• INTERTEK (ETL) CERTIFIED
  • UL Recognized
  • Made in USA
BRIDGEPORT MAGNETICS
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Distribution PowerTower Series

We are reimaging Power Infrastructure - Our PowerTower high-efficiency 3-phase toroidal transformers deliver exceptional efficiency, compact vertical design and ultra-quiet low-EMI operation up to 350 kVA - built for reliable performance in demanding industrial application

01 · Overview

Availability Coming Soon

The PowerTower platform is being configured for utility applications – EV charging, pad-mount replacements, and large isolation transformers – using the same stacked toroidal architecture that delivers up to 99% efficiency, roughly half the size and weight of conventional E-I units, far lower EMI, and near-silent operation. These market-specific designs are in R&D and testing now, with availability coming soon.

02 · By the Numbers

Compact. Efficient. Powerful. Toroidal Transformers for High-Density Applications

40%

Lower Energy Losses

50%

lighter than Traditional E-I Transformer

350 kVA

Designs up to 350kVA Power Rating

98-99%

Power Efficiency

03 · Specifications

Technical Specifications Available in both Single Phase and Three Phase. All models feature 480V primary to 208Y/120V secondary (standard). Custom voltages available upon request.

Single Phase Low Voltage Transformers

Model NumberRating kVAIDWidth (in)Height (in)Depth (in)Weight (lbs)
050-830-055F18.2522770
050-830-1010F18.25227130
050-830-1515D20.25289140
050-830-2525D20.25289190
050-830-3030B24.2531.7511.5220
050-830-4040B24.2531.7511.5290
050-830-5050B24.2531.7511.5335
050-830-7575C20.25609500
050-830-9090A24.2531.7511.5585
050-830-120120A24.2531.7511.5675
050-830-150150A24.2531.7511.5750
Three Phase Low Voltage Transformers
 
Model NumberRating kVAIDWidth (in)Height (in)Depth (in)Weight (lbs)
050-833-1515F18.25487180
050-833-3030F18.75487300
050-833-4545C20.25609320
050-833-7575C20.25609500
050-833-9090A24.2531.7511.5585
050-833-120120A24.2531.7511.5675
050-833-150150A24.2531.7511.5750
 
Built in Shelton, Connecticut

Let's build yours to spec.

Custom Transformers engineered and manufactured in the USA. Tell us your requirements and our engineers will help.

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Products
Toroidal transformers & magnetics — made in Shelton, CT since 1982
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3-phase toroidal power towers for industrial, BESS, and datacenter voltage management.
MarinePuck, Marine Isolation Transformer, Boat Isolation Transformer
MarinePuck™

ABYC-compliant, UL Recognized shore-power isolation in a corrosion-resistant puck design.
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IsoPuck™

Medical-grade isolation with ultra-low leakage current — IEC 60601-1 / UL 60601-1 compliant.
IsoPuck medical isolation transformer installed in hospital equipment Bridgeport Magnetics IsoPuck toroidal medical isolation transformer Toroid IsoBox medical isolation transformer Amgis medical isolation transformer toroidal design Hammond medical isolation transformer hospital grade Hospital grade medical isolation transformer for patient safety IEC 60601 medical isolation transformer for medical equipment Toroidal medical isolation transformer for hospital and dental use Low leakage current medical isolation transformer IEC 60601 Medical isolation transformer for dental chair and medical devices Compact toroidal medical isolation transformer 600VA to 3000VA IsoPuck IP600 medical isolation transformer IsoPuck IP900 medical isolation transformer IsoPuck IP1500 medical isolation transformer Toroid Corporation IsoBox isolation transformer Amgis Toroid medical isolation transformer Hammond Power Solutions medical grade isolation transformer Hospital isolation transformer for medical electrical equipment Medical grade isolation transformer with electrostatic shielding Low leakage IEC 60601 compliant medical isolation transformer, Custom toroidal transformer by Bridgeport Magnetics – high efficiency, low noise, and compact design for medical, industrial, datacenter, and audio applications, Custom toroidal transformer OEM using Laminax cuffed foil shielding laminates for automated winding production
Custom Toroidal Transformers

Custom-designed, 30 VA – 70 kVA. UL, CSA, CE, IEC 60601-1 certified.
Bridgeport Magnetics Group air-core foil inductor — high-purity copper foil wound on a Lexan tube with upright foil leads, precision crossover inductor made in Shelton, CT
Inductors & Chokes

Custom inductors, filter chokes, and power inductors — amorphous core, air-core foil, de-buzzing.
Cores & Core Components

GOSS toroidal, O-, C-, and E-cores — wound, heat treated, and epoxy coated.
Laminax cuffed foil shielding, toroidal transformer shielding, Cuffed Foil Shielding | Laminax™ Electrostatic Shielding Laminates for Transformers
Laminax™ Shielding Tape

Cuffed foil laminates for superior electrostatic and grounding shields in transformers.
copper coils
Flat Magnet & Specialty Wire

Precision flat magnet and specialty wire built for thermal and mechanical reliability.
Made in USA  ·  Intertek (ETL) Certified  ·  UL Recognized
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