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Tripp Lite IS250 Isolation Transformer 250W Surge 120V 2 Outlet 6 feet Cord TAA GSA

3.8 out of 5 stars 42 customer reviews
| 9 answered questions

Was: $114.11
Price: $108.68 & FREE Shipping. Details
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  • Surge suppression: 2.1 A
  • No. of outlets: 2
  • Power: 120 VAC, 60 Hz
  • Max power capacity: 250
  • Dimensions (" W): 4.5
22 new from $89.99

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$108.68 & FREE Shipping. Details Only 9 left in stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Tripp Lite IS250 Isolation Transformer 250W Surge 120V 2 Outlet 6 feet Cord TAA GSA
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  • Ebtech Hum X Voltage Hum Filter
Total price: $160.09
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Technical Details

  • Brand Name: Tripp Lite
  • Model Number: IS-250
  • Item Height: 4.5 inches
  • Item Length: 7.75 inches
  • Item Width: 4.75 inches
See more technical details

Product Description

Product Description

Isolation transformer design serves as an alternative to installing dedicated circuits and electrical upgrades. Remove EMI/RFI noise, utility switching transients, background spikes, and power, problems generated by other onsite loads, utility grid-switching, and lightning related surges. Surge suppression components offer continuous line filtering of a full range of power line noise in all modes. Transformers feature NEMA 5-15P input and NEMA 5-15R output outlets. Complete line isolation, noise filtering, and surge suppression Faraday Shield offers 100% isolation from input AC line

From the Manufacturer

Utility power problems like EMI/RFI line noise, surges and background spikes can destroy equipment, damage crucial data and lead to critical system failures. Protect your sensitive devices and prevent power disruption with Tripp Lite's Isolator IS250 Power Conditioner. Featuring an internal isolation transformer with a Faraday Shield, the IS250 completely isolates equipment from line noise that can cause incremental, but devastating, equipment damage. Its 680-joule surge suppression rating protects equipment from surges and spikes caused by utility power disruptions and the operation of nearby equipment on the same circuit. With 100% isolation, the IS250 eliminates the need for dedicated circuits and costly site electrical upgrades. Its six-foot power cord allows for flexibility when installing, while the built-in circuit breaker prevents dangerous circuit overloads. 250 watts of capacity allow for use with a variety of sensitive electronics like point-of-sale equipment, diagnostic testing devices, telecom systems and more. The widely spaced NEMA 5-15R output receptacles fit any standard input plug and the lighted power switch offers convenient, one-touch power control. For peace of mind, the IS250 features a rugged, all-metal housing and comes with a two-year warranty.

Key Features

Isolator™ IS250 Isolation Transformer-Based Power Conditioner:
  • Fully isolated protection with enhanced surge suppression and noise filtering for point-of-sale equipment, telecom systems, diagnostic testing devices and other sensitive electronics
  • Isolation transformer with Faraday Shield offers 100% isolation from the input AC line, removing harmful EMI/RFI noise, utility switching transients and background spikes
  • 250-watt continuous capacity with 2 standard NEMA 5-15R output receptacles
  • 680-joule surge suppression rating
  • 6-ft. power cord provides installation flexibility
  • Circuit breaker provides overload protection
  • Convenient, lighted power switch for simple power control
  • 2-year warranty
IS250 Application
Completely Isolate and Protect Valuable Equipment for Less
Click here for a larger image
Completely Isolate and Protect Valuable Equipment for Less

By isolating equipment from unpredictable and disruptive utility power, the IS250 eliminates the need for dedicated circuits or costly upgrades to your site's electrical systems. The internal isolation transformer with Faraday Shield provides 100% isolation from the AC power line for equipment plugged into the IS250 Power Conditioner. The IS250 is perfect for protecting sensitive point-of-sale, telecom and diagnostic equipment that can be affected by EMI/RFI line noise, utility switching transients, background spikes and other unpredictable power conditions.

High-Capacity with Robust Features

The IS250's 250-watt capacity can handle a variety of devices, while features like a 680-joule surge suppression rating, integrated circuit breaker and powerful line noise filtering provide ultimate protection and safety in even the most dangerous conditions. With its continuous transformer filtering and no wearable parts, the IS250 reduces surges in the worst power environments to harmless levels.

Convenient, User-Friendly Operation

A 6-ft. cord allows for flexible installation, while two NEMA 5-15R output receptacles let you plug your standard equipment into the IS250 without any adapters or custom power cords. Operation is easy; simply plug the IS250 into a grounded three-prong utility outlet, plug your equipment into the IS250 and turn the power on. The lighted power switch allows for simple one-touch power control of all connected equipment.

Peace of Mind

The IS250 is compliant with RoHS and TAA standards and also comes with a two year warranty.

