PRODUCTS > HIGH-FREQUENCY TRANSFORMERS

Custom High-Frequency Transformers, Built for Your Topology

Pacific Transformer designs and builds custom high-frequency transformers for switch-mode and resonant power conversion — ferrite, nanocrystalline, and powdered-iron cores wound from 1 kHz to 1 MHz, from a few watts to several kilowatts.

Free engineering designs. Quotes in 24 hours. Prototypes in 48. Catalog pricing on custom work.

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Custom high-frequency transformers for power conversion

Wound to Spec

High-Frequency Transformers, Wound to Spec

Raising switching frequency is how modern power electronics get smaller — but it also moves the design problem into the winding. Skin effect, proximity loss, leakage inductance, and core material selection start to dominate above a few tens of kilohertz, and a transformer that works on paper can still run hot on the bench.

We wind high-frequency transformers on ferrite, nanocrystalline, and powdered-iron cores for operating frequencies from 1 kHz to 1 MHz and power levels up to several kilowatts, with custom primary/secondary ratios and isolation built to your spec. Send us the topology, frequency, and rails — our engineers spec core, wire construction, and interleaving for free, and every unit is individually tested before it ships.

Send us your specs

Typical Specifications PTC-HF

Configuration Single- & multi-winding

Voltage Range Custom primary/secondary + isolation to spec

Core Material Ferrite, nanocrystalline & powdered iron

Power Range A few W up to several kW

Frequency 1 kHz to 1 MHz

Order Quantity No minimums, no maximums

1MHz

Max Operating Frequency

5kW

Power Handling

4kV

Isolation Rating

0MOQ

No Minimums, No Maximums

Applications

Where High-Frequency Transformers Are Used

Wherever power density is the constraint — switch-mode supplies, resonant converters, inverters, and industrial power trains.

Switch-Mode Power Supplies

Forward, push-pull, half- and full-bridge designs where size and efficiency both matter.

Resonant / LLC Converters

Tightly controlled leakage and magnetizing inductance for soft-switching topologies.

Renewables & Inverters

Isolated DC-DC stages in solar, storage, and grid-tie inverter power trains.

Industrial Power Conversion

Drives, welders, plating supplies, and process equipment running at high frequency.

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01 Current Transformers (CTs) Current transformers (CTs) for accurate metering, protection, and monitoring. 02 Flyback Transformers High-frequency designs for switch-mode supplies, EV charging, and industrial electronics. 03 Isolation Transformers Galvanically isolated, electrostatically shielded designs for clean, safe power. 04 PDU Transformers Power distribution unit transformers for data centers and critical power. 05 Pulse Transformers Fast-edge pulse transformers for signal coupling, gate drive, and timing. 06 Step-Down Transformers Voltage conversion for machinery, imported equipment, and OEM gear. 07 Step-Up Transformers Boost lower input voltages to the higher levels your equipment requires. 08 Three-Phase Transformers Three-phase transformers for industrial power, distribution, and high-load applications. 09 Toroidal Transformers Low-noise, high-efficiency cores for audio, medical, and instrumentation. 10 Voltage / Potential Transformers (VTs/PTs) Voltage (potential) transformers for safe, accurate high-voltage measurement. 11 Guitar Amp TransformersCatalog Parts Available Output, power, and choke transformers for guitar amps — stock or custom. 12 Distribution TransformersCatalog Parts Available Single and three-phase distribution units up to 750 kVA. 13 Padmount TransformersCatalog Parts Available Pad-mounted transformers for commercial and utility sites.

Industries Served

From NASA payloads to guitar amplifiers, Pacific Transformer's custom magnetics power some of the most demanding applications in the world. Our engineering team has deep experience across industries where compliance, performance, and reliability aren't optional — they're required.

Aerospace

Defense

Medical & Dental

Automotive & EV

Audio

Conveyance Systems

Industrial & Commercial

Power Quality & Measurement

Alternative Energy

Data Center

Utilities

FREQUENTLY ASKED QUESTIONS

High-Frequency Transformers

High-frequency transformers operate well above line frequency — typically from a few kilohertz into the megahertz range. The higher frequency lets the core be dramatically smaller for the same power, but it also means winding losses, leakage inductance, and core material selection drive the design rather than simple turns count.

It depends on frequency, flux density, and loss budget. Ferrite covers most switch-mode designs, nanocrystalline gives high permeability and low loss where size or common-mode performance is critical, and powdered iron suits designs that need distributed gap and DC bias tolerance. We recommend the material as part of the free design.

Yes. For LLC and other resonant topologies we can either minimize leakage through interleaved windings or deliberately build it to a target value so it serves as the resonant inductor. Give us the number you need and the tolerance you can live with.

No — no minimums and no maximums. We build from a single prototype through full production runs, with free engineering and a working prototype typically in 48 hours.

Send Us Your Specs

Specs in — a quote back in 24 hours.

Tell us what you're building. A Pacific Transformer applications engineer reviews every request and responds with pricing and lead time — no forms routed to a sales queue.

24HR

Quote turnaround

Pricing and lead time within 24 hours

48HR

Prototype turnaround

A wound, tested prototype in 48 hours

Prefer to talk it through? 800-325-0501

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