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expired Posted by jmabi • Jun 9, 2023
expired Posted by jmabi • Jun 9, 2023

Tripp Lite Isobar Ultra 8-Outlet Surge Protector Power Strip w/ 12' Cord

+ Free Shipping

$54

$73

26% off
Amazon
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Update: This deal is still available and with a slightly lower price.

Amazon has Tripp Lite Isobar Ultra 8-Outlet Surge Protector Power Strip w/ 12' Cord on sale for $54.92 -> Now $54.41. Shipping is free.

Walmart also has Tripp Lite Isobar Ultra 8-Outlet Surge Protector Power Strip w/ 12' Cord on sale for $54.92 -> Now $54.41.. Shipping is free.

Thanks to community member jmabi for finding this deal.

Product Details:
  • 3840-joule surge protection rating
  • EMI/RFI noise filtering protects against outside interference
  • Isolated filter banks protect against internal interference
  • 12-foot AC input cord with 5-15P right-angle plug

Editor's Notes

Written by oceanlake | Staff
  • Comes with a limited lifetime warranty.
  • This surge protector has received an average rating of 4.8 stars out of 5 based on over 1,600 Amazon customer reviews.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by jmabi
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This deal is still available and with a slightly lower price.

Amazon has Tripp Lite Isobar Ultra 8-Outlet Surge Protector Power Strip w/ 12' Cord on sale for $54.92 -> Now $54.41. Shipping is free.

Walmart also has Tripp Lite Isobar Ultra 8-Outlet Surge Protector Power Strip w/ 12' Cord on sale for $54.92 -> Now $54.41.. Shipping is free.

Thanks to community member jmabi for finding this deal.

Product Details:
  • 3840-joule surge protection rating
  • EMI/RFI noise filtering protects against outside interference
  • Isolated filter banks protect against internal interference
  • 12-foot AC input cord with 5-15P right-angle plug

Editor's Notes

Written by oceanlake | Staff
  • Comes with a limited lifetime warranty.
  • This surge protector has received an average rating of 4.8 stars out of 5 based on over 1,600 Amazon customer reviews.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by jmabi

Community Voting

Deal Score
+64
Good Deal
Visit Amazon

Price Intelligence

Model: Tripp Lite ISOBAR8ULTRA Isobar 8 Outlet Surge Protector Power Strip, 12ft Cord, Right-Angle Plug, Metal Lifetime Limited Warranty & Dollar 50,000 Insurance White

Current Prices

Sort: Lowest to Highest | Last Updated 7/5/2025, 11:53 PM
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Amazon$95.99

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Top Comments

PetSpy
6601 Posts
2513 Reputation
just a suggestion... if you are spending this much money
on some glorified surge protector, you may as well buy a;
https://www.amazon.com//dp/B00009RA60
line conditioner, which is superior to ANY surge suppressor
as it also adds brown out protect which is very common.
these will remain effective forever, while surge protectors
lose their their rating over the years. i bought this 600w
https://www.youtube.com/watch?v=29MBmnGYBQo
30 years ago for $100 and it's been flawless ever since,
protecting all my home network and AV equipment.
MWink
2130 Posts
3139 Reputation
I've read about this before but it's been a long time, so I don't remember most of the details. I believe there are different ways they get rated, which is why you see differences between the specs and the numbers stamped on the back of the units. There's also the issue of what absolute voltage they clamp at and how much excess voltage they let through before clamping. You have to remember that 120V RMS has a peak of 170V. You can't have a clamping voltage lower than the peaks of the sine wave, or else it would clamp on every cycle.

Additionally, as MOVs (the surge protection component) wear out, the clamping voltage drops. If/when the clamping voltage drops below the peaks of the sine wave, it will start clamping when there is not a surge, leading to a positive feedback loop and thermal runaway. This is one of the reasons surge protectors sometimes catch fire. Modern surge protectors are required to have thermal fuses, to reduce the likelihood of this. The point is, all else being equal, a MOV with a lower clamping voltage will fail quicker than one with a higher clamping voltage. It will both be suppressing milder surges and have less room for degradation before failure.

As you brought up, the clamping voltage (and joule rating) can also be different between legs. Unlike hot-neutral and hot-ground, neutral-ground should have less/no difference in potential between them (0V). This is not always the case, especially in improperly wired circuits. The level of protection provided does often differ between the various legs. Surges are less likely neutral-ground, so there's usually less protection there. Hot-neutral and hot-ground are the bigger concern.

