High Current Flat Wire Inductors

ProMagTech manufactures custom flat wire inductors, planar transformers, PFC inductors and EMI filter magnetics for EV chargers, energy storage PCS, solar inverters and industrial power converters.

15+
Years Experience
200+
Products
300A
Max Current Delivered

Featured Technical Resources

Engineering pages for buyers comparing flat wire inductors, PFC inductors, integrated magnetics and high-current sample-stage design cases.

Evidence-backed buyer resources

Public evidence for engineers and sourcing teams reviewing ProMagTech's manufacturing process, sample-stage design work and inspection scope.

Core Advantages

Why industry leaders choose ProMagTech

Low DCR Flat Wire Design

Flat copper wire winding is reviewed against DCR, AC loss, thermal path and DC bias requirements. Final loss and temperature rise must be confirmed by sample test data.

🔬

Precision R&D

Engineering review starts from converter topology, current waveform, insulation requirements, thermal path and mechanical envelope. Custom design support is documented through project-specific drawings, samples and test records.

🏭

Process and test evidence

Public evidence now includes factory process photos, production equipment photos, finished-product inspection images, product files and redacted inspection records.

🌏

Global Service Network

Project communication supports overseas buyers in Southeast Asia and other export markets. Published evidence now focuses on process records, inspection scope, product files and engineering review materials.

💠

Rapid Customization

Custom design review starts from inductance, current waveform, frequency, cooling method and mechanical envelope. Sample timing is confirmed after engineering review.

🛡

Project-specific inspection review

Inspection scope can cover inductance, DCR, DC bias, leakage inductance, turns ratio, hi-pot and insulation resistance according to the approved sample record.

Contact Us

Contact Person

Zhang Yong

Phone / WhatsApp

+86 13537658938

Email

zyong@promagtech.cn

Address

No. 22 Dongkeng Road, Fenghuang Street, Guangming District, Shenzhen, China

Website

www.promagtech.com

WhatsApp ✉️ Send Email

Scan WeChat QR Code

WeChat QR

ProMagTech

Scan QR code to add friend
Get product info & quotes

📍 Shenzhen, China

Send Inquiry

Service Commitment

Fast Response

Technical team provides initial proposal within 1 business day

Free Evaluation

Free sample evaluation service available

Technical Confidentiality

Strict confidentiality for customer technical data

Products

Full range of high-performance power magnetic components for various power levels and applications

High Current Flat Wire Inductor

High Current Flat Wire Inductor

Featuring flat copper wire winding for ultra-low DCR and excellent thermal performance. Designed for EV, energy storage and other high-current applications.

Three-Phase Common Mode Inductor

Three-Phase Common Mode Inductor

Nanocrystalline core designed for three-phase power systems. Excellent common mode impedance for PV inverters and energy storage converters.

Planar Flat Wire Transformer

Planar Flat Wire Transformer

Flat wire winding with nanocrystalline core for ultra-high power density. Suitable for LLC, CLLC resonant topologies up to 200kHz.

SQ Common Mode Inductor

SQ Common Mode Inductor

Designed for EV motor drive and inverter EMC filtering. for automotive applications.

Charging Station PFC Inductor

Charging Station PFC Inductor

Designed for EV DC charging station PFC circuits with flat wire winding supporting high power output.

High-Frequency Amorphous CM Inductor

High-Frequency Amorphous CM Inductor

Amorphous core with PCB-mounted winding structure, ultra-thin design for SiC/GaN high-frequency applications.

PFC Boost Flat Wire Inductor

PFC Boost Flat Wire Inductor

Designed for single-phase/three-phase PFC circuits with low DCR and low temperature rise.

Energy Storage Inductor

Energy Storage Inductor

Designed for energy storage converters and bidirectional DC-DC modules. available.

SMD Flat Wire Inductor

SMD Flat Wire Inductor

Ultra-thin SMD flat wire inductor for consumer electronics and compact industrial power modules.

For more product details: www.promagtech.com/products

Technical Resources

Deep dive into magnetic component design principles, selection guides, and application cases

Flat Wire vs Round Wire
Selection Guide

Flat Wire vs Round Wire Inductors: How to Choose?

Comprehensive comparison of two winding technologies from DC resistance, saturation current, thermal performance, and cost.

Download PDF
PFC Inductor Selection
Design Calculation

20-60kW PFC Inductor Selection & Design Guide

Detailed explanation of inductor selection steps, calculation formulas, and design considerations for three-phase PFC circuits.

Download PDF
Common Mode Inductor
EMI Design

Common Mode Inductor Design Guide: Improving EMI

Systematic explanation of common mode choke optimization methods from core material selection to winding structure and grounding.

Download PDF
800V Platform
Selection Guide

800V Platform Inductor Selection: EV High Voltage Solutions

Key points on insulation distance, partial discharge, and thermal management design for 800V architecture requirements.

Download PDF
Southeast Asia Charger
Reliability Analysis

Southeast Asia EV Charger Reliability Design

Analysis of magnetic component reliability design strategies for harsh environments including high temperature, humidity, and salt spray.

