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. 125-3652
Mfr. Part No.B66311G0250X187
BrandEPCOS
MYR1.794
Each (In a Pack of 20)
units
Ferrite Core Power Transformers 20.4 x 5.9 x 10.1mm 171nH N87 10.1mm 20.4mm 5.9mm - - - - - IEC 61246
RS Stock No. 170-7527
Mfr. Part No.FS-1ETD-5922-05
BrandBlock
MYR55.129
Each (In a Box of 18)
units
ETD 59 Choke Converter Topologies, Transmitter 59 x 22 x 31mm 5300nH N87 31mm 59mm 22mm - - - - - -
RS Stock No. 170-1403
Mfr. Part No.B65651W0000R030
BrandEPCOS
MYR9.417
Each (In a Box of 500)
units
Ferrite Core Broadband Transformers - 5900nH N30 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 125-3618
Mfr. Part No.B66229G0000X187
BrandEPCOS
MYR4.087
Each (In a Pack of 10)
units
Ferrite Core Power Transformers 32 x 9.5 x 16.4mm 2300nH N87 16.4mm 32mm 9.5mm - - - - - IEC 61246
RS Stock No. 167-8326
Mfr. Part No.B66365G0000X127
BrandEPCOS
MYR5.32
Each (In a Box of 144)
units
ETD 44 - 43.8 x 22.5 x 15.2mm 3300nH N27 15.2mm 43.8mm 22.5mm - - - - - -
RS Stock No. 125-3680
Mfr. Part No.B66367G1000X187
BrandEPCOS
MYR12.182
Each (In a Pack of 5)
units
Ferrite Core Power Transformers, SMPS Transformers 48.5 x 16.7 x 24.9mm 314nH N87 24.9mm 48.5mm 16.7mm - - - - - IEC 61185
RS Stock No. 170-1414
Mfr. Part No.B65733A0000R087
BrandEPCOS
MYR1,081.735
Each (On a Reel of 2)
units
Ferrite Core Power Transformers - 16000nH N87 93mm - 114mm - - - - - IEC 61247
RS Stock No. 212-5016
Mfr. Part No.B65646A0250A027
BrandEPCOS
MYR66.62
Each
units
PM 50/39 Power Transformer - 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 172-4783
Mfr. Part No.FS-1EFD-2007-02
BrandBlock
MYR5.326
Each (In a Box of 252)
units
EFD 20 Choke Converter Topologies, Transmitter 20 x 7 x 10mm 1200nH N87 10mm 20mm 7mm - - - - - -
RS Stock No. 170-1573
Mfr. Part No.B66397G0000X197
BrandEPCOS
MYR20.299
Each (On a Reel of 40)
units
Ferrite Core Power Transformers, SMPS Transformers 59.8 x 31.2 x 22.1mm 5500nH N97 22.1mm 59.8mm 31.2mm - - - - - IEC 61185
RS Stock No. 170-1558
Mfr. Part No.B66361G0500X187
BrandEPCOS
MYR2.42
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. 840-7579
Mfr. Part No.FS-1ETD-2910-05
BrandBlock
MYR12.45
Each
units
ETD 29 Choke Converter Topologies, Transmitter 29 x 10 x 16mm 2200nH N87 16mm 29mm 10mm - - - - - -
RS Stock No. 125-3599
Mfr. Part No.B65883A0000R095
BrandEPCOS
MYR29.775
Each (In a Pack of 2)
units
Ferrite Core Power Transformers 40.5 x 28 x 19.9mm 5500nH N95 19.9mm 40.5mm 28mm - - - - - IEC 62317-13
RS Stock No. 125-3426
Mfr. Part No.B65879B0000R095
BrandEPCOS
MYR21.185
Each (In a Pack of 2)
units
Ferrite Core Power Transformers 32 x 22 x 15.175mm 6100nH N95 15.175mm 32mm 22mm - - - - - IEC 62317-13
RS Stock No. 840-7711
Mfr. Part No.FS-1E-4220-10
BrandBlock
MYR22.56
Each
units
E 42 Transformers, Reactors 42 x 20 x 21.2mm 5200nH N87 21.2mm 42mm 20mm +210°C - - - - -
RS Stock No. 125-3340
Mfr. Part No.B65541D0000R048
BrandEPCOS
MYR6.46
Each (In a Pack of 10)
units
Ferrite Core Resonant Circuit Inductors - 2100nH N48 8.5mm - 14.3mm - - - - - IEC 60133
RS Stock No. 125-3702
Mfr. Part No.B66483G0000X197
BrandEPCOS
MYR6.292
Each (In a Pack of 10)
units
Ferrite Core Power Transformers 20 x 14 x 6.3mm 3200nH N97 6.3mm 20mm 14mm - - - - - IEC 62317-9
RS Stock No. 125-3672
Mfr. Part No.B66361G0500X187
BrandEPCOS
MYR4.566
Each (In a Pack of 5)
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. 170-1448
Mfr. Part No.B65819J0000R087
BrandEPCOS
MYR3.78
Each (On a Reel of 250)
units
Ferrite Core Power Transformers 20.3 x 17.2 x 13.5mm 2700nH N87 13.5mm 20.3mm 17.2mm - - - - - IEC 62317-4
RS Stock No. 170-1508
Mfr. Part No.B66283G0000X187
BrandEPCOS
MYR2.75
Each (On a Reel of 1008)
units
Ferrite Core Power Transformers 18 x 10 x 4mm 2600nH N87 4mm 18mm 10mm - ELP - - - IEC 62