As for the product you linked, it looks like a slightly lower end unit. It doesn't appear to be of their flagship Isobar/Isotel line. It lacks the isolated filter banks and metal casing. It may also have weaker surge protection. It does have RJ11 (telephone) protection but not many people still have conventional landlines. I would spend the extra on the Isobar in this deal.
MWink
2130 Posts
3139 Reputation
This is not correct and even the video you linked partially mentions it. Line conditioners (and UPSs) use the same sacrificial MOVs as surge protectors. Not only that, they often have fewer than you'd find in a good surge protector. The unit in the video only appears to have 5 MOVs. I've seen high end APC and Tripp-Lite surge protectors with at least 6-10. That also doesn't get into the joule rating and clamping voltage, which can also be better in a good surge protector.

People often overestimate what a line conditioner or UPS does, probably due to good marketing. A line conditioner is usually simply a mediocre surge protector combined with a 2 or 4 stage AVR. As demonstrated in that video, that model has 4 discrete AVR modes (2 boost and 2 buck). This will boost or trim the incoming voltage by a certain percentage. As he shows, it does NOT guarantee a constant 120V. An AVR is really only useful if use experience frequent, prolonged mild/moderate undervoltages or overvoltages and have equipment that is sensitive to them. Many modern switching power supplies are already designed to accept voltages in this range. I don't think line conditioners are particularly useful for the average person. Depending on your needs, a good surge protector or a UPS is likely a better choice.

Unless they've changed, the Tripp-Lite Isobar Ultra is a high quality point-of-use surge protector. Like most other surge protectors you see for sale, it does use sacrificial MOVs that WILL eventually fail (even if it takes decades). If you want something that should last forever, you need to shell out big money for a series mode surge protector. Those are uncommon and expensive (I think about $200 for the most basic model).

For protection from surges originating from outside the house, a whole-house surge protector is the best choice. These provide far superior protection, due to their proximity to earth ground. Point-of-use surge protectors are still a good idea for surges originating inside the house.



If you're going to do that, it would be preferable to do it the other way around. Plug the power conditioner into the surge protector.

95 Comments

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Jun 10, 2023
1,313 Posts
Joined Sep 2017
Jun 10, 2023
manolobindo
Jun 10, 2023
1,313 Posts
Used to be in IT hardware support 20+ years ago in a rich, stuffy law firm where money was plentiful and these were our go-to for power strips. Are they still great and worth the money these days?
1
Jun 10, 2023
861 Posts
Joined Sep 2011
Jun 10, 2023
doctorwizz
Jun 10, 2023
861 Posts

Our community has rated this post as helpful. If you agree, why not thank doctorwizz

They are weak at 12amp. You will hear loud buzzing! Not the best anymore sadly.
1
5
Jun 10, 2023
9,179 Posts
Joined Aug 2018

This comment has been rated as unhelpful by Slickdeals users.

Jun 10, 2023
147 Posts
Joined Oct 2014
Jun 10, 2023
proudx
Jun 10, 2023
147 Posts
Quote from TodayOnly :
nope, yestredays tech.
Just curious what makes this yesterday's tech? It's ul1449 latest revision with a super low clamping voltage. What causes the buzzing poor emi/rf or just the small 12amp internal breaker?
Jun 10, 2023
2,309 Posts
Joined Nov 2004

This comment has been rated as unhelpful by Slickdeals users.

Jun 10, 2023
1,507 Posts
Joined Nov 2018
Jun 10, 2023
CoreyR2384
Jun 10, 2023
1,507 Posts
These are about as good as is gets for interior surge protectors. Incredibly low clamping voltage and built like a tank. They're almost identical to the ones they make for hospitals. I have one mounted to the bottom of my desk. These do make a bit of noise, though. They whine at specific power draws. I can only faintly hear mine when my PC is turned off and I'm sitting at my desk, or if I need to go under the desk to plug something in. Otherwise, I never notice it.
Pro
Jun 10, 2023
6,601 Posts
Joined Sep 2013
Jun 10, 2023
PetSpy
Pro
Jun 10, 2023
6,601 Posts

