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Products » EPCOS AG Ferrites and Cores » U and I Ferrite Cores »

U and I Ferrite Cores

Epcos AG produces 6 standard sizes of large U- and I-configured large ferrite cores made from power ferrite brands N27, N87, N97. High saturation induction combined with a high value of Curie temperature and with low losses of ferrite materials permits to efficiently use U- and I-configured cores as magnetic circuits of high-capacity power, pulse and high-voltage transformers for kW power range.

Information on characteristics of Epcos’s power materials and recommendations for their selection see here.

Find U and I ferrite cores in our stock

Geometrical Dimensions of Cores

Geometrical dimensions of U- and I-configured ferrite cores produced by Epcos AG.

Standard Size A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] Drawing
U93/76/16 93,0±1,8 76,0±0,5 16,0±0,5 48,0±0,9 ≥34,6 28,0±0,5
I93/28/16 93,0±1,8   16,0±0,5     28,0±0,5
U93/76/20 93,0±1,8 76,0±0,5 20,0±0,5 48,0±0,9 ≥34,6 28,0±0,5
I93/28/20 93,0±1,8   20,0±0,5     28,0±0,5
U93/76/30 93,0±1,8 76,0±0,5 30,0±0,5 48,0±0,9 ≥34,6 28,0±0,5
I93/28/30 93,0±1,8   30,0±0,5     28,0±0,5
U101/76/30 101,0±1,8 76,0±0,5 30,0±0,6 48,0±0,9 ≥45,0 28,0±0,5
U126/91/20 126,0±4,0 91,0±1,0 20,0±0,6 63,0±2,0 70,0±2,0  
U126/28/20 126,0±4,0   20,0±0,6     28,0±1,0
U141/78/30 141,0±5,0 78,0±0,5 30,0±1,0 33,5±1,0 ≥50,0  
I100/30/19 100,0±1,5   30,0±0,5     19,0±0,2

The most used combinations of U- and I-configured ferrite cores are shown in figures 1 – 3. In some cases for obtaining composite magnetic circuits of increased power, combination of U-shaped U-configured core and I-configured plated connected in column, is used.

Example of Constructing Powerful Transformers

Example of constructing powerful transformers based on combination of U-, I-configured ferrite cores.

Example of constructing powerful transformers based on combination of U-, I-configured ferrite cores.

Figure 1: Construction of powerful magnetic circuit based on combination of U- and I-configured ferrite cores.
Figure 2: Construction of powerful composite E-shaped core based on combination of U-configured ferrite cores.
Figure 3: Construction of powerful magnetic circuit based on combination of U-configured ferrite cores.

Electromagnetic and Effective Parameters

Electromagnetic and effective parameters of composite magnetic circuits based on combination of П-shaped U-configured ferrite cores and I-configured plares: UU and UI.

UU or UI
combinations
Material AL [nH/turn²] Used cores ∑l/A
[mm-1]
le [mm] Ae[ mm²] Ve [mm³]
UU93/152/16 N27
N87
2900±25%
3100±25%
B67345-B3-X27 +
B67345-B3-X27

B67345-B3-X87 +
B67345-B3-X87
0,79 354 448 159000
UI93/104/16 N27
N87
3800±25%
4100±25%
B67345-B3-X27 +
B67345-B4-X27

B67345-B3-X87 +
B67345-B4-X87
0,58 258 448 116000
UU93/152/20 N27
N87
3600±25%
3900±25%
B67345-B10-X27 +
B67345-B10-X27

B67345-B10-X87 +
B67345-B10-X87
0,63 354 560 198000
UI93/104/20 N27
N87
4900±25%
5300±25%
B67345-B10-X27 +
B67345-B11-X27

B67345-B10-X87 +
B67345-B11-X87
0,46 258 560 144000
UU93/152/30 N27
N87
N97
5400±25%
5700±25%
B67345-B1-X27 +
B67345-B1-X27

B67345-B1-X87 +
B67345-B1-X87

B67345-B1-X97 +
B67345-B1-X97
0,42 354 840 297000
UI93/104/30 N27
N87
N97
7400±25%
7900±25%
B67345-B1-X27 +
B67345-B2-X27

B67345-B1-X87 +
B67345-B2-X87

B67345-B1-X97 +
B67345-B2-X97
0,31 258 840 217000
UU101/152/30 N27
N87
4600±25%
5700±25%
B67370-A2-X27 +
B67370-A2-X27

B67370-A2-X87 +
B67370-A2-X87
0,44 368 840 310800
UU126/182/20 N87 3000±15%
B67385-G-X187 +
B67385-G-X187
0,86 480 560 269000
UI126/119/20 N87 3900±25% B67385-G-X187 +
B67385-P-X187
0,63 354 560 198000
UU141/156/30 N27
N87
N97
7500±30%
8900±30%

B67374-G-X127 +
B67374-G-X127

B67374-G-X187 +
B67374-G-X187

B67374-G-X197 +
B67374-G-X197
0,28 377 1350 508950

Designation in Design Documentation

Measurement unit — piece
N87 U93/76/30 B67345-B1-X87
B67345 — U93/76/30 standard size code
B1 — U-configured core
87 — magnetic circuit made from N87 ferrite material

Additional Information

To decrease losses on transportation and storage, it is recommended (as possible) to order U- and I-configured ferrite cores in multiples of amounts contained in factory package.

Standard Size Standard size code Amount in factory package, pcs
U 93/76/16 B67345B3*** 8
I 93/28/16 B67345B4*** 20
 
U 93/76/20 B67345B10*** 8
I 93/28/20 B67345B11*** 20
 
U 93/76/30 B67345B1*** 8
I 93/28/30 B67345B2*** 8
 
U101/76/30 B67370A2*** 8
 
U126/91/20 B67385G*** 4
I126/28/20 B67385P*** 8
 
U141/78/30 B67374G**** 4

*** — amount of U- and I-configured ferrite cores in pack is the same for cores of this standard size among all ferrite brands..

UR Ferrite Cores

Standard Size A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] Drawing
UR114/78/38 114,0±2,0 78,0-1,0 38,0-1,0 48,0+0,6 38,0-1,0 30,0-0,8

Below are shown magnetic characteristics of set consisting of two UR cores.

Standard Size Material AL [nH/turn²] Order code ∑l/A
[mm-1]
le [mm] Ae [mm²] Ve [mm³]
UR114/78/38 N87
7400±25%
B67324-G-X187 + B67324-G-X187
0,35 390 1100 429000
 
NORTH-WESTERN LABORATORY: NEWS
 
25.02 19 

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





14.01 19 

LEPCOS warehouse stock has been extended by cores on the base of amorphous and nanocrystalline ribbons produced by MSTATOR.





19.12 18 

LEPCOS company extended the warehouse stock with the TDK PQ cores on the base of PC47 power material including gapped and ungapped versions.





 
 


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