Ferrite transformer cores for switching power supplies, DC/DC converters, chokes etc. EFD stands for Economic Flat Design and provides many advantages such as, e.g., low overall height, efficient volume use and a good price/performance ratio. The core halves are made of 3F3 which is the best material for frequencies up to 500 kHz.
Power IeAeVe
TypeWALμemmmm2mm3
EFD 1510-20700125034.015.0510
EFD 2020-501350140047.031.01460
EFD 2550-1002100145057.058.03300
EFD 30100-2002200150068.069.04700