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. 170-1540
Mfr. Part No.B66317G0000X187
BrandEPCOS
£0.206
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. 125-3644
Mfr. Part No.B66307G0000X187
BrandEPCOS
£0.308
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. 125-3687
Mfr. Part No.B66413G0000X187
BrandEPCOS
£0.434
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. 170-1430
Mfr. Part No.B65807N0250A048
BrandEPCOS
£0.935
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. 125-3379
Mfr. Part No.B65807N0250A048
BrandEPCOS
£1.938
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. 170-1575
Mfr. Part No.B66413G0000X187
BrandEPCOS
£0.188
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. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
£14.848
Each (In a Box of 8)
Units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
RS Stock No. 125-3653
Mfr. Part No.B66317G0000X127
BrandEPCOS
£0.403
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. 162-0165
Mfr. Part No.B65646A0000R027
BrandEPCOS
£8.858
Each (In a Box of 30)
Units
PM 50/39 - 65 x 52 x 45mm 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 647-9660
Mfr. Part No.B67345B0002X087
BrandEPCOS
£16.61
Each
Units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
RS Stock No. 212-5000
Mfr. Part No.B65646A0000R027
BrandEPCOS
£13.05
Each
Units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 125-3328
Mfr. Part No.B65517D0250J048
BrandEPCOS
£1.07
Each (In a Pack of 10)
Units
Ferrite Core Resonant Circuit Inductors - 250nH N48 5.4mm - 9.3mm - - - - - IEC 60133
RS Stock No. 170-1383
Mfr. Part No.B65517D0250J048
BrandEPCOS
£0.578
Each (On a Reel of 1000)
Units
Ferrite Core Resonant Circuit Inductors - 250nH N48 5.4mm - 9.3mm - - - - - IEC 60133
RS Stock No. 170-1539
Mfr. Part No.B66317G0000X127
BrandEPCOS
£0.229
Each (On a Reel of 900)
Units
Ferrite Core Power Transformers 25 x 7.5 x 12.8mm 1750nH N27 12.8mm 25mm 7.5mm - - - - - IEC 61246
RS Stock No. 170-1544
Mfr. Part No.B66319G0000X187
BrandEPCOS
£0.284
Each (On a Reel of 850)
Units
Ferrite Core Power Transformers 30 x 7.3 x 15.2mm 1900nH N87 15.2mm 30mm 7.3mm - - - - - -
RS Stock No. 170-7466
Mfr. Part No.FS-1E-6527-00
BrandBlock
£5.84
Each (In a Box of 10)
Units
E 65 Reactors, Transformers 65 x 27.4 x 32.8mm 7900nH N87 32.8mm 65mm 27.4mm +210°C - - - - -
RS Stock No. 212-5016
Mfr. Part No.B65646A0250A027
BrandEPCOS
£11.91
Each
Units
PM 50/39 Power Transformer - 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 167-8318
Mfr. Part No.B65646A0250A027
BrandEPCOS
£9.065
Each (In a Box of 30)
Units
PM 39, PM 50 Power Transformer 65 x 52 x 45mm 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 167-8316
Mfr. Part No.B65686A0000R027
BrandEPCOS
£28.804
Each (In a Box of 10)
Units
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N27 59mm 74mm - - - - - - -
RS Stock No. 125-3658
Mfr. Part No.B66319G0000X187
BrandEPCOS
£0.686
Each (In a Pack of 20)
Units
Ferrite Core Power Transformers 30 x 7.3 x 15.2mm 1900nH N87 15.2mm 30mm 7.3mm - - - - - -