Transformer Cores

Some transformers feature ferrite cores, which act as a means to transfer magnetic flux within the transformer. While less common than laminated iron cores, ferrite cores allow for superior performance.

How transformer ferrite cores work

These devices are commonly parts of switched-mode power supplies. The ferrite in the core is in powdered form, which allows the transform...

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EPCOS N87 ER 9.5/5 Transformer Ferrite Core, 800 nH, For Use With Power TransFormers
EPCOS N87 ER 9.5/5 Transformer Ferrite Core, 800 nH, For Use With Power TransFormers
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RS Stock No.: 125-3331Brand: EPCOSManufacturers Part No.: B65523J0000R087HSN Code: 85045000

SR 89.12

SR 3.565 Each (In a Pack of 25) (ex VAT)

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ER 9.5/5
Power TransFormers
Planar
800nH
N87
155°C
B65523
9.5mm
5 mm
5mm
IEC 62317-9
EPCOS N87 E 20/10/6 Transformer Ferrite Core, 171 nH, For Use With Power TransFormers
EPCOS N87 E 20/10/6 Transformer Ferrite Core, 171 nH, For Use With Power TransFormers
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RS Stock No.: 125-3652Brand: EPCOSManufacturers Part No.: B66311G0250X187HSN Code: 85045000

SR 78.89

SR 3.944 Each (In a Pack of 20) (ex VAT)

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E 20/10/6
Power TransFormers
Type E
171nH
N87
155°C
B66311
20.4mm
5.9 mm
10.1mm
IEC 61246
EPCOS N27 E 13/7/4 Transformer Ferrite Core, 800 nH, For Use With Power TransFormers, Miniature TransFormers
EPCOS N27 E 13/7/4 Transformer Ferrite Core, 800 nH, For Use With Power TransFormers, Miniature TransFormers
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RS Stock No.: 125-3640Brand: EPCOSManufacturers Part No.: B66305G0000X127HSN Code: 85045000

SR 79.92

SR 1.598 Each (In a Pack of 50) (ex VAT)

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E 13/7/4
Power TransFormers, Miniature TransFormers
Type E
800nH
N27
155°C
B66305
12.6mm
3.7 mm
6.5mm
IEC 61246
EPCOS N87 EFD 15/8/5 Transformer Ferrite Core, 100 nH, For Use With Power TransFormers, DC/DC Converter, Flat
EPCOS N87 EFD 15/8/5 Transformer Ferrite Core, 100 nH, For Use With Power TransFormers, DC/DC Converter, Flat
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RS Stock No.: 125-3689Brand: EPCOSManufacturers Part No.: B66413U0100K187HSN Code: 85045000

SR 78.43

SR 3.922 Each (In a Pack of 20) (ex VAT)

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EFD 15/8/5
Power TransFormers, DC/DC Converter, Flat TransFormers
-
100nH
N87
180°C
B66413
15mm
4.85 mm
7.5mm
IEC 61185
EPCOS N87 E 30/15/7 Transformer Ferrite Core, 1900 nH, For Use With Power TransFormers
EPCOS N87 E 30/15/7 Transformer Ferrite Core, 1900 nH, For Use With Power TransFormers
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RS Stock No.: 125-3658Brand: EPCOSManufacturers Part No.: B66319G0000X187HSN Code: 85045000

SR 110.17

SR 5.508 Each (In a Pack of 20) (ex VAT)

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E 30/15/7
Power TransFormers
-
1900nH
N87
155°C
B66319
30mm
7.3 mm
15.2mm
No
EPCOS T38 RM 6 Transformer Ferrite Core, 8600 nH, For Use With Broadband TransFormers
EPCOS T38 RM 6 Transformer Ferrite Core, 8600 nH, For Use With Broadband TransFormers
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RS Stock No.: 125-3378Brand: EPCOSManufacturers Part No.: B65807J0000Y038HSN Code: 85045000

SR 91.42

SR 18.285 Each (In a Pack of 5) (ex VAT)

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RM 6
Broadband TransFormers
Core without Centre Hole
8600nH
T38
155°C
B65807
17.9mm
14.7 mm
12.5mm
IEC 62317-4
EPCOS N87 ELP 32/6/20 Transformer Ferrite Core, 5700 nH, For Use With Power TransFormers
EPCOS N87 ELP 32/6/20 Transformer Ferrite Core, 5700 nH, For Use With Power TransFormers
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RS Stock No.: 125-3629Brand: EPCOSManufacturers Part No.: B66287G0000X187HSN Code: 85045000

