mordashka
Magnetics Epcos (Siemens Matsushita Components), Germany TDK Ferroxcube
North West Laboratory

Engineering Center SZL and LEPCOS
— General representative of Epcos AG by ferrite in the CIS
— Official distributor and general representative for ferrites of
    TDK Electronics Europe Gmbh in the CIS
— Authorized distributor of Magnetics in Russia, CIS and Baltic countries
— Exclusive distributor of USM in Russia and CIS countries
— Official Distributor Temex Ceramics in Russia and CIS
 
Products » EPCOS AG Ferrites and Cores » E, EF Ferrite Cores »

E, EF Ferrite Cores

Epcos issues 29 names of standard size ferrite cores E with dimensions from E5 to E80/30/20. Most often used cores are made from basic power ferrite brands N27 (for transformers and chokes intended for operation in frequency band of up to 100 kHz) and N87 (up to 500 kHz).

The advantages of using the E configuration ferrite cores may be attributed to low cost of the core itself in combination with a wide choice of winding frames and also a low labor content cost for manufacturing wrapped products on their base due to a simplicity of performing a row winding using machines.

Find needed E-cores in our stock

Geometric Dimensions of E cores

Standard Size A [mm] B [mm] C [mm] D [mm] h1 [mm] h2 [mm]
E 6,3 6,3-0,25 2,0-0,1 min. 3,6 1,4-0,1 2,9-0,1 1,85+0,15
E 13/7/4 12,6±0,4 3,7-0,3 min. 8,9 3,7-0,3 6,5-0,2 4,5+0,3
E 16/8/5 16,0±0,5 4,7-0,4 min. 11,3 4,7-0,3 8,2-0,3 5,7+0,4
E 16/8/4 (SH4*4) 16,0±0,5-0,7 4,0-0,4 10,4+1,0 4-0,5 8±0,25 5,2+0,4
E 16/8/7,8 (SH4*8) 16,0±0,5 8,0-0,5 10,9±0,5 4-0,4 8+0,25 5,2+0,4
E 20/10/6 20,4-0,8 5,9-0,4 min. 14,1 5,9-0,3 10,1-0,3 7,0+0,3
E 25/13/7 25,0±0,7 7,5-0,6 min. 17,5 7,5-0,5 12,8-0,5 8,7+0,5
E 30/15/7 30,0±0,6 7,3-0,5 min. 19,5 7,2-0,5 15,2-0,4 9,7+0,6
E 32/16/11 32,0±0,7 11,0-0,7 22,7+0,1 9,5-0,6 16,4-0,6 11,2+0,6
E 34/14/9 34,6±0,7 9,7-0,8 min. 25,1 9,65-0,55 14,65-0,75 9,5+0,5
E 36/18/11 36,0±0,5 11,5-0,5 min. 24,5 10,2-0,5 18,0-0,4 12,0+0,6
E 40/16/12 40,6±0,6 12,5±0,25 min. 28,6 12,5±0,25 16,5±0,2 10,5±0,3
E 42/21/15 42,0±0,7 15,2-0,5 min. 29,5 12,2-0,5 21,2-0,4 14,8+0,7
E 42/21/20 42,0±0,7 20,0-0,8 min. 29,5 12,2-0,5 21,2-0,4 14,8+0,7
E 55/28/21 55,0±0,9 21,0-0,6 min. 37,5 17,2-0,5 27,8-0,6 18,5+0,8
E 55/28/25 55,0±0,9 25,0-0,6 min. 37,5 17,2-0,5 27,8-0,6 18,5+0,8
E 65/32/27 65,0±1,2 27,4-1,0 min. 44,2 20,0-0,7 32,8-0,6 22,2+0,8
E 70/33/32 70,5±1,0 32,0-0,8 min. 48,0 22,0-0,7 33,2-0,5 21,9+0,7
E 80/38/20 80,0±1,8 20,2-0,8 min. 58,9 20,2-0,8 38,5-0,8 27,9+0,8

The information on a standard range of winding accessories that are issued by Epcos AG for E configuration ferrite cores may be accessed by opening an appropriate pdf file from the table given above.

The Lepcos Company also recommends a using together with E configuration ferrite cores produced by Epcos AG, additional range of products low cost bobbins of other producers. Such products were good acknowledged with regard to their quality and more than 10-year experience of their using by leading manufacturers of radio-electronic industry in Russia.

The Determination in a Technical Documentation

Example of EPCOS code explanation and designation in design documentation

Measurement unit — piece (half-piece)
E42/21/20 B66329GX187 — full name of ferrite core.
E42/21/20 — configuration and standard size of core.
B66329 — code of E42/21/20 standard size.
87 — core is made from N87 ferrite brand.

Additional Information

In practice, all standard size series of Ш-shape cores (used in Russia) have full range of analogues in terms of geometric dimensions of E configuration ferrite cores. It simplifies their replacement by prototypes issued by Epcos and made from modern materials, without changing any setup dimensions on board. Conformance table may be viewed in this page (in Russian).

To decrease losses on transportation and storage it is recommended (as possible) to order cores in multiples of factory packs. Information on cores number in standard factory foam package is given in this page (in Russian).

 
NORTH-WESTERN LABORATORY: NEWS
 
26.06 19 
According to the results of 2018 Lepcos has received "best ferrites seller 2018" seal of excellence from TDK company.



18.04 19 
Dear colleagues! We would like to draw your attention to the fact that, since December 2018, the package content of electrolytic capacitors has been changed.



25.02 19 

LEPCOS has has expanded the range of amorphous and nanocrystalline cores manufactured by MSTATOR company.





 
 


«North West Laboratory» © 1999—2019

Development & support — Marina Kutuzova