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. 125-3653
Mfr. Part No.B66317G0000X127
BrandEPCOS
$0.738
Each (In a Pack of 20)
units
Ferrite Core Power Transformers 25 x 7.5 x 12.8mm 1750nH N27 12.8mm 25mm 7.5mm - - - - - IEC 61246
RS Stock No. 125-3379
Mfr. Part No.B65807N0250A048
BrandEPCOS
$3.90
Each (In a Pack of 5)
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. 170-1558
Mfr. Part No.B66361G0500X187
BrandEPCOS
$0.911
Each (On a Reel of 300)
units
Ferrite Core Power Transformers, SMPS Transformers 34 x 11.1 x 17.5mm 251nH N87 17.5mm 34mm 11.1mm - - - - - IEC 61185
RS Stock No. 840-7563
Mfr. Part No.FS-1EFD-2007-02
BrandBlock
$2.16
Each
units
EFD 20 Choke Converter Topologies, Transmitter 20 x 7 x 10mm 1200nH N87 10mm 20mm 7mm - - - - - -
RS Stock No. 170-1441
Mfr. Part No.B65813J0000R097
BrandEPCOS
$3.26
Each (On a Reel of 200)
units
Ferrite Core Power Transformers 28.5 x 24.7 x 18.7mm 4200nH N97 18.7mm 28.5mm 24.7mm - - - - - IEC 62317-4
RS Stock No. 170-1522
Mfr. Part No.B66295G0000X187
BrandEPCOS
$10.89
Each (On a Reel of 60)
units
Ferrite Core Power Transformers 64 x 50.8 x 10.2mm 12500nH N87 10.2mm 64mm 50.8mm - ELP - - - IEC 62317-9
RS Stock No. 170-1575
Mfr. Part No.B66413G0000X187
BrandEPCOS
$0.346
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
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