics such as computers, audio and video gear and other electronic appliances. The Leviton 51120-1 Whole Home Surge Protector and Suppressor can be used individually or as part of a coordinated application strategy, to protect sensitive electronic equipment, in industrial, commercial and residential locations. This device will divert damaging voltage transients, or surges, away from electronic equipment offering protection against catastrophic failure, costly downtime and data disruptions.


What's Included

  • 1x - Leviton 51120-1 Panel Mount Whole Home Surge Protector and Supressor
  • More Info

    The Leviton Branch Panel Mounted Transient Voltage Surge Suppressor (TVSS) devices are designed to protect residential as well as small commercial establishments from high voltage transients. Standardized J-Box metal enclosure with pre-punched standard size knockouts simplifies flush mounting in typical frame construction environments, and provides convenient connection means to existing branch panels. Some of the features are:

    Additional Features
  • Tested to ANSI/IEEE C62.41 standards
  • Single high-energy solid-state semiconductor surge suppression circuitry per phase
  • Real-time diagnostic visual indicator shows power and suppression status for each protected phase
  • Each phase provided with independent thermal fuse protection
  • Feature a low VPR to ensure protection of sensitive electronic devices including LCD TVs, PDAs and computers
  • Standard J-Box enclosure with pre-punched standard knock-outs can be easily surface mounted in typical frame construction
  • Internal DIN rail module provides for easy replacement (on Type 1 outdoor unit only)
  • All versions are compatible with Leviton Decora Home Controls

  • Protection for whole-house lighting control systems
    While this whole house surge suppressor is great for protecting computers, TVs and other electronics, it can also protect against damage to lighting control systems such as INSTEON, X10, or Z-Wave. Voltage spikes of several hundred or even thousands of volts generated by outside sources do occasionally occur. We know of customers that have had several X10 components fail simultaneously for no apparent reason except for one clue, home control components that happened to be plugged into a surge suppressor/surge protector power strip were still functional.

    If you are going to be using a significant number of remote control light switches in your home, adding a whole house surge protector will give you a good insurance policy against costly damage to both your home control system and other delicate electrical equipment in your house.

    We recommend that whole-house surge protector units be installed by a licensed electrician.

    This latest version of the Leviton Whole-House Surge Suppressor has greatly increased surge handling capacity. This surge protector unit is an essential component when installing extensive whole-house lighting control systems. LEDs on the panel show operation status.

    Installation Connections:
  • J1=L1
  • J2=L2
  • J4=Neutral
  • J5=Ground

  • Specifications


    Manufacturer Product No.:51120-1
    Voltage Configuration:50kA
    Surge Counter:No
    Disconnect Switch:No
    Enclosure Rating:NEMA 1
    Protection Mode:4-Mode
    AC Noise Rejection:N/A
    Standards and Certifications:UL1449 / CSA / ANSI/IEEE Cat ABC
    Warranty:5 Year Limited

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.


    148 Ratings
    5 star: 70%  (104)
    4 star: 20%  (29)
    3 star: 5%  (8)
    2 star: 2%  (3)
    1 star: 3%  (4)
    Average Customer Rating
    (148 customer ratings)
    Share your thoughts with other customers
    JEFF -- raleigh, NC   2/16/2014
    Had them professionally installed. Assume that they are now protecting the whole house.
    GEORGE -- pottstown, PA   1/30/2014
    The unit looks to be very solid.I didn't like the way the terminals were positioned. I used #10 gauge solid wire and it was difficult getting the unit in the box and secured. Beside that nice finish product.
    THOMAS -- hansville, WA   12/14/2013
    Easy to install for an electrician. Does what it is suppose to do. Looks good in the wall under the CB panel. What more is there?
    TIMOTHY -- decatur, GA   10/20/2013
    Seems well built and is as described. I can't speak to its functionalty as I haven't had a power surge to test it. I would imagine it will have to be replaced when that happens, so the real test will be whether I have to replace anything else with it.
    RUSSELL -- morgantown, WV   10/14/2013
    Picking this up for a second home after getting one for my primary house many years ago.
    Paul L -- Ma.   9/27/2013
    I have my computers, and hiend stereo to worry about which are over $25k I had this Leviton box installed, we have had the tv and power go out due to lightening in the area, but Never a piece of equipment ruined!!
    Czar -- arlington, WA   8/4/2013
    To provide the best protection, should be installed closest to the incoming power leads - that way it takes the hit prior to other circuits.
    JORGE A. -- miami, FL   6/28/2013
    I installed it but I hope to never use it. Just like an insurance policy.
    CLINT E. -- bakersfield, CA   5/30/2013
    Excellent service and product, fast delivery
    BRIAN F. -- ranchos de taos, NM   4/27/2013
    Our elecrician was familiar with this particular unit, gave it the highest rating in comparison to other similar units. It only took him 30 minutes to install to our main elect. panel box.
    BRUCE -- dublin, OH   4/18/2013
    Easy to install; will have to wait for surge to see how it works
    ATL Home Owner -- atlanta, GA   4/13/2013
    My wife and I have purchased this product today. Last week we had a bad stormed that damaged our refrigerator. Prior to that, we had to replace our HVAC unit, washing machine and two TV and one computer due to the location of our home near a electrical home terminal line. The power company told us they are not liable for surges, spikes and brown-outs. That being said, we proactively taken action to protect our appliances. We hired a professional electrician to do the install. Hopefully this will help us this summer.
    JOHN -- belen, NM   3/31/2013
    We have a lot of terrible lightning storms in the summer. In 2006 lightning struck very near our house. There was an instantaneous flash/bang. Luckily we didn't have a direct hit. As it was it knocked out our doorbell transformer, our telephones and our irrigation controllers. We also have a lot of very expensive electronic equipment. I had the suppressor installed the day after I got it. The electrician thought it was a good buy too.
    DONALD -- portland, OR   3/28/2013
    The rating is on the order and company. I hope it never has to work. Price and service we're top notch.
    ROBERT -- van buren, AR   3/18/2013
    We haven't installed it yet.
    JOHN -- frisco, TX   12/30/2012
    Easy to install. Gives a new sense of security in today's age if electronics.
    DIPTOTECH -- frisco, TX   12/29/2012
    So far a great product. Not sure if I will be able to test it out till a surge happens but my sales experience with smarthome is great. Product was as advertised.
    Mark from NY -- sebastin, FL   12/22/2012
    Purchased this product last week. My electrician said it was a better price than he could get it for. They shipped it fast and it seems to work, time will tell.
    DOUGLAS -- porter rnach, CA   11/7/2012
    Good product, good price, quick delivery
    STAN -- gordonville, PA   10/28/2012
    Very pleased with purchase and delivery of product. Relatively easy to install on side of breaker panel. Only question is the surge ratings are not complete on front of unit. Still wonder if this is capable of 50kA surge.

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