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
		K2004	K2006	K2008	K2010	K4000	K6000
E 6,3/2	1		340			600	700
E 8/2	1		470			750	960
E 10/3	1		680			1000	1400
E 13/4	1		850	920	920	1200
E 15/4	1	950	1000	1100
E 16/5	1		1050	1150	1150	1600
E 16/6/7,4	1		2200	2300	2300
EFS 16/7/12	2		1000	1050
E 20/6	1		1350	1500	1500
E 20/11	1	2450	2600	2800
E 20/9/11	1	2500	2600	3000
E 25/7	1		1900	2050	2050	3200
E 25/11	1	2650	2700	3000		4600
EFS 25/13/13	2		2600	2800
E 30/7	1		1900	2050	2050
EFS 30/11/15	3		2625	2700
E 32/9	1		2300	2550	2550
E 36/11	1		3150	3450	3450
EFS 36/27/19,5	1		6100	6400
E 42/15	1	3500	3600	3900
E 42/20	1	5000	5100	5500
E 55/21	1	5800	6100	6700
E 65/27	1	7200	7450	7900
E 70/32	1	8600	9150	9850
E 80/20	1	4150	4400	4900
E 100/28	1	5500	5800	6300

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