SR 129.72

SR 12.972 Each (In a Pack of 10) (ex VAT)

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ELP 32/6/20
Power TransFormers
EELP 32
5700nH
N87
-
ELP
31.75mm
20.35 mm
6.35mm
IEC 62317-9
EPCOS N30 P 18/11 Transformer Ferrite Core, 5900 nH, For Use With Broadband TransFormers
EPCOS N30 P 18/11 Transformer Ferrite Core, 5900 nH, For Use With Broadband TransFormers
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RS Stock No.: 125-3350Brand: EPCOSManufacturers Part No.: B65651W0000R030HSN Code: 85045000

SR 125.58

SR 25.116 Each (In a Pack of 5) (ex VAT)

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P 18/11
Broadband TransFormers
Ferrite
5900nH
N30
155°C
B65651
10.6mm
18.4 mm
10.6mm
IEC 60133
EPCOS N27 E 25/13/7 Transformer Ferrite Core, 1750 nH, For Use With Power TransFormers
EPCOS N27 E 25/13/7 Transformer Ferrite Core, 1750 nH, For Use With Power TransFormers
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RS Stock No.: 125-3653Brand: EPCOSManufacturers Part No.: B66317G0000X127HSN Code: 85045000

SR 56.35

SR 2.818 Each (In a Pack of 20) (ex VAT)

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E 25/13/7
Power TransFormers
Type E
1750nH
N27
155°C
B66317
25mm
7.5 mm
12.8mm
IEC 61246
EPCOS N87 EFD 25 Transformer Ferrite Core, 2000 nH, For Use With DC DC Converter
EPCOS N87 EFD 25 Transformer Ferrite Core, 2000 nH, For Use With DC DC Converter
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Also available in industry standard packaging
RS Stock No.: 483-3618Brand: EPCOSManufacturers Part No.: B66421G0000X187HSN Code: 85045000

SR 51.46

SR 10.292 Each (In a Pack of 5) (ex VAT)

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EFD 25
DC DC Converter
-
2000nH
N87
180°C
B66421
25mm
12.5 mm
9.1mm
No
EPCOS N87 E 13/7/4 Transformer Ferrite Core, 850 nH, For Use With Miniature TransFormers, Power TransFormers
EPCOS N87 E 13/7/4 Transformer Ferrite Core, 850 nH, For Use With Miniature TransFormers, Power TransFormers
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RS Stock No.: 125-3641Brand: EPCOSManufacturers Part No.: B66305G0000X187HSN Code: 85045000

SR 127.08

SR 2.542 Each (In a Pack of 50) (ex VAT)

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E 13/7/4
Miniature TransFormers, Power TransFormers
Type E
850nH
N87
155°C
B66305
12.6mm
3.7 mm
6.5mm
IEC 61246
EPCOS N87 ETD 39/20/13 Transformer Ferrite Core, 2700 nH, For Use With Power TransFormers, SMPS transformers
EPCOS N87 ETD 39/20/13 Transformer Ferrite Core, 2700 nH, For Use With Power TransFormers, SMPS transformers
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RS Stock No.: 125-3673Brand: EPCOSManufacturers Part No.: B66363G0000X187HSN Code: 85045000

SR 77.11

SR 15.422 Each (In a Pack of 5) (ex VAT)

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ETD 39/20/13
Power TransFormers, SMPS transformers
-
2700nH
N87
155°C
B66363
38.9mm
12.8 mm
20mm
IEC 61185
EPCOS N87 EFD 30 Transformer Ferrite Core, 160 nH, For Use With DC DC Converter
EPCOS N87 EFD 30 Transformer Ferrite Core, 160 nH, For Use With DC DC Converter
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Also available in industry standard packaging
RS Stock No.: 647-9610Brand: EPCOSManufacturers Part No.: B66423U0160K187HSN Code: 85045000

SR 15.96

SR 7.981 Each (In a Pack of 2) (ex VAT)

