What are the advantages of toroidal power transformers over traditional EI transformers?

Toroidal transformers offer higher electrical efficiency, lower stray magnetic field interference, reduced acoustic noise, and a compact physical footprint—up to 50% lighter and smaller than conventional EI laminate transformers.

Can Triad Magnetics engineer custom power transformers for specialized OEM applications?

Yes. Our US-based engineering design center in Perris, CA, specializes in custom primary/secondary voltage turns ratios, custom shielding, mounting styles, high-dielectric hipot insulation, and special temperature class requirements.

What international safety standards do Triad power transformers comply with?

Triad power transformers are designed and manufactured to meet global safety standards including UL 506, UL 60601-1 (medical), CSA C22.2, IEC/EN 61558, CE, RoHS, and REACH guidelines.

High-Reliability Power Transformers for Demanding OEM Applications

Power transformers serve as foundational electromagnetic components in modern electrical, medical, and industrial electronics systems. Operating primarily through inductive coupling, these passive magnetic devices efficiently transfer power between circuits while stepping up or stepping down voltage levels to meet critical application tolerances.

With over 75 years of continuous manufacturing experience, Triad Magnetics provides global procurement officers and system engineers with world-class power transformers. Backed by our state-of-the-art U.S. Design Center in Perris, California, and ISO 9001:2015 certified global production facilities, we deliver high performance, minimal electromagnetic interference (EMI), and maximum operational safety.

Standard Power Transformer Specifications

The table below highlights typical technical parameters available across our standard and modified catalog configurations. Custom winding, mounting, and dielectric configurations are available upon request.

Parameter	Standard Specification Range	Compliance / Class Ratings
Primary Voltage	115V, 230V, Dual Primary (115V/230V), 50/60Hz	UL, CSA, CE, VDE
Secondary Voltage	2.5V to 230V Center-Tapped (Series/Parallel configurations)	Low-voltage control / High isolation
Power Capacity	1.1 VA to 1,000+ VA Rating	Continuous duty design
Insulation Class	Class B (130°C), Class F (155°C), Class H (180°C) available	UL 94V-0 Flammability rated
Dielectric Strength	1,500 VAC up to 4,200 VAC High Potential (Hipot) test	Enhanced barrier isolation
Leakage Current	Ultra-low leakage options (< 50 µA for Medical models)	IEC 60601-1 Medical Equipment

Explore Our Power Transformer Product Families

Triad Magnetics offers one of the industry's broadest lines of off-the-shelf and custom-engineered power transformers built for international commercial and industrial markets.

Medical-Grade Isolation Power Transformers — Triad Magnetics

Medical Isolation Transformers

Specifically built for patient environment electrical safety in hospital beds, dental monitors, and laboratory diagnostics. Utilizes high-efficiency toroidal construction to drastically reduce physical footprint, stray fields, and leakage currents below 50 µA.

Toroidal Medical Power Transformers — Triad Magnetics

Toroidal Power Transformers

Compact, lightweight toroidal designs featuring dual secondary windings for series or parallel output configurations. Delivers superior energy efficiency, low thermal output (25°C to 55°C rise), and minimal acoustic vibration for audio and sensitive instruments.

PC Mount World Series™

Engineered for direct printed circuit board mounting. Features dual bobbin construction and protective shroud isolation between primary and secondary windings to withstand international safety agency testing standards without electrostatic shielding.

Flat Pack and Split Pack Power Transformers — Triad Magnetics

Flat Pack™ & Split Pack™

Low-profile PC mount transformers ideal for space-constrained solid-state power circuits, industrial automation controls, and instrumentation. Non-concentrically wound side-by-side bobbins minimize capacitive coupling and eliminate expensive shields.

Chassis Mount & Quick Pack™

Rugged, chassis-mountable transformers equipped with quick-connect terminals or flexible wire leads. Designed to simplify cabinet assembly in heavy machine controls, HVAC systems, power distribution units, and industrial equipment.

Class-2 Power Control & Autotransformers — Triad Magnetics

Class-2 & Autotransformers

UL Class 2 energy-limiting control transformers offering tamper-resistant insulation shrouds and integrated mounting brackets. Autotransformers provide economic voltage step-up/step-down conversion with superior voltage regulation.

Why Global OEM Procurement Teams Choose Triad Magnetics

Navigating international electrical safety codes, stringent thermal limits, and global supply chain volatility demands an expert manufacturing partner. Triad Magnetics combines engineering depth with robust manufacturing resilience.

ISO 9001:2015 Certified Quality

100% testing on critical parameters including Hipot dielectric strength, turns ratio, excitation current, and DC resistance.

Custom Design Capabilities

Our California-based design team can modify catalog standards or create bespoke magnetic designs tailored to your precise electrical requirements.

Dual-Shore Manufacturing

Facilities in both North America and the Philippines provide risk mitigation, competitive volume pricing, and reliable lead times.

Comprehensive Compliance

Products engineered to satisfy stringent global regulatory frameworks including UL, CSA, TUV, IEC, CE, RoHS, and REACH.

Frequently Asked Questions (FAQ)

What is the advantage of toroidal power transformers over traditional EI transformers? ▼

Toroidal power transformers feature a continuous ring-shaped core that eliminates air gaps. This offers up to 50% physical weight and space reduction, significantly reduced stray magnetic field emissions (making them ideal for medical and sensitive audio gear), lower acoustic hum, and higher energy efficiency.

Can Triad Magnetics design custom power transformers for specialized OEM requirements? ▼

Yes. Our engineering team at our Perris, CA R&D center specializes in fully custom magnetic solutions. We can tailor turns ratios, primary/secondary voltages, mechanical mounting shapes, shielding, thermal insulation classes, and lead terminations to meet exact specs.

How do Split Pack™ transformers reduce cost in PCB design? ▼

Split Pack™ power transformers feature non-concentrically wound side-by-side bobbins. This physical isolation reduces interwinding capacitance, eliminating the necessity for costly electrostatic shielding while achieving high potential dielectric insulation standards.

Request Detailed Technical Specifications & Catalogs

Are you specifying magnetic components for a new product design or seeking an established alternative supplier? Download our complete engineering product catalog or consult directly with our engineering staff.

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