Our community has rated this post as helpful. If you agree, why not thank PetSpy

just a suggestion... if you are spending this much money
on some glorified surge protector, you may as well buy a;
https://www.amazon.com//dp/B00009RA60
line conditioner, which is superior to ANY surge suppressor
as it also adds brown out protect which is very common.
these will remain effective forever, while surge protectors
lose their their rating over the years. i bought this 600w
https://www.youtube.com/watch?v=29MBmnGYBQo
30 years ago for $100 and it's been flawless ever since,
protecting all my home network and AV equipment.
Last edited by PetSpy June 10, 2023 at 08:53 AM.
8
1
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Jun 10, 2023
2,701 Posts
Joined Dec 2019
Jun 10, 2023
User18383921
Jun 10, 2023
2,701 Posts
Quote from PetSpy :
just a suggestion... if you are spending this much money
on some glorified surge protector, you may as well buy a;
https://www.amazon.com//dp/B00009RA60
line conditioner, which is superior to ANY surge suppressor
as it also adds brown out protect which is very common.
these will remain effective forever, while surge protectors
lose their their rating over the years. i bought this 600w
https://www.youtube.com/watch?v=29MBmnGYBQo
30 years ago for $100 and it's been flawless ever since,
protecting all my home network and AV equipment.
Can I plug in this tripp lite isobar or my furman into that power conditioner?
Jun 10, 2023
1,355 Posts
Joined Jan 2011
Jun 10, 2023
wuss
Jun 10, 2023
1,355 Posts
The orientation of plugs looks pretty non optimal. Anything that has a brick as a plug will block 2-3 plugs.
Jun 10, 2023
165 Posts
Joined Dec 2004
Jun 10, 2023
JustinMKN
Jun 10, 2023
165 Posts
Quote from PetSpy :
just a suggestion... if you are spending this much money
on some glorified surge protector, you may as well buy a;
https://www.amazon.com//dp/B00009RA60
line conditioner, which is superior to ANY surge suppressor
as it also adds brown out protect which is very common.
these will remain effective forever, while surge protectors
lose their their rating over the years. i bought this 600w
https://www.youtube.com/watch?v=29MBmnGYBQo
30 years ago for $100 and it's been flawless ever since,
protecting all my home network and AV equipment.
Thanks, will give it a shot. Have some sensitive speakers and occasional blue screen on the hardware due to a mini fridge in the room.
3
Pro
Jun 10, 2023
6,601 Posts
Joined Sep 2013
Jun 10, 2023
PetSpy
Pro
Jun 10, 2023
6,601 Posts
Quote from User18383921 :
Can I plug in this tripp lite isobar or my furman into that power conditioner?
the line conditioner should always be plugged into the wall.
you can plug anything into the line conditioner as long as
it's not a heating element or high amp motor, so you do
NOT plug a laser printer into this thing.
i just use plain power strips to add outlets to my line
conditioner, because using surge protectors is pointless.

Quote from JustinMKN :
due to a mini fridge in the room.
exactly why i have it... the conditioner protects everything from
the voltage dip of my fridge, AC and laser printer start up motor.
1
Jun 10, 2023
575 Posts
Joined Nov 2012
Jun 10, 2023
drblofeld
Jun 10, 2023
575 Posts
Quote from manolobindo :
Used to be in IT hardware support 20+ years ago in a rich, stuffy law firm where money was plentiful and these were our go-to for power strips. Are they still great and worth the money these days?
Not built like they used to. Moved to china for manufacturing and now they come with a loud buzzing sound.
4
Jun 10, 2023
82 Posts
Joined Dec 2007
Jun 10, 2023
nopointinnames
Jun 10, 2023
82 Posts
Quote from doctorwizz :
They are weak at 12amp. You will hear loud buzzing! Not the best anymore sadly.
Interesting, I own multiple and have never heard any buzzing at all. My certainly aren't loud, I've never put my ear right next to it which might let me hear a buzz. But there is no buzz standing over them.
Jun 10, 2023
100 Posts
Joined Jul 2007
Jun 10, 2023
ceevee
Jun 10, 2023
100 Posts
Read some reviews noting 330 or 350 clamping voltage. Can someone clarify? Is this the clamping voltage across all legs?

I'm also trying to understand the protection difference between this and another tripp lite TLP1208TEL: https://www.amazon.com/dp/B0036FS...dp_it&th=1
Last edited by ceevee June 10, 2023 at 02:12 PM.

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Jun 10, 2023
2,019 Posts
Joined Oct 2009
Jun 10, 2023
brossow
Jun 10, 2023
2,019 Posts
Quote from wuss :
The orientation of plugs looks pretty non optimal. Anything that has a brick as a plug will block 2-3 plugs.
That's why I keep a bunch of short extensions like these on hand (not this brand, but similar):

Kasonic 8 inch Short Power Extension Cord Outlet Saver, ETL Listed, SJTW 16AWG/13A 3 Prong Indoor/Outdoor Use, 4 Pack, Black https://www.amazon.com/dp/B09HSR3T8D
Last edited by nhbrsx June 11, 2023 at 01:23 AM.
1

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