free shipping at parts express

Tripp Lite ULTRABLOK428 Plug-In Surge Protector

Brand:|Model: ULTRABLOK428|Part # 125-006
Duplex outlet surge protector rated at 600 joules of supression. The UltraBlok 428 is the perfect partner for your powered subwoofer.
In Stock
- Order Soon - Only 3 Left In StockMore Due In February 13, 2016
List Price$37.60
You Save27%
Your Price
Part # 125-006
  • 2 AC outlets
  • 600 joule rating
  • Perfect partner for powered subwoofers
  • $10,000 Ultimate Lifetime Insurance

Product Details

Tripp Lite ULTRABLOK428 Plug-In Surge Protector

Robust surge suppression circuits with sine wave tracking offer extreme levels of protection against the heaviest surge conditions. Isobar's unique protection system combines large torroidal chokes, HF/VHF capacitors and multiple metal oxide varistors that remove high-level surges and EMI/RFI interference. UltraBlok 428 offers 2 outlets arranged with standard wall socket spacing in a cordless direct plug-in format. Mounting tabs allow permanent connection via duplex switchplate screw. Surge suppression rated at 600 joules/48,000 amps offers high-grade protection. Diagnostic LEDs confirm power availability, line fault and protection status. Lifetime warranty with $10,000 Ultimate Lifetime connected equipment Insurance (USA & Canada Only).

Specifications: • Output capacity: 1800 watts • AC suppression: 600 joules • Clamping voltage: 140V RMS • AC suppression response time: Less than 1 nanosecond • EMI/RFI filtering: up to 80 dB • Dimensions: 4" H x 2-1/2" W x 2-1/2" D. Certifications: • UL1449 1998 Rev. (AC Suppression) • UL1283 (EMI Filter) • cUL / CSA (Canada) • Exceeds IEEE 587 category A&B specifications.

Product Specifications
  • Number of Outlets2
  • Cord LengthWall-Mount
  • ColorBlack
Tripp Lite ULTRABLOK428 Plug-In Surge Protector
  • BrandTripp Lite
  • ModelULTRABLOK428
  • Part Number125-006
  • UPC037332010476
  • Product CategoryOutlet Strips & Surge Protectors
  • Unit of MeasureEA
  • Product Rating
    (3 Reviews)
  • Weight0.74 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Tripp Lite ULTRABLOK428 Plug-In Surge Protector
in the Outlet Strips & Surge Protectors product category.


Tripp Lite ULTRABLOK428 Plug-In Surge Protector
Tripp Lite ULTRABLOK428 Plug-In Surge Protector is rated 4.6667 out of 5 by 3.
Rated 5 out of 5 by from Very Nice ProductI am using this to plug in my receiver and it definitely works well. I didn't want to overdraw on my Tripplite Isobar so I decided that I could plug my reciever into another outlet and this little gem allows me to do just that and still be protected. You can't beat it for the price.
Date published: 2012-03-28
Rated 5 out of 5 by from well built protector suited well to my needsI bought this to protect a laptop that stays plugged into an outlet next to the couch in my living room a lot. I went with the TrippLite because I've had good experience with them over the years at work and at home. I recently bought the TrippLite HT10DBS at PE for my home theater system and was happy with the quality of the construction of it in all regards (Like it better than the Monster it replaced). As some have noted this does protrude from the outlet a fair amount but that is not an issue for me. Looking at the photo the construction seems pretty obvious so this was no surprise. For this price I don't think I'd find anything more suited to my needs and certainly not of this quality. There just are not nearly enough things I buy these days that I can say that about.
Date published: 2012-02-25
Rated 4 out of 5 by from all you really needThis product has all of the features you need for typical home entertainment protection. While not boasting large numbers in its protection statistics, it does meet all of the industry's minimum requirements. It even alerted me to the fact that my outlet was not wired correctly. Simple in its design and use. And it will let me know when the protection feature is not working.
Date published: 2008-01-29
  • 2016-02-08T06:47CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_en_US, sid_125-006, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
Tripp Lite ULTRABLOK428 Plug-In Surge Protector

If an AC power conditioner w/ several A/V sources plugged into it and it was plugged into this surge protector, would there be any degradation induced into A/V system?  Has anyone used the ULTRABLOK428 in such a configuration with no issues?

Asked by: GWDAV
  • 2016-01-22T07:28CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasquestions, tq_1
  • loc_en_US, sid_125-006, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational

Recently Viewed Products

Parts Express FacebookParts Express TwitterParts Express YouTubeParts Express PinterestParts Express SpotifyParts Express Instagram
Live Chat Software