__

Medical Isolation Transformers for Patient Safety

Bridgeport Magnetics delivers medical isolation transformers engineered for patient safety and regulatory compliance. Our solutions include the ISO-PUCK series, OEM medical-grade transformers, and fully custom medical isolation transformers designed for ultra-low leakage current. All models meet UL 60601-1 and IEC 60601-1 standards.

01 · Overview

Medical Isolation Transformers Engineered for Patient Safety

At Bridgeport Magnetics Group, we have been engineering medical isolation transformers since 1982, with a focus on protecting patients from dangerous leakage current in critical healthcare environments. Our transformers are used in patient monitoring systems, surgical equipment, diagnostic devices, cardiac care, and other applications where electrical safety is essential.

We offer three main solutions: the compact ISO-PUCK series, OEM medical-grade isolation transformers for device manufacturers, and fully custom medical isolation transformers built to your exact specifications. Every unit is individually tested for leakage current performance and certified to UL 60601-1, IEC 60601-1, and CSA standards. Whether you need a standard configuration or a highly customized solution, our toroidal designs with electrostatic shielding deliver reliable galvanic isolation and long-term performance.

Ready to buy? Meet the ISO-PUCK.

The ISO-PUCK is Bridgeport's UL 60601-1 toroidal medical isolation transformer — browse models, low-leakage specs, and request a quote.

Explore the ISO-PUCKRequest a Quote
02 · Product Solutions

Medical Transformer Solutions

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

ISO-Puck Medical Grade Isolation Transformers

Medical-grade isolation transformers in a compact puck format that dramatically reduce leakage current to protect sensitive equipment and ensure patient safety.

Learn more →
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

OEM Medical Grade Isolation Transformers

UL 60601-1 isolation transformers engineered for medical OEMs — low leakage current and high dielectric strength for patient-connected equipment.

Learn more →
Custom toroidal transformer by Bridgeport Magnetics – high efficiency, low noise, and compact design for medical, industrial, datacenter, and audio applications

Custom Medical Transformer Design

Custom toroidal isolation transformers engineered to your exact ratio, accuracy class, leakage limits, and form factor for medical OEM applications.

Learn more →
03 · Quality & Compliance

Certifications & Compliance

Medical isolation transformers must meet strict safety and performance standards to be used in healthcare environments. Certifications such as UL 60601-1 and IEC 60601-1 are not optional — they are required for regulatory compliance and patient safety. Bridgeport Magnetics maintains the following certifications for its medical-grade isolation transformers.

UL 60601-1
(Medical Electrical Equipment)

UL 60601-1 is the U.S. standard for the safety of medical electrical equipment and is harmonized with the international IEC 60601-1 standard. It sets requirements for insulation, creepage and clearance distances, dielectric strength, and leakage current limits. Bridgeport’s medical isolation transformers are designed and tested to meet UL 60601-1 requirements. Every unit undergoes hipot (dielectric strength) testing and leakage current measurement before shipment to ensure compliance and consistent performance.

Leakage Current Testing and Specifications

Leakage current testing is one of the most critical safety validations for medical isolation transformers under UL 60601-1 and IEC 60601-1. Bridgeport Magnetics designs its transformers to achieve leakage current values well below the maximum limits. A typical Bridgeport medical isolation transformer produces touch current significantly under 100 microamps, providing a strong safety margin for patient-connected medical equipment.

IEC 60601-1 International Standards

IEC 60601-1 is the internationally recognized base standard for the safety of medical electrical equipment. It serves as the foundation for UL 60601-1 (U.S.) and CSA C22.2 No. 60601-1 (Canada). Medical devices intended for global markets, including Europe (CE marking), Asia-Pacific, and other regions, must comply with this standard. Bridgeport designs its medical isolation transformers to IEC 60601-1, helping OEM customers achieve regulatory compliance across multiple international markets.

CSA Certification

CSA C22.2 No. 60601-1 is the Canadian equivalent of UL 60601-1 and is required for medical devices sold in Canada. Bridgeport’s medical isolation transformers carry CSA certification, allowing OEMs to use the same transformer in both U.S. and Canadian markets without needing separate components.

04 · Applications

Medical Transformer Applications

Custom medical isolation transformer for diagnostic imaging equipment including MRI, CT, and X-ray systems

Diagnostic Imaging Equipment (MRI, CT, X-Ray)

MRI, CT, and X-ray systems are highly sensitive to power quality. Even minor electrical noise or transients can create image artifacts and reduce diagnostic accuracy. These systems require stable, isolated power with very low leakage current.

Bridgeport Magnetics designs custom medical isolation transformers for diagnostic imaging equipment, using toroidal cores and electrostatic shielding to minimize noise and leakage current. The result is cleaner power delivery that helps OEMs achieve higher image quality and reliable performance in MRI, CT, and X-ray systems.

