ETD CORES

ETD (Economical Transformer Design) cores were developed specifically for Power Transformer cores used in Switched Mode power supplies. The combined cross-sectional area of the two outer limbs equals the cross-sectional area of the centre limb allowing an even flux distribution throughout the core. This ensures the absence of localised ‘hot spots’ that can reduce performance at high frequencies or high flux levels. Their round centre limb provides for minimal winding resistance, leakage inductance and copper eddy current losses. ETD Cores are available in a range of sizes and materials as per IEC 62317-6 together with their associated coil formers (both Horizontal and Vertical mounting) and clips.

Dimensional details & AL Values with Tolerance Code

Part No.

Core

A

mm

B

mm

C

mm

D

mm

E

mm

F

mm

Effective Parameters

F5

F9

F5A

F44

F48

F9C

F10

le

mm

Ae

mm2

Ve

mm3

32-580-

ETD29/16/10

30.6-1.6

16-0.4

9.8-0.6

22+1.4

9.8-0.6

10.7+0.6

70.4

76

5376

-

-

2350/R

1950/R

2250/R

-

-

32-500-

ETD34/17/11

34+1       -0.6

17.5-0.4

11.1-0.6

25.6+1.4

11.1-0.6

11.8+0.6

78.6

97.10

7640

2400/R

-

2840/R

2250/R

2711/R

-

-

32-520-

ETD39/20/13

38.9+1.1       -0.7

20-0.4

12.8-0.6

29.3+1.6

12.8-0.6

14.2+0.8

92.20

125

11500

2700/R

-

3210/R

2470/R

2800/R

-

-

32-540-

ETD44/25/15

43.8+1.2       -0.8

22.5-0.4

15.2-0.8

32.5+1.6

15.2-0.8

16.1+0.8

103

173

17800

3300/R

-

3920/R

3100/R

-

-

-

32-560-

ETD49/25/17

48.5+1.3       -0.9

24.9-0.4

16.7-0.8

36.1+1.8

16.7-0.8

17.80Mini

114

211

24000

3700/R

-

4400/R

3525/R

4090/R

-

-

32-490-

ETD59/31/22

59.8 ±1.4

31.2-0.4

22.1-0.9

43.6+2.2

22.1-0.9

22+0.9

139

368

51200

5000/R

-

-

4900/R

5800/R

-

-

                                                                                                                                                                                                                                   R+30%, -20%

                                                                                                                                                                                                                                   Y+40%, -30%

o All values mentioned above are for an un gapped pair of cores

o Gapped Values can be provided on request

o All above Cores available in other materials on request