Download PDF
Solar Storage
Whitepaper

Solar Energy Storage Magnetic Components Whitepaper

Comprehensive analysis of magnetic component technical requirements and selection recommendations for energy storage PCS and PV inverters.

Download PDF
Outdoor ESS PCS Magnetics
Outdoor ESS Magnetics

Outdoor Energy Storage PCS Magnetics Design Guide

Review transformer and PFC module design points for outdoor energy storage PCS systems.

Download PDF
400kHz LLC transformer frequency knee
LLC Transformer Design

High Frequency vs High Density: 400kHz LLC Transformer Frequency Knee

Review the 3kW / 800V LLC transformer frequency-knee trade-off between 400kHz and 1MHz.

Download PDF
48V to 12V DCX transformer for AIDC power architecture
AIDC Power Magnetics

IBC DCX Transformer Loss Analysis for AI Server Power

Review magnetic-loss dominated design in the 48V to 12V intermediate-bus DCX transformer stage.

Download PDF
OBC PFC inductor selection and design guide
OBC PFC Magnetics

OBC PFC Inductor Selection and Design Guide

Compare 11kW totem-pole and 22kW Vienna PFC inductor design boundaries for 800V-platform OBC systems.

Download PDF
48V AI server PSU flat transformer guide
AI Server PSU Magnetics

48V AI Server PSU Flat Transformer Design Guide

Review EQ flat core design, copper busbar output, thermal path and automated assembly boundaries for 48V AI server PSU flat transformers.

Download PDF
AIDC magnetic components full power-chain applications
AIDC Power Architecture

AIDC Magnetic Components Full Power-Chain Applications

Map magnetic component positions from 10kV grid input to 800V and 48V conversion stages and CPU/GPU core VRM rails.

Download PDF
Energy Storage PCS magnetic components white paper
Energy Storage PCS Magnetics

Energy Storage PCS Magnetic Components White Paper

Review high-efficiency, high-reliability, low-loss and customized magnetic component design points for PCS systems.

Download PDF

About ProMagTech

SHENZHEN PROMAGTECH CO.,LTD was founded in 2013, specializing in R&D, manufacturing, and sales of power magnetic components. Located in Guangming District, Shenzhen, we have modern production facilities and comprehensive quality testing systems.

Our main products include flat wire inductors, planar transformers, common mode chokes, PFC boost inductors, energy storage inductors, and high-frequency amorphous reactors. Our core products feature flat copper wire winding technology and nanocrystalline core materials, offering low DCR, high saturation current density, excellent thermal performance, and high reliability.

Products are widely used in EV OBC (On-Board Chargers), DC-DC converters, EV DC charging stations (20kW-60kW), solar inverters, energy storage converters (PCS), industrial power supplies, and 5G communication power supplies. Product evidence, material declarations, and reliability test scope should be confirmed for each project before qualification.

Contact Us
2013
Company founded, focused on magnetic component manufacturing
2015
Flat wire inductor technology breakthrough, first export to Southeast Asia
2018
Started supporting EV charging and industrial power magnetic component projects
2021
R&D and sample review process expanded
2026
Published process capability, inspection scope and downloadable engineering evidence for buyer review

News & Updates

Company news, industry insights, and technical sharing

ProMagTech New Ultra-Thin Planar Transformer Enters Mass Production
2026-03-10

ProMagTech New Ultra-Thin Planar Transformer Enters Mass Production

ProMagTech New Ultra-Thin Planar Transformer Enters Mass Pro...

Exhibiting at electronica China 2026, Booth E3-220
2026-02-18

Exhibiting at electronica China 2026, Booth E3-220

Exhibiting at electronica China 2026, Booth E3-220

Quality Process and Inspection Scope Update
2026-01-25

Quality Process and Inspection Scope Update

Quality Process and Inspection Scope Update

Technical Sharing: Flat Wire Inductors in Automotive OBC
2025-12-08

Technical Sharing: Flat Wire Inductors in Automotive OBC

Technical Sharing: Flat Wire Inductors in Automotive OBC

ProMagTech Successful Exhibition at Shenzhen International Electronics Fair
2025-09-15

ProMagTech Successful Exhibition at Shenzhen International Electronics Fair

ProMagTech Successful Exhibition at Shenzhen International E...

ProMagTech Launches New Automotive-Grade Flat Wire Inductor
2025-06-05

ProMagTech Launches New Automotive-Grade Flat Wire Inductor

ProMagTech Launches New Automotive-Grade Flat Wire Inductor

Industry Solutions

Covering EV, energy storage, solar, medical devices and more, providing one-stop magnetic component solutions

Solar Inverter Solutions
Solar Power

Solar Inverter Solutions

New Energy Vehicle Solutions
New Energy Vehicle

New Energy Vehicle Solutions

Industrial Automation Solutions
Industrial Automation

Industrial Automation Solutions

Medical Equipment Power Solutions
Medical Equipment

Medical Equipment Power Solutions

Rail Transit Power Solutions
Rail Transit

Rail Transit Power Solutions

Communication Power Solutions
Communication Power

Communication Power Solutions