Xi'an, Shaanxi, China · OEM / ODM Transformer & Power Supply Manufacturer [email protected]  |  ✔ Intertek-Verified Supplier

High Frequency Transformer

Precision-engineered ferrite core solutions designed for SMPS, flyback converters, resonant topologies, and industrial power electronics. Manufactured by Shaanxi Zelqo Power Co., Ltd. with Intertek on-site verification.

Manufacturing & Testing Flow

Certified Workmanship & Testing Standards

Every high frequency transformer unit passes rigorous winding, insulation, aging, and dielectric testing.

Winding Station
Winding
Cutting Station
Cutting
Core Insulation
Core Insulation
Primary Winding
Primary Winding
Wiring Process
Wiring Process
Testing Station
In-Process Testing
Semi-finished Products Test
Semi-finished Test
Aging Test Station
Aging Test
Packing Station
Packing
Export Packing
Export Packing
Tooling Fixture
Tooling Fixture
Cutting Instrument
Cutting Instrument
CNC Winding Machine
CNC Winding
Circular Winding Machine
Circular Winding
Wrapping Machine
Wrapping Machine
Automated Winding Machine
Automated Winding
Pipe Cutter
Pipe Cutter
Crimping Machine
Crimping Machine
Finished Goods Inspection
Finished Inspection
Digital Power Meter
Digital Power Meter
AC Power Source
AC Power Source
LCR Digital Bridge Tester
LCR Digital Bridge
DC Low Resistance Tester
DC Resistance Tester
Impulse Winding Tester
Impulse Tester
Hi-pot Tester
Hi-pot Tester

Custom Transformer Solutions

Showing engineered designs built for OEM/ODM switch-mode applications
100% Pre-Shipment Tested
220v to 24v Transformer ER29 ER35 ER40 High Frequency Transformer
LVD LVD FCC FCC

220V to 24V ER29 / ER35 / ER40 High Frequency Power Transformer

$0.42 - $1.50 / piece
MOQ: 5 pieces Topology: SMPS / Flyback Application: Power Supply Units
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EE30 Flyback High Frequency Transformer Ferrite Core
LVD LVD FCC FCC

EE30 Flyback High Frequency Ferrite Core Transformer

$0.42 - $0.60 / piece
MOQ: 5 pieces Core Type: MnZn Ferrite EE30 Design: Gapped Core / Low Loss
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EE EI EEI EEL EP ER EF EFD ETD Electrical High Frequency Transformer
LVD LVD FCC FCC

EE / EI / EEI / EEL / EP / ER / EF / EFD Series HF Transformer

$0.15 - $5.00 / piece
MOQ: 5 pieces Core Range: Complete Metric Geometries Mounting: Horizontal / Vertical PCB
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Custom 5v 12v 24V 2a Switch Power Transformer EE10 EE13 EE16 EE17 EE25
LVD LVD FCC FCC

Custom 5V / 12V / 24V 2A SMPS Transformer (EE10 to EE25)

$0.15 - $5.00 / piece
MOQ: 500 pieces Output Current: Up to 2A DC Regulated Winding: Triple Insulated Wire
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PQ Type Ferrite HF Transformer 200kHz 1kW LLC Resonant Converters
LVD LVD FCC FCC

PQ Type Ferrite HF Transformer | 200kHz, 1kW for LLC Converters

$1.50 - $5.00 / piece
MOQ: 5 pieces Operating Freq: 200 kHz Optimized Efficiency: Low Core Loss High Density
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High Voltage High Frequency DC Transformers
LVD LVD FCC FCC

High Voltage High Frequency Step-Up Transformer for Industrial DC

$0.50 - $5.00 / piece
MOQ: 50 pieces Dielectric Rating: Reinforced Isolation Application: DC Lighting & High Voltage
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EE Series EE55 220v 12v Transformer 500w PCB Transformer
LVD LVD FCC FCC

EE55 220V to 12V 500W High Power PCB Potential Transformer

$0.15 - $5.00 / piece
MOQ: 5 pieces Rated Power: 500 Watts Pinout: Custom Multi-Pin PCB Through-Hole
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High Frequency Transformer 48V 24V 12V LED Transformers
Main Product LVD LVD

48V / 24V / 12V ETD & EFD Power Magnetics for LED Drivers

$1.50 - $5.00 / piece
MOQ: 5 pieces Market Status: Verified Production Line Thermal Margin: Class B / F (130℃–155℃)
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High Frequency Transformador EE13 EEL16 EE19 EE33 EE42 EE55
LVD LVD FCC FCC

EE13 / EEL16 / EE19 / EE33 / EE42 HF Converter Magnetics

$0.15 - $5.00 / piece
MOQ: 5 pieces Form Factor: Compact Low-Profile Safety: Creepage & Clearance Compliant
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Ferrite Core PQ26 PQ2620 PQ2625 Flyback SMPS Chopper Transformer
LVD LVD FCC FCC

PQ2620 / PQ2625 Ferrite Core SMPS Chopper Transformer

$0.80 - $5.00 / piece
MOQ: 5 pieces Shielding: Self-Shielding Round Leg Core Design: Custom Inductance Gap
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Step Down Electronic Isolation Transformer High Frequency
LVD LVD FCC FCC

Step-Down 5V to 24V Electronic HF Galvanic Isolation Transformer

$0.80 - $3.50 / piece
MOQ: 5 pieces Secondary: 5V / 6V / 9V / 12V / 15V / 24V Hi-pot: 3.0kVAC Primary to Secondary
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High Frequency Transformer EFD25 Transformer 220v to 24v
LVD LVD FCC FCC

EFD25 Low-Profile Horizontal SMPS Step-Down Transformer

$1.50 - $5.00 / piece
MOQ: 5 pieces Form Factor: Ultra Slim Flat Profile Application: Telecom & Slim Power Adapters
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Quality & Compliance Assurance

Built to Meet International Safety Standards

Shaanxi Zelqo Power Co., Ltd. implements full traceable quality control protocols from magnetic core procurement to final hi-pot dielectric validation.

Dielectric Strength & Safety

All high frequency designs undergo strict 100% impulse winding and hi-pot dielectric withstand tests (up to 4.0kV AC). Engineered in compliance with IEC 61558, IEC 62368-1, and UL 1446 insulation system standards.

Precision CNC & Magnetic Balance

Automated CNC winding ensures exact turns ratio, controlled leakage inductance, and minimum inter-winding capacitance. Each batch is inspected via multi-frequency LCR bridge testers to guarantee resonant stability.

Custom OEM/ODM Engineering

Our Xi'an engineering team provides custom bobbin pinouts, flyback gapping, planar alternatives, vacuum varnish impregnation, and customized packaging solutions matching specific buyer BOM requirements.

Ready to Customize Your High Frequency Magnetics?

Send your electrical specifications (input/output voltages, switching frequency, topology, power ratings) to receive engineering review feedback and sample quotes within 24 hours.

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