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. 647-9480
Mfr. Part No.B66395G0000X187
BrandEPCOS
£2.88
Each (In a Pack of 2)
Units
ETD 54 - 54.5 x 27.8 x 19.3mm 4450nH N87 19.3mm 54.5mm 27.8mm - - - - - -
RS Stock No. 647-9367
Mfr. Part No.B66371G0000X127
BrandEPCOS
£6.06
Each (In a Pack of 2)
Units
E 32, E 33, E 70 Transformer 70.5 x 32 x 33.2mm 8850nH N27 33.2mm 70.5mm 32mm - - - - - -
RS Stock No. 167-8340
Mfr. Part No.B65684A0000R027
BrandEPCOS
£12.064
Each (In a Box of 20)
Units
PM 62/49 DC DC converter 62 (Dia.) x 49mm 9200nH N27 - - - - - - - - -
RS Stock No. 212-5044
Mfr. Part No.B65684A0000R027
BrandEPCOS
£13.27
Each
Units
PM 62/49 DC DC converter 62 (Dia.) x 49mm 9200nH N27 - - - - - - - - -
RS Stock No. 170-1460
Mfr. Part No.B65841A0000R087
BrandEPCOS
£0.355
Each (On a Reel of 1000)
Units
Ferrite Core Power Transformers 11.8 x 7.85 x 10.4mm 1100nH N87 10.4mm 11.8mm 7.85mm - - - - - IEC 61596
RS Stock No. 125-3409
Mfr. Part No.B65841A0000R087
BrandEPCOS
£0.683
Each (In a Pack of 10)
Units
Ferrite Core Power Transformers 11.8 x 7.85 x 10.4mm 1100nH N87 10.4mm 11.8mm 7.85mm - - - - - IEC 61596
RS Stock No. 647-9339
Mfr. Part No.B66329G0000X187
BrandEPCOS
£1.96
Each (In a Pack of 2)
Units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 167-8329
Mfr. Part No.B66329G0000X187
BrandEPCOS
£1.088
Each (In a Box of 120)
Units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 167-8380
Mfr. Part No.B66365G0000X187
BrandEPCOS
£1.019
Each (In a Box of 144)
Units
ETD 44 - 43.8 x 22.5 x 15.2mm 3500nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS Stock No. 647-9430
Mfr. Part No.B66365G0000X187
BrandEPCOS
£1.835
Each (In a Pack of 2)
Units
ETD 44 - 43.8 x 22.5 x 15.2mm 3500nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS Stock No. 170-1442
Mfr. Part No.B65813N0630A048
BrandEPCOS
£1.637
Each (On a Reel of 200)
Units
Ferrite Core Resonant Circuit Inductors, Transformers 28.5 x 24.7 x 18.7mm 630nH N48 18.7mm 28.5mm 24.7mm - - - - - IEC 62317-4
RS Stock No. 125-3392
Mfr. Part No.B65813N0630A048
BrandEPCOS
£1.66
Each (In a Pack of 2)
Units
Ferrite Core Resonant Circuit Inductors, Transformers 28.5 x 24.7 x 18.7mm 630nH N48 18.7mm 28.5mm 24.7mm - - - - - IEC 62317-4
RS Stock No. 162-0164
Mfr. Part No.B66339G0000X127
BrandEPCOS
£0.823
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. 170-1593
Mfr. Part No.B67385P0000X187
BrandEPCOS
£13.524
Each (On a Reel of 8)
Units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 125-3654
Mfr. Part No.B66317G0000X187
BrandEPCOS
£0.473
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. 170-1529
Mfr. Part No.B66307G0000X187
BrandEPCOS
£0.137
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. 125-3704
Mfr. Part No.B67385P0000X187
BrandEPCOS
£14.88
Each
Units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 213-0579
Mfr. Part No.B66339G0000X127
BrandEPCOS
£1.48
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. 170-1452
Mfr. Part No.B65819N0315A048
BrandEPCOS
£1.323
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. 125-3400
Mfr. Part No.B65819N0315A048
BrandEPCOS
£2.892
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