Select Page

E and EFS cores

E cores are used for low to medium power transformers and transducers for a frequency range from 10 to 500 kHz. These high-frequency transformers generally consist of two mechanically produced wire-wound coils for primary and secondary excitation, the E core pairs and special clamps.

Transformers can transfer a maximum power of several kW in dependence of material and design.

Common-mode chokes are another important field of application for EE and EI cores. They are mainly used in small-signal technology and contain medium perm materials K4000 and K6000.

The product range comprises:

  • E cores according to IEC 61246
  • ETD cores according to IEC 61185
  • EP cores according to IEC 61596
  • ER cores
  • PE cores
Type Drw. no. nominal AL-values / nH datasheet
K2004 K2006 K2008 K2010 K4000 K6000
E 6,3/2 1 340 600 700 PDF Icon
E 8/2 1 470 750 960 PDF Icon
E 10/3 1 680 1000 1400 PDF Icon
E 13/4 1 850 920 920 1200 PDF Icon
E 15/4 1 950 1000 1100 PDF Icon
E 16/5 1 1050 1150 1150 1600 PDF Icon
E 16/6/7,4 1 2200 2300 2300 PDF Icon
EFS 16/7/12 2 1000 1050 PDF Icon
E 20/6 1 1350 1500 1500 PDF Icon
E 20/11 1 2450 2600 2800 PDF Icon
E 20/9/11 1 2500 2600 3000 PDF Icon
E 25/7 1 1900 2050 2050 3200 PDF Icon
E 25/11 1 2650 2700 3000 4600 PDF Icon
EFS 25/13/13 2 2600 2800 PDF Icon
E 30/7 1 1900 2050 2050 PDF Icon
EFS 30/11/15 3 2625 2700 PDF Icon
E 32/9 1 2300 2550 2550 PDF Icon
E 36/11 1 3150 3450 3450 PDF Icon
EFS 36/27/19,5 1 6100 6400 PDF Icon
E 42/15 1 3500 3600 3900 PDF Icon
E 42/20 1 5000 5100 5500 PDF Icon
E 55/21 1 5800 6100 6700 PDF Icon
E 65/27 1 7200 7450 7900 PDF Icon
E 70/32 1 8600 9150 9850 PDF Icon
E 80/20 1 4150 4400 4900 PDF Icon
E 100/28 1 5500 5800 6300 PDF Icon

E cores are made of K2004, K2006, K2008, K2001, K 2024 and K2500. For power materials, the following upper frequency limits can be observed depending upon excitation:

K 2004 ≤ 100 kHz
K 2006 ≤ 200 kHz
K 2008 ≤ 300 kHz
K 2010 ≤ 500 kHz
K 2001 ≤ 1.5 MHz
K 2024 ≤ 100 kHz
K 2026 ≤ 100 kHz
K 2500 ≤ 100 kHz

Drawing 1
Drawing 2
Drawing 3

Kaschke Components GmbH • Kaschke Components GmbH • Rudolf-Winkel-Str. 6 • 37079 Göttingen • Telefon +49 551 5058 6 • Telefax +49 551 65756