Transformer Ferrite 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 transformer to operate at very high frequencies. The devices can handle a great deal of power without huge increases in the size of the device.

Types of transformer ferrite cores

Different transformer ferrite cores are intended to be used with specific kinds of equipment. These include broadband transformers, DC/DC converters, flat transformers, power transformers, reactors, switch mode power supply (SMPS ) transformers, and transmitters.

In addition to length, depth, and width, transformer ferrite cores also vary in their minimum and maximum operating temperatures. It is important to consider the operating temperature of the equipment that the core will be used in when choosing between cores. For instance, between one with a maximum temperature of +125°Cand another with one of +210°C.


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Description Price Accessory Type For Use With Dimensions AL Rating Material Depth Length Width Maximum Temperature Series Input Voltage Range Maximum Operating Temperature Minimum Operating Temperature Standards Met
RS Stock No. 125-3400
Mfr. Part No.B65819N0315A048
BrandEPCOS
£1.114
Each (In a Pack of 5)
Units
Ferrite Core Resonant Circuit Inductors, Transformers 20.3 x 17.2 x 13.5mm 315nH N48 13.5mm 20.3mm 17.2mm - - - - - IEC 62317-4
RS Stock No. 125-3654
Mfr. Part No.B66317G0000X187
BrandEPCOS
£0.387
Each (In a Pack of 20)
Units
Ferrite Core Power Transformers 25 x 7.5 x 12.8mm 1850nH N87 12.8mm 25mm 7.5mm - - - - - IEC 61246
RS Stock No. 125-3704
Mfr. Part No.B67385P0000X187
BrandEPCOS
£18.51
Each
Units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 125-3687
Mfr. Part No.B66413G0000X187
BrandEPCOS
£0.367
Each (In a Pack of 20)
Units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 780nH N87 7.5mm 15mm 4.85mm - - - - - IEC 61185
RS Stock No. 170-1575
Mfr. Part No.B66413G0000X187
BrandEPCOS
£0.223
Each (On a Reel of 1920)
Units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 780nH N87 7.5mm 15mm 4.85mm - - - - - IEC 61185
RS Stock No. 170-1529
Mfr. Part No.B66307G0000X187
BrandEPCOS
£0.118
Each (In a Box of 2000)
Units
Ferrite Core Common-Mode Chokes, Power Transformers 16 x 4.7 x 8.2mm 1000nH N87 8.2mm 16mm 4.7mm - - - - - IEC 61246
RS Stock No. 170-1430
Mfr. Part No.B65807N0250A048
BrandEPCOS
£0.968
Each (On a Reel of 500)
Units
Ferrite Core Resonant Circuit Inductors, Transformers 17.9 x 14.7 x 12.5mm 250nH N48 12.5mm 17.9mm 14.7mm - - - - - IEC 62317-4
RS Stock No. 170-1452
Mfr. Part No.B65819N0315A048
BrandEPCOS
£1.046
Each (On a Reel of 250)
Units
Ferrite Core Resonant Circuit Inductors, Transformers 20.3 x 17.2 x 13.5mm 315nH N48 13.5mm 20.3mm 17.2mm - - - - - IEC 62317-4
RS Stock No. 213-0579
Mfr. Part No.B66339G0000X127
BrandEPCOS
£0.685
Each (In a Pack of 2)
Units
EC 41 - 40.6 x 19.65 x 11.9mm 2700nH N27 11.9mm 40.6mm 19.65mm - - - - - -
RS Stock No. 170-1540
Mfr. Part No.B66317G0000X187
BrandEPCOS
£0.265
Each (On a Reel of 900)
Units
Ferrite Core Power Transformers 25 x 7.5 x 12.8mm 1850nH N87 12.8mm 25mm 7.5mm - - - - - IEC 61246
RS Stock No. 170-1593
Mfr. Part No.B67385P0000X187
BrandEPCOS
£13.213
Each (On a Reel of 8)
Units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 162-0164
Mfr. Part No.B66339G0000X127
BrandEPCOS
£0.684
Each (In a Box of 208)
Units
EC 41 - 40.6 x 19.65 x 11.9mm 2700nH N27 11.9mm 40.6mm 19.65mm - - - - - -
RS Stock No. 125-3644
Mfr. Part No.B66307G0000X187
BrandEPCOS
£0.131
Each (In a Pack of 20)
Units
Ferrite Core Common-Mode Chokes, Power Transformers 16 x 4.7 x 8.2mm 1000nH N87 8.2mm 16mm 4.7mm - - - - - IEC 61246
RS Stock No. 212-5000
Mfr. Part No.B65646A0000R027
BrandEPCOS
£13.30
Each
Units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 170-1535
Mfr. Part No.B66311G0000X127
BrandEPCOS
£0.124
Each (On a Reel of 1470)
Units
Ferrite Core Power Transformers 20.4 x 5.9 x 10.1mm 1300nH N27 10.1mm 20.4mm 5.9mm - - - - - IEC 61246
RS Stock No. 170-1383
Mfr. Part No.B65517D0250J048
BrandEPCOS
£549.78
1 Reel of 1000
Reel(s)
Ferrite Core Resonant Circuit Inductors - 250nH N48 5.4mm - 9.3mm - - - - - IEC 60133
RS Stock No. 647-9660
Mfr. Part No.B67345B0002X087
BrandEPCOS
£17.92
Each
Units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
RS Stock No. 125-3328
Mfr. Part No.B65517D0250J048
BrandEPCOS
£1.072
Each (In a Pack of 10)
Units
Ferrite Core Resonant Circuit Inductors - 250nH N48 5.4mm - 9.3mm - - - - - IEC 60133
RS Stock No. 125-3649
Mfr. Part No.B66311G0000X127
BrandEPCOS
£0.132
Each (In a Pack of 20)
Units
Ferrite Core Power Transformers 20.4 x 5.9 x 10.1mm 1300nH N27 10.1mm 20.4mm 5.9mm - - - - - IEC 61246
RS Stock No. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
£12.533
Each (In a Box of 8)
Units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
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