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EFD 30
DC DC Converter
-
160nH
N87
180°C
B66423
30mm
15 mm
9.1mm
No
EPCOS N87 ELP Transformer Ferrite Core, 2600 nH, For Use With Power TransFormers
EPCOS N87 ELP Transformer Ferrite Core, 2600 nH, For Use With Power TransFormers
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RS Stock No.: 125-3625Brand: EPCOSManufacturers Part No.: B66283G0000X187HSN Code: 85045000

SR 65.20

SR 6.52 Each (In a Pack of 10) (ex VAT)

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ELP
Power TransFormers
EELP18
2600nH
N87
100°C
ELP
18mm
10 mm
4mm
IEC 62317-9
EPCOS N87 EP 20 Transformer Ferrite Core, 4000 nH, For Use With Power TransFormers
EPCOS N87 EP 20 Transformer Ferrite Core, 4000 nH, For Use With Power TransFormers
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RS Stock No.: 125-3416Brand: EPCOSManufacturers Part No.: B65847A0000R087HSN Code: 85045000

SR 48.39

SR 24.196 Each (In a Pack of 2) (ex VAT)

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EP 20
Power TransFormers
EP 20
4000nH
N87
155°C
B65847
24.5mm
15.3 mm
21.6mm
IEC 61596
EPCOS N97 EFD 25/13/9 Transformer Ferrite Core, 2100 nH, For Use With Flat TransFormers, Power TransFormers, DC/DC
EPCOS N97 EFD 25/13/9 Transformer Ferrite Core, 2100 nH, For Use With Flat TransFormers, Power TransFormers, DC/DC
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RS Stock No.: 125-3696Brand: EPCOSManufacturers Part No.: B66421G0000X197HSN Code: 85045000

SR 98.21

SR 4.91 Each (In a Pack of 20) (ex VAT)

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EFD 25/13/9
Flat TransFormers, Power TransFormers, DC/DC Converter
-
2100nH
N97
180°C
B66421
25mm
9.1 mm
12.5mm
No
EPCOS N87 E 25/13/7 Transformer Ferrite Core, 1850 nH, For Use With Power TransFormers
EPCOS N87 E 25/13/7 Transformer Ferrite Core, 1850 nH, For Use With Power TransFormers
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RS Stock No.: 125-3654Brand: EPCOSManufacturers Part No.: B66317G0000X187HSN Code: 85045000

SR 78.89

SR 3.944 Each (In a Pack of 20) (ex VAT)

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E 25/13/7
Power TransFormers
Type E
1850nH
N87
155°C
B66317
25mm
7.5 mm
12.8mm
IEC 61246
EPCOS N87 RM 5 Transformer Ferrite Core, 2000 nH, For Use With Power TransFormers
EPCOS N87 RM 5 Transformer Ferrite Core, 2000 nH, For Use With Power TransFormers
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RS Stock No.: 125-3368Brand: EPCOSManufacturers Part No.: B65805J0000R087HSN Code: 85045000

SR 90.39

SR 18.078 Each (In a Pack of 5) (ex VAT)

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RM 5
Power TransFormers
Ferrite
2000nH
N87
155°C
B65805
14.6mm
12.3 mm
10.5mm
IEC 62317-4
EPCOS N87 EFD 15/8/5 Transformer Ferrite Core, 780 nH, For Use With DC/DC Converter, Power TransFormers, Flat
EPCOS N87 EFD 15/8/5 Transformer Ferrite Core, 780 nH, For Use With DC/DC Converter, Power TransFormers, Flat
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RS Stock No.: 125-3687Brand: EPCOSManufacturers Part No.: B66413G0000X187HSN Code: 85045000

SR 56.58

SR 2.829 Each (In a Pack of 20) (ex VAT)

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EFD 15/8/5
DC/DC Converter, Power TransFormers, Flat TransFormers
-
780nH
N87
180°C
B66413
15mm
4.85 mm
7.5mm
IEC 61185
EPCOS N87 E 42 Transformer Ferrite Core, 3950 nH
EPCOS N87 E 42 Transformer Ferrite Core, 3950 nH
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Also available in industry standard packaging
RS Stock No.: 647-9317Brand: EPCOSManufacturers Part No.: B66325G0000X187HSN Code: 85045000

SR 32.61

SR 16.307 Each (In a Pack of 2) (ex VAT)

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E 42
-
Type E
3950nH
N87
100°C
B66325
42mm
21.2 mm
15.2mm
IEC 61246

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