Encapsulated Transformer EF20 With 126mH Hi-pot 1.5KV, 50Hz, 5mA

High frequency transformer is the most important part of the switching power supply. Switching power supply generally adopts half bridge power conversion circuit, when the two switch transistor turns conduction to generate 100kHz high frequency pulse wave, and then through the high frequency transformer step-down output low voltage alternating current, high frequency transformer turns ratio of each winding is decided by the number of output voltage.


High frequency transformer is beyond the working frequency of intermediate frequency (10kHz power transformer, mainly used for high frequency switching power transformer, high frequency switching power supply is also used for high frequency inverter transformer high frequency inverter and high frequency inverter level, according to the working frequency can be divided into several classes: 10kHz-50kHz 50kHz-100kHz 100kHz 500kHz 500kHz 1MHz 1MHz. Transmission power relatively large working frequency is relatively low transmission power relatively small working frequency is higher.


Inductance : 126mH 

Frequency : 1KHz, 0.25V 

Hi-pot : 1.5Kv, 50Hz, 5mA , 1S 

Bobbin : 4+4 

Encapsulated version dimension 

Encapsulated dimension.png

Samples show 

sample show .jpg

Other switching power transformer 



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1.35 years of experience
2.Short delivery time, some parts are in stock

3.Factory-direct price
4.OEM projects
5.Samples are free and could be delivered in 4 days

6.Production capacity : 500,000 pcs/month

7.With complete and advanced automatic devices and more than 300 experienced staff
8.Complete certificates: UL insulation system, ISO 9001:2008, TS16949, RoHS

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