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    About Us

Tortran™ is a registered trademark of Bridgeport Magnetics Group, Inc. located in Shelton, Connecticut.

Bridgeport Magnetics Group, Inc.

Bridgeport Magnetics Group focuses in the design and manufacturing of toroidal isolation and power transformers and toroidal inductors. Nearly all of our lines employ cores made of grain oriented silicon steel strips, powder iron or ferrite.

Since no special tooling is required when winding toroidal isolation transformers or toroidal inductors, many of our customers have found that our full custom designed transformers and inductors can be less expensive than using a standard design, even in quantities as low as 100 pieces. Full Custom design toroidal power transformers are available up to 20,000 VA. For large volume requirements, we work closely with our Chinese partner to be able to offer you highly competitive prices.

 

    Our proprietary, programmable, high-speed toroidal winding machinery helps us offer low prices for small to medium size orders of toroidal inductors and transformers or other products. Our low factory overhead and overall efficiency in our manufacturing operation also contribute to our price competitiveness.

    Our CUSTARD™ line of toroidal power transformers are based on our stock of standard cores already wound with 117/234V, 50/60Hz primaries and ready for secondary winding(s) and termination as specified by you.

    In addition to using regular toroidal cores wound from strips of constant width grain-oriented silicon steel, you may want to consider toroidal transformers and inductors wound on the new O-Core, made from the same quality of silicon steel. Its circular cross-section reduces the overall size and weight of the finished toroidal power transformer or inductor. Depending on the VA rating, you will find a 15 to 30% reduction of overall size. Use the O-Core link to see comparison charts of physical dimensions and electrical characteristics, listing our new O-core transformers, regular toroidal transformers and conventional E-I transformers.

    Thank you for your interest in our product line!

    Ulrik Poulsen, Founder and CEO


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