What's in the Box

• IS250 Isolation Transformer System
• Instruction Manual with Warranty Information

Technical Specifications

Tripp Lite's Isolator™ IS250 Isolation Transformer-Based Power Conditioner:
Amp Capacity: 2.1A at 120V AC
Efficiency: 96%
Form Factor: Small tower format, wall mountable
Input Plug Type: NEMA 5-15P
Let-through Voltage (Combination Wave): L-N: <130V L-G: <10V N-G: <0.5V IEEE C62.41 Cat. B
Let-through Voltage (Ring Wave): L-N: <10V L-G: <10V N-G: <0.5V IEEE C62.41 Cat. A
Noise Suppression Rating: 33-65dB normal mode; >80dB common mode
Nominal Voltage / Frequency: 120V / 60Hz
Output Receptacle Qty / Type: 2 NEMA 5-15R
Over Current Protection: Yes, 2A circuit breaker
Suppression Joule Rating: 680 Joules
Surge Test Conditions: Per ANSI/IEEE C62.41 - (IEEE587) Cat. A & B test waveforms
Total Harmonic Distortion: less than 1%
Transformer Type: Low-impedance isolation transformer
VA / Watt Capacity: 250
Input cord length (ft.): 6
Cooling method: Convection
Unit Dimensions (HWD/in): 4.75 x 4.75 x 7.5
Unit weight (lbs): 12.8
Product Warranty Period (Worldwide): 2-year limited warranty
MiniCom by Tripp Lite
Isolator Power Conditioners
Capacity 250 W 500 W
Outlets 2 NEMA 5-15R 4 NEMA 5-15R
Cord 6 ft. 6 ft.
Surge Suppression 680 Joules 680 Joules
Warranty 2-year 2-year

Tripp Lite Protects, Connects and Organizes All Electronics

Shop Tripp Lite

Tripp Lite has been a trusted manufacturer of innovative solutions since 1922. With more than 2,500 different products, including UPS systems, rack systems and cooling solutions, PDUs, PowerAlert software for enterprise-level system management and control, surge suppressors, KVM switches, cables and connectivity products, inverters, power strips and notebook accessories, Tripp Lite offers the complete solution to almost any IT application.

Tripp Lite UPS Systems

Tripp Lite's UPS Systems are the most reliable and cost-effective solution available for protecting and supporting critical equipment in any environment. With capacities from 350VA to 80kVA, Tripp Lite UPS Systems can protect critical systems from desktop to data center. SmartPro ® Line Interactive models offer Advanced Automatic Voltage Regulation that keeps equipment working through low voltage indefinitely without draining battery power. Top-of-the-line SmartOnline™ models offer true, on-line, double-conversion operation with pure sine wave output to keep equipment totally isolated from power problems.

Tripp Lite Surge Suppressors

From basic to premium, Tripp Lite's surge suppressors offer powerful protection for all electronics. Protect It™! Surge Suppressors provide convenient AC outlets and safeguard connected equipment from damaging surges, spikes and line noise. Tripp Lite's Isobar® models are the world's best-selling premium surge suppressors, with over 18 million in use.

Tripp Lite Rack Enclosures

SmartRack™ Rack Enclosures from Tripp Lite organize and protect rackmount servers, storage and network/telecom equipment quickly and conveniently. Racks are available in a variety of form factors including standard with doors and side panels, wall-mount, open frame and specialty configurations.

Tripp Lite Power Distribution Units

For reliable rackmount power distribution in high-density IT environments, look no further than Tripp Lite. Tripp Lite's Single- and 3-Phase PDUs come with available features like vertical or horizontal rackmount configuration, digital load meters, network interface, remote outlet control, individually breakered load banks, automatic transfer switching, hot-swap capability and more.

Tripp Lite KVM Switches

Control your entire network from a desktop or 1U of rack space! Tripp Lite KVM switches allow you to control multiple servers via one keyboard, monitor and mouse. With models that control from two to 512 computers or servers, Tripp Lite has the KVM solution for any network application.

Tripp Lite Cables and Connectivity

Tripp Lite offers a comprehensive line of cables, adapters, splitters, switches and extenders, including network (copper and fiber-optic), display (HDMI, DVI, VGA, DisplayPort), audio/video, USB, FireWire®, power, storage and more. Tripp Lite's connectivity solutions offer everything you need to get your network, digital signage, audio/video or power application up and running.

