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Isolation Transformer Sales


Welcome to Isolation Transformer Sales!

Lowest Price on Quality Isolation Transformers - Guaranteed!

Your source for high quality power isolation transformers at wholesale prices.  Fill out the form below or give us a call to get a quote on your transformer needs.  Whatever type of isolation transformer that you need - we can supply it: line isolation transformers, drive isolation transformers, 3 phase isolation transformers, medical grade isolation transformers, or a custom isolation transformer built to your specifications, just let us know.  

European Transformer Guide

What is an isolation transformer?

An isolation transformer, which often has symmetrical windings, is used to decouple two circuits. An isolation transformer allows an AC signal or power to be taken from one device and fed into another without electrically connecting the two circuits. Isolation transformers can be used to block transmission of DC signals from one circuit to the other, but allow AC signals to pass. They will also block interference caused by ground loops. Isolation transformers with electrostatic shields are used for power supplies for sensitive equipment such as computers or laboratory instruments. 

Widest Range Of Isolation Transformer Supplies

Our wide range of high quality isolation transformers includes brand names such as GE Industrial Transformer, Marcus Transformer,  TEMCo Transformer, Federal Pacific Transformer, Hammond Transformer, and Acme Transformers with stock models with capacity ranges 0.05 kva through 5000 kva. Let us help you select the best isolation transformer for your needs.

Standard Isolation Transformers
Isolation Transformers have primary and secondary windings that are kept physically separate. Sometimes isolation transformers are called "insulated transformers". This is because the primary and secondary windings are insulated from each other.

In an isolation transformer the output winding will be isolated, or floating from earth ground, unless bonded when it is installed.

Shielded Isolation Transformers
Shielded isolation transformers have all the features of the standard isolation transformers plus they also incorporate a full metallic shielding (this shielding is often copper or aluminum) between the primary and secondary windings.  These shielded isolation transformers are then referred to as electrostaticly shielded isolation transformers. The electrostatic shield ("Faraday Shield") is connected to earth ground and performs two functions:

1) It filters (attenuates) voltage spikes (voltage transients). These shielded isolation transformers have an attenuation ratio of 100 to 1.

2) It filters common mode noise. This is usually an attenuation of approximately 30 decibels.

Shielded isolation transformers are preferred over standard isolation transformers because it provides protection for sensitive and critical equipment.

When more than one shielded isolation transformer is installed between the source and the load, this is referred to as "cascading" and vastly improves power quality.

Most all of the Acme and TEMCo general purpose isolation transformers 250 VA and larger are shielded at no added cost as a standard feature. Shielded TEMCo isolation transformers have an "s" as the last digit of the part number.

All of the transformers that we carry provide quiet reliable long lasting operation. Call TEMCo directly to get model and sizing info at 1-510-490-2187.

We have experience manufacturing, selling and maintaining isolation transformers over the years since 1968. All our electrical products are made to the highest quality standards and are backed by our industry leading warrantees. 

Call for your Isolation Transformer Quote

Call today!
 1-510-490-2187 (US and International) or 
1-800-613-2290 (US Only)



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 Hot Deals!
Wholesale prices on high quality isolation transformers direct to the public. Call today 1-510-490-2187 (US and International) or 1-800-613-2290 (US only).


 Request Your Quote!
You can easily request an isolation transformer quote by clicking this link and filling out the quote request form below.  We offer both stock and custom isolation transformers shipped worldwide daily.


 Worldwide Shipping!
We can ship transformers from our regional warehouses to speed up the shipping time frame.  We also offer fast turnaround on custom built transformers, built to your needs.   


 Custom Transformers!
We can custom build isolation transformers to your specifications with a very fast turnaround.  Most isolation transformers can are in stock but when you need a custom built model we can offer have it built in just days. 


 Great Support!
Our experienced team of isolation transformer specialists are here to assist you with both excellent presale support and after-sale support.  Give us a call and we will help you select the model that meets your needs.


 Large Inventory
Because we both manufacture isolation transformers and carry all the brands you can rely on us as your one-stop source for high quality isolation transformers at wholesale prices.  Because of this we offer one of the largest inventories of isolation transformers.  What other companies have to custom build we probably keep in stock.  Call to order today!   


 Other Products
While shopping for your electrical products if you should also need a phase converter consider the TEMCo brand.  They manufacture the very best quality and are also recommended by the US Phase Converter Standards Organization for their quality rotary phase converters.  In addition to custom transformers and phase converters TEMCo also manufacture top rated frequency converters.    






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