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Twenty Six Years of Top Experience

Our main products include all kinds of Electronic components, high frequency transformers, low frequency transformers, chokes, toroidal inductors, chip inductors, switching power supplies, etc. Our engineers have rich experience in R&D, and our services will meet your design needs.

We provide a large number of efficient processing solutions for industrial customers. The precision and stability of our products are at the forefront of the industry.

They chose us

Who needs electronic transformers

Clients choose us for our combination of superior quality and competitive pricing. We've earned their trust by consistently delivering exceptional products at fair prices, and we remain committed to maintaining this trust through ongoing innovation and excellent service.

Quality is a Top Priority at LPEMA

We are dedicated to delivering products and services that not only meet but exceed the expectations of our customers. Our commitment to quality is evident in every aspect of our operations.

LATEST BLOGS

Your Partner LPEMA

Understanding Magnetic Saturation and the B-H Curve in Transformer Design

This article explains magnetic saturation and the B-H curve in transformer design. It covers saturation mechanisms, material behavior, DC bias effects, air gap influence, and practical design strategies to prevent saturation in high-frequency power electronics.

Dec 23, 2025

Advanced Cooling Techniques for High-Frequency Magnetic Components

This engineering guide explores advanced cooling techniques for high-frequency magnetic components. It details strategies for managing both core loss and winding loss, focusing on minimizing thermal resistance ($R_{th}$). Key techniques covered include optimizing conduction through mechanical heat sinks and PCB thermal vias, utilizing high-performance Thermal Interface Materials (TIMs) and conductive potting compounds, and implementing active cooling methods like forced air and liquid immersion for extreme power density. The framework provides actionable advice for matching the cooling strategy to the component's loss profile, ensuring reliability and maximizing component lifespan in compact power converters.

Dec 16, 2025

How to Select Magnetic Core Materials for High-Frequency Transformers

This article serves as a complete technical guide for selecting magnetic core materials for high-frequency transformers in modern power electronics. It offers a detailed engineering comparison of five major material types: Manganese-Zinc Ferrite, Iron Powder, Sendust (FeSiAl), Nanocrystalline, and Amorphous Cores. We analyze their critical performance metrics, including saturation flux density ($B_s$), core loss ($P_v$), permeability stability, and Curie temperature ($T_c$). The guide confirms that while advanced materials are suitable for inductors or low-frequency applications, MnZn ferrite remains the optimal choice for high-frequency isolation transformers operating above 100 kHz due to its lowest AC loss and best performance-to-cost ratio. A practical selection framework is provided to help engineers match core properties to specific power topologies (e.g., LLC, Flyback, PFC).

Dec 12, 2025

PoE Transformer Manufacturer: The Tier-1 OEM Source for Low-Cost PoE Transformer Alternatives

For Procurement Managers and Electronic Engineers, the challenge is always the same: how to maintain Tier-1 reliability while meeting aggressive BOM (Bill of Materials) cost targets? When specifying magnetic components, you often rely on big names like Wurth Elektronik to ensure quality. But are you paying for the component, or are you paying for the brand logo?

Dec 4, 2025

Frequently Asked Questions

Send an inquiry—Communicate requirements—Engage with a professional engineer—Research and design—Quotation—Sample—Pilot production—Mass production

  1. Provide samples for our disassembly analysis.
  2. Provide the product specification document.
  3. Provide electrical parameter requirements (such as current, voltage, power, frequency, inductance), product size specifications, circuit diagrams, transformer pinout diagrams, and special process requirements. [For specific information, please contact us.]

Yes, we are an innovative electronic component manufacturer integrating R&D design with production. We have the capability for independent research and development. Our R&D team consists of over 20 professionals, ensuring to address all customer needs from the design and development phase through to after-sales service.

During the sample phase, we provide detailed test reports for customer reference to ensure that all electrical parameters meet the customer's requirements. In the pilot production phase, we provide a detailed specification document for customer approval, and production will only commence after customer confirmation. During the mass production phase, we have a professional quality assurance team of over 30 members, covering all inspections from raw materials to finished products. At the same time, we are equipped with approximately 100 inspection machines, covering inspections from appearance to various parameter tests, to ensure the product's pass rate.
Yes, we can provide samples or prototypes, but the samples are subject to a charge. If a pilot production order is placed within one month of receiving the samples, we will credit the sample fee against the payment for the order. Typically, the sample design cycle is within one week.

It depends on the material's MOQ (Minimum Order Quantity). Generally, the MOQ is set between 3,000 to 5,000 pieces. However, before proceeding to mass production, we are happy to support small-scale pilot production runs, such as 500 to 1,000 pieces.

This depends on the production schedule of our manufacturing department. Generally, the first pilot production or batch production will take about 3 to 4 weeks to complete; subsequent mass production orders can be completed within 2 to 3 weeks.

Our Mission

Our commitment to innovation and industry best practices enables us to drive efficiency, foster growth, and contribute to our clients’ long-term success.

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