Product Information

Product Dimensions 7.8 x 4.8 x 4.5 inches
Item Weight 7.9 pounds
Shipping Weight 13.2 pounds (View shipping rates and policies)
Manufacturer Tripp Lite
Item model number IS-250
Customer Reviews
3.8 out of 5 stars 42 customer reviews

3.8 out of 5 stars
Best Sellers Rank #18 in Industrial & Scientific > Industrial Electrical > Wiring & Connecting > Isolation Transformers
Discontinued by manufacturer Yes
Date first available at Amazon.com May 28, 2006

Technical Specification

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By G. Conner TOP 500 REVIEWER on April 6, 2010
Verified Purchase

After decades of research, trials, errors, marketing hype and outright advertising lies, I have found the answer to 60-cycle hum. This isolation transformer works perfectly.

As a professional guitarist, I have LONG known the grief and hassle caused by bad wiring in nightclubs, studios and my homes. I have tried EVERY CONCEIVABLE method for reducing hum and noise from my equipment: shielding, "noiseless" pickups, expensive amps, mixers, power-conditioners and egregiously-overpriced cables. NONE of those things worked.

Luckily, My wife is an electronic engineer. She suggested that the little "hum-x" I got from Ebtech was simply too small to do any meaningful isolation. I looked high and low, then found this Trip-Lite brand here on Amazon. The price was right so I ordered it, knowing Amazon's return policy is fair in case it didn't work.

It arrived today. I plugged in it to the wall, then plugged my noisiest, cheapest guitar amp into the back of the transformer.

At first, I though I must have hooked it up wrong, because there was absolutely ZERO hum. I checked the cables. Nope. Everything was right. I plugged in a guitar. Nothing. No noise. No hum.

Then I turned the guitar up full. Still no noise. When I strummed a chord, it startled the daylights out of me. The guitar was up full, the amp was up full. Still ABSOLUTELY ZERO HUM.

I have been searching for an answer to this pernicious ubiquitous problem for over 40 years.
This thing is worth it's weight in gold to me now. I lost two expensive pieces of gear just last month: one Kurzweil keyboard and a Mackie mixer, when the poor wiring in a local nightclub fried them.
Read more ›
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Verified Purchase
I purchased this to eliminate EMI/RFI line noise in the AC circuit that was being used for an electronic drum set in a professional live sound situation. In testing, it indeed did eliminate EMI/RFI line noise from the hot line. However I also had noise in the neutral and ground line which this unit is incapable of removing because of the way it is wired internally. After changing the internal wiring, it eliminated all EMI/RFI line noise from all three lines.

There are You Tube videos describing how to change the internal wiring on this particular unit and it's not hard to do at all if you are electrically inclined. If not knowledgeable or comfortable with household type high voltage AC electricity, probably best not to attempt it. However if you buy this, it doesn't solve your problem, and you don't feel confident in modifying it Amazon will let you return it for a refund (I think within 30 days...) even if there is nothing actually wrong with the product itself. So it can't hurt to try!
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I bought this product to help with working on power supply circuits. I wanted it to provide isolation from ground after being shocked once too often. Unfortunately this product has the output neutral line tied to ground, which makes it useless for this purpose. This can be easily corrected by disconnecting one wire inside, so I'm still giving it 3 stars because it works very well once that is done. Its also well made and provides good isolation from RF noise.
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Verified Purchase
Great if you want to eliminate a nasty ground loop (60 Hz buzz in your audio system) or isolate some test equipment. Appears to be well made. It is very heavy -- so buying online I'm sure includes the high cost of shipping (either directly or indirectly in the price). Price-wise it may be better if you cand find it at a local electronics supplier or audio store.
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Verified Purchase
I had a plasma TV that emitted a loud, intermittent buzzing noise from the rear panel that bugged me for years. I always had a hunch that the buzz was being caused by interference coming through the wall outlet, but I wasn't able to pinpoint the source. Living in an apartment complex, I don't have control over all the various electrical devices and appliances in neighboring units that could be causing interference in the wires, so troubleshooting was difficult for me.

Eventually I sold the plasma and purchased a 46" LCD TV to replace it. I had an understanding that all plasmas are inherently prone to buzzing, so I thought that I'd be able to escape this problem with an LCD. But after setting up my brand new LCD and plugging it in for the first time, I was horrified to discover that it emitted the same buzz!

After doing some research on isolation transformers, I decided to try this out to see if it would solve the problem. I'm happy to report that it does. The rear panel of the TV is totally silent when it's plugged into the IS250. If I switch the TV back to the wall outlet, the buzzing returns. The isolation transformer does its job.

The device itself is very heavy and well-built. Everything about it screams quality. It seems that these are being made in a dark gray color now, so while the one I received doesn't match the picture on Amazon, I think it looks better anyway.

Needless to say, I'm really happy I discovered this thing!

Note: There's a big difference in power consumption between Plasma TVs and LCD TVs. My 42" plasma could consume up to 400 watts, so a bigger isolation transformer would have been necessary for that. My LCD consumes around 120 watts, so the IS250 can handle it.
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