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.: B65523J0000R087

€ 28.91

€ 1.156 Each (In a Pack of 25) (Exc. VAT)

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ER 9.5/5
Power TransFormers
Planar
800nH
N87
155°C
B65523
5mm
IEC 62317-9
5 mm
9.5mm
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.: B66311G0250X187

€ 22.42

€ 1.121 Each (In a Pack of 20) (Exc. VAT)

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E 20/10/6
Power TransFormers
Type E
171nH
N87
155°C
B66311
10.1mm
IEC 61246
5.9 mm
20.4mm
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.: B66305G0000X127

€ 22.42

€ 0.448 Each (In a Pack of 50) (Exc. VAT)

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E 13/7/4
Power TransFormers, Miniature TransFormers
Type E
800nH
N27
155°C
B66305
6.5mm
IEC 61246
3.7 mm
12.6mm
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.: B66413U0100K187

€ 17.94

€ 0.897 Each (In a Pack of 20) (Exc. VAT)

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EFD 15/8/5
Power TransFormers, DC/DC Converter, Flat TransFormers
-
100nH
N87
180°C
B66413
7.5mm
IEC 61185
4.85 mm
15mm
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.: B66319G0000X187

€ 32.10

€ 1.605 Each (In a Pack of 20) (Exc. VAT)

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E 30/15/7
Power TransFormers
-
1900nH
N87
155°C
B66319
15.2mm
No
7.3 mm
30mm
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.: B65807J0000Y038

€ 26.25

€ 5.251 Each (In a Pack of 5) (Exc. VAT)

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RM 6
Broadband TransFormers
Core without Centre Hole
8600nH
T38
155°C
B65807
12.5mm
IEC 62317-4
14.7 mm
17.9mm
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.: B66287G0000X187

€ 37.17

€ 3.717 Each (In a Pack of 10) (Exc. VAT)

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ELP 32/6/20
Power TransFormers
EELP 32
5700nH
N87
-
ELP
6.35mm
IEC 62317-9
20.35 mm
31.75mm
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.: B65651W0000R030

€ 36.11

€ 7.222 Each (In a Pack of 5) (Exc. VAT)

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P 18/11
Broadband TransFormers
Ferrite
5900nH
N30
155°C
B65651
10.6mm
IEC 60133
18.4 mm
10.6mm
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.: B66317G0000X127

€ 16.28

€ 0.814 Each (In a Pack of 20) (Exc. VAT)

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E 25/13/7
Power TransFormers
Type E
1750nH
N27
155°C
B66317
12.8mm
IEC 61246
7.5 mm
25mm
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.: B66421G0000X187

€ 14.87

€ 2.974 Each (In a Pack of 5) (Exc. VAT)

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EFD 25
DC DC Converter
-
2000nH
N87
180°C
B66421
9.1mm
No
12.5 mm
25mm
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.: B66305G0000X187

€ 37.17

€ 0.743 Each (In a Pack of 50) (Exc. VAT)

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E 13/7/4
Miniature TransFormers, Power TransFormers
Type E
850nH
N87
155°C
B66305
6.5mm
IEC 61246
3.7 mm
12.6mm
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.: B66363G0000X187

€ 17.46

€ 3.493 Each (In a Pack of 5) (Exc. VAT)

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ETD 39/20/13
Power TransFormers, SMPS transformers
-
2700nH
N87
155°C
B66363
20mm
IEC 61185
12.8 mm
38.9mm
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.: B66423U0160K187

€ 4.60

€ 2.301 Each (In a Pack of 2) (Exc. VAT)

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EFD 30
DC DC Converter
-
160nH
N87
180°C
B66423
9.1mm
No
15 mm
30mm
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.: B66283G0000X187

€ 18.64

€ 1.864 Each (In a Pack of 10) (Exc. VAT)

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ELP
Power TransFormers
EELP18
2600nH
N87
100°C
ELP
4mm
IEC 62317-9
10 mm
18mm
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.: B65847A0000R087

€ 16.07

€ 8.036 Each (In a Pack of 2) (Exc. VAT)

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2

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EP 20
Power TransFormers
EP 20
4000nH
N87
155°C
B65847
21.6mm
IEC 61596
15.3 mm
24.5mm
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.: B66421G0000X197

€ 28.32

€ 1.416 Each (In a Pack of 20) (Exc. VAT)

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EFD 25/13/9
Flat TransFormers, Power TransFormers, DC/DC Converter
-
2100nH
N97
180°C
B66421
12.5mm
No
9.1 mm
25mm
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.: B66317G0000X187

€ 22.42

€ 1.121 Each (In a Pack of 20) (Exc. VAT)

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E 25/13/7
Power TransFormers
Type E
1850nH
N87
155°C
B66317
12.8mm
IEC 61246
7.5 mm
25mm
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.: B65805J0000R087

€ 26.02

€ 5.204 Each (In a Pack of 5) (Exc. VAT)

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5

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RM 5
Power TransFormers
Ferrite
2000nH
N87
155°C
B65805
10.5mm
IEC 62317-4
12.3 mm
14.6mm
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.: B66413G0000X187

€ 16.28

€ 0.814 Each (In a Pack of 20) (Exc. VAT)

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EFD 15/8/5
DC/DC Converter, Power TransFormers, Flat TransFormers
-
780nH
N87
180°C
B66413
7.5mm
IEC 61185
4.85 mm
15mm
EPCOS N48 P 18/11 Transformer Ferrite Core, 400 nH, For Use With Resonant Circuit Inductors
EPCOS N48 P 18/11 Transformer Ferrite Core, 400 nH, For Use With Resonant Circuit Inductors
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RS Stock No.: 125-3349Brand: EPCOSManufacturers Part No.: B65651T0400A048

€ 16.07

€ 8.036 Each (In a Pack of 2) (Exc. VAT)

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P 18/11
Resonant Circuit Inductors
-
400nH
N48
-
-
10.6mm
No
18.4 mm
-

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