EF20 5+5 Switching Power Transformer Used For Switch Mode Power Supplies (SMPS), Linear Power Supplies And Dc-dc Converters; EMI/RFI Common Mode Inductors

Type: Switching power transformer 

Fullstar P/N : FTEF20-010  (Equivalent to Premier POL-INN012 )

Brand: Fullstar  

Specification :

Inductance: 673uH @ 100K,0.1V 

Leakage inductance: 30uH @ 100K, 0.1V 

Turns ratio :

Primary: Bias = 7.21: 1 

Primary: Secondary = 6.31:1 

Hipot: 3.0KV 60Hz@5mA for 1S 


Application : 

Transformers for switch mode power supplies (SMPS), linear power supplies and dc-dc converters; EMI/RFI common mode inductors, toroidal power inductors and current sense transformers.


 EF20 dimension.png

Sample show 


Other switching power transformer 


Choke and coils  



QQ:  1478124633

Skype: sophie84_2005116

Wechat : 55911767 

WhatsApp: 15829062422 

TEL: 86-29-86676405 / 

      15829062422/ 18192289495

Mail: sales@xfullstar.com


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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