ISO-PUCK medical grade isolation transformer for patient monitoring systems including ECG monitors, bedside monitors, pulse oximeters, and infusion pumps. Medical isolation transformer for patient monitoring systems in ICU and cardiac care environments

Patient Monitoring Systems

Bedside monitors, telemetry systems, and central monitoring stations connect directly to patients and often fall under strict Type BF or Type CF classifications. These applications demand medical isolation transformers with ultra-low leakage current to protect patients in ICU and cardiac care environments.

Bridgeport Magnetics manufactures custom medical isolation transformers for patient monitoring systems in the 30 VA to 500 VA range. Our designs help OEMs meet IEC 60601-1 leakage current limits while ensuring maximum patient safety and continuous, reliable operation.

ISO-PUCK low leakage current isolation transformer for operating rooms with surgical lights, anesthesia machines, and procedure tables. Medical isolation transformer for laboratory and research equipment including analyzers and analytical instruments

Operating Room & Surgical Equipment

Operating rooms require multiple pieces of equipment to operate simultaneously with direct patient contact. Isolation transformers used in surgical environments must meet the strictest leakage current limits while providing uninterrupted power to surgical tables, anesthesia machines, electrosurgical units, and patient monitoring systems.

Bridgeport Magnetics specializes in custom medical isolation transformers for operating room and surgical equipment. Our solutions are engineered for low leakage current and high reliability, supporting OEMs developing equipment for operating rooms and surgical suites.

ISO-PUCK medical isolation transformer powering diagnostic equipment such as analyzers, centrifuges, incubators, and laboratory instruments. Custom medical isolation transformer for operating room and surgical equipment including anesthesia machines and surgical tables.

Laboratory and Research Equipment

Clinical laboratories, research facilities, and pharmaceutical environments use sensitive analytical instruments that are vulnerable to power disturbances. Equipment such as mass spectrometers, chromatography systems, automated analyzers, and incubators require clean, isolated power to maintain measurement accuracy and data integrity.

Bridgeport Magnetics designs custom medical isolation transformers for laboratory and research equipment ranging from 100 VA to 5 kVA. Our toroidal transformers with electrostatic shielding deliver the clean power and low EMI performance required to protect sensitive instruments from electrical noise and transients.

05 · Why Isolation

Why Medical Applications Require Isolation Transformers

Medical isolation transformers play a critical role in protecting patients and ensuring the reliable operation of medical equipment. In healthcare environments, even small amounts of leakage current or electrical noise can pose serious risks to patients and compromise the performance of sensitive devices. Understanding the specific requirements of your application helps in selecting the right transformer. Bridgeport Magnetics works directly with engineers and facility managers to recommend the most suitable medical isolation transformer — whether it’s a standard ISO-PUCK model, an OEM solution, or a fully custom medical isolation transformer designed for your exact needs.

Patient Safety and Leakage Current Limits

Patient safety is the primary reason healthcare facilities require medical isolation transformers. In hospitals and clinical environments, patients are often connected to multiple pieces of electrical equipment simultaneously. Any leakage current from these devices can create a risk of electric shock, especially in critical care areas where patients may have direct conductive contact with medical instruments.

A medical-grade isolation transformer provides galvanic isolation between the mains power supply and the equipment’s internal circuits. Because the primary and secondary windings are electrically separated and connected only through magnetic coupling, the transformer significantly limits the amount of leakage current that can reach ground or pass through a patient or staff member.

Bridgeport Magnetics designs its medical isolation transformers to achieve leakage current values well below the limits set by UL 60601-1 and IEC 60601-1. This additional safety margin helps compensate for component aging, varying environmental conditions, and the cumulative leakage current from multiple devices operating in the same patient-care area.

Modern medical equipment contains sensitive electronic circuits that can be easily disrupted by power line disturbances such as voltage spikes, transients, and high-frequency noise. These disturbances can interfere with analog-to-digital converters, signal amplifiers, and microprocessor-based systems, leading to inaccurate readings or equipment malfunction.

A Bridgeport medical-grade isolation transformer provides strong protection by creating galvanic isolation between the primary and secondary windings. Every Bridgeport medical transformer includes an electrostatic shield as a standard feature, which significantly reduces high-frequency noise and EMI. Combined with toroidal core construction, these transformers deliver exceptionally clean and stable power with low electromagnetic emissions.

This level of noise suppression is especially important for patient monitors, infusion pumps, diagnostic imaging systems, and other electronic equipment used in operating rooms and patient care areas. Cleaner power helps reduce false alarms, improves data accuracy, and extends the lifespan of sensitive medical devices.

