EFD Cores

EFD (Economical Flat Design) cores were developed to meet the increasing demand for low profile components in power transformer design. A combination of very low height and excellent throughput power, when compared to other cores of a similar height, make these cores ideal where space considerations are a priority. EFD Cores are available in a range of sizes and materials as per IEC 62317-14 together with their associated coil formers and clips.

Materials - Manganese Zinc Materials - Nickel Zinc EFD Cores Table

Dimensional details & AL Values with Tolerance Code

Part

No.

Core

A

 

B

 

C

 

D

 

E

 

F

 

G

 

le

mm

Ae

mm2

Ve

mm3

F44

F47

F48

32-720-

EFD15x8x5

15+0.4

7.5+0.15

4.65+0.15

11+0.35

5.55+0.2

2.4+0.1

5.3+0.15

34

15

510

675R

650R

780R

32-740-

EFD20x10x7

20+0.55

10+0.15

6.65+0.15

15.4+0.5

7.75+0.2

3.6+0.15

8.9+0.2

47

31

1460

1120R

1075R

1200R

32-760-

EFD25x13x9

25+0.65

12.5+0.15

9.1+0.2

18.7+0.6

9.3+0.25

5.2+0.15

11.4+0.2

57

58

3300

1790R

1720R

2200R

 

15+0.4

7.5+0.15

4.65+0.15

11+0.35

5.55+0.2

2.4+0.1

5.3+0.15

 

20+0.55

10+0.15

6.65+0.15

15.4+0.5

7.75+0.2

3.6+0.15

8.9+0.2

 

25+0.65

12.5+0.15

9.1+0.2

18.7+0.6

9.3+0.25

5.2+0.15

11.4+0.2