EFD40 EFD Series High-Frequency Transformer Customized Manufacture DW3945

Shenzhen Dowis Electronics Co., Ltd. is a professional manufacturer of electronic transformers, inductors, and filters integrating R&D, production, and sales. It is a national high-tech enterprise and has passed the IATF16949:2016 automotive industry quality management system certification, the product has passed the "UL""CQC" and other safety certifications. The products are widely used in communication equipment, new energy vehicles, industrial control equipment, high-power LED drives, and other market areas. The industry has high visibility. In addition to the domestic market, but also exported to many countries in Europe and the United States.

In order to further expand production capacity, it has set up a special test area construction area in Zhaoqing YueGui cooperation in 2018 of 14000 square meters of manufacturing center named ZhaoQing Sheng Xiang electronic technology co., Ltd. Its management technical team has rich experience in cooperating with customers from well-known domestic enterprises and overseas. The design of products can fully follow customer’s needs and services with a good quality control system, and it has been recognized by many famous enterprises as the core suppliers. We look forward to cooperating with you.

1. Drawing

2. Environmental Conditions

• Storage Temperature: -20--70˚C；
• Enviornmental Temperature: -40--70˚C;
• Operating Temperature: 110˚C MAX;
• Relative Humidity: 10%-95%;
• Long Term Durability Test.
  

3. Electrical Specification

• Inductance Value:L_N1=650―700µH(at:1KHz,0.3V)；
• Q Value:N1>230(at:100KHz,0.3V)；
• Leakage Inductance:LL_N1=60-75µH(at:1KHz,0.3V,Other Winding Short Circuit)；
• Dielectric Strength:N1,N2————N3,N4 @3750Vac/1min Leakage Current ≤1mA
  N1,N2————Core @1750Vac/1min Leakage Current ≤1mA
  N3,N4————Core @1750Vac/1min Leakage Current ≤1mA
• Insulation Resistance (25℃):N1:≤140 mΩ N2:≤60 mΩ N3:≤2.5mΩ N4:≤40mΩ

4. Two Core Edging Process for Transformer

Cover the magnetic core with a layer of about 21mm*64mm long tape, and then fold the tape beyond the edge of the magnetic core to cover the entire edge of the magnetic core. The tape at the corner shall not be damaged.