In diagnostic imaging and precision measurement applications, power quality directly affects the accuracy of results. Equipment such as MRI scanners, CT systems, and EEG machines must detect extremely weak signals, making them highly susceptible to electrical noise introduced through the power supply.

Bridgeport Magnetics designs custom medical isolation transformers specifically for these demanding applications. Our toroidal transformers combine galvanic isolation with electrostatic (copper) shielding and low-induction core designs to deliver exceptionally clean, stable power.

Compared to traditional laminated transformers, toroidal construction creates a continuous magnetic path that dramatically reduces stray magnetic fields and electromagnetic interference (EMI). It also minimizes audible noise, helping maintain a quiet clinical environment. The result is clearer diagnostic images, fewer artifacts, and more reliable performance in critical imaging and monitoring systems.

06 · OEM Partnerships

Custom Medical OEM Partnerships

Bridgeport Magnetics has partnered with medical device OEMs since our founding in 1982. For OEM customers who need a medical transformer designed into a new product, Bridgeport offers a structured design-to-production process.

Design-to-Specification Process

Every custom medical OEM project starts with a review of your electrical and mechanical requirements. You provide specifications such as voltage, VA rating, dimensions, mounting, and certifications. Our engineering team delivers a preliminary design proposal, typically within five business days. For complex projects, we schedule a design review call to finalize specifications.

Prototype Development

Once approved, Bridgeport builds prototypes in our Shelton, CT facility using production-grade materials and processes. Typical lead time is two to four weeks. Each prototype includes a full test report covering hipot, leakage current, voltage regulation, and temperature rise to support your certification process.

Volume Production Capabilities

Bridgeport’s Shelton, CT facility supports both small-batch and high-volume production. All medical transformers are built with traceable materials and individually tested before shipment. OEMs can source both medical and non-medical transformers from a single supplier, simplifying procurement and supply chain management.

Engineered for Care

Built for patient safety. Trusted in critical care.

UL 60601-1 medical-grade isolation transformers engineered, tested, and manufactured in Shelton, Connecticut – protecting patients and sensitive equipment since 1982.

Talk to an engineer →
07 · FAQ

Frequently Asked Questions

What is a medical isolation transformer?

A medical isolation transformer is a specialized transformer designed to provide galvanic isolation between the power source and medical equipment. It helps limit leakage current to protect patients and ensure compliance with medical safety standards such as UL 60601-1 and IEC 60601-1.

Standard isolation transformers are designed for general industrial use and often have higher leakage current. A medical isolation transformer is specifically engineered with electrostatic shielding and tighter construction to achieve much lower leakage current and meet the strict requirements of UL 60601-1 and IEC 60601-1 for patient-connected equipment.

Medical isolation transformers are required to protect patients from leakage current when multiple electrical devices are connected to them. They provide galvanic isolation that significantly reduces the risk of electric shock in hospitals, operating rooms, and other patient-care environments.

What leakage current do Bridgeport medical isolation transformers achieve?

Bridgeport medical isolation transformers are designed to produce leakage current well below the limits set by UL 60601-1 and IEC 60601-1. Most units achieve touch current significantly under 100 microamps, providing a strong safety margin for patient-connected equipment. Our OEM transformers can do <10 microamps.

Bridgeport’s medical isolation transformers are certified to UL 60601-1, IEC 60601-1, and CSA C22.2 No. 60601-1. Every unit is individually tested for hipot and leakage current before shipment.

Can Bridgeport build custom medical isolation transformers?

Yes. Bridgeport specializes in custom medical isolation transformers. We can modify voltage, VA rating, lead configuration, mounting, enclosure, and shielding to meet your exact OEM or application requirements.

Prototype lead time is typically 2 to 4 weeks from design approval. Volume production lead times vary depending on quantity and complexity.

Bridgeport medical isolation transformers are used in diagnostic imaging (MRI, CT, X-ray), patient monitoring systems, operating room equipment, surgical devices, laboratory instruments, and other medical and research applications that require low leakage current and clean isolated power.

Do medical isolation transformers help reduce electrical noise?

Yes. Bridgeport medical isolation transformers use toroidal cores and electrostatic shielding to significantly reduce common-mode noise, EMI, and high-frequency transients, helping improve the performance of sensitive medical and diagnostic equipment.

The right transformer depends on your required VA rating, voltage, leakage current limits, physical size constraints, and certifications needed. Bridgeport’s engineering team can review your specifications and recommend the best solution, whether it’s a standard model or a fully custom design.

Yes. Bridgeport works with many medical device OEMs. We offer both standard and custom medical isolation transformers designed specifically for integration into OEM equipment, with full test documentation to support regulatory submissions.

Shopping Cart

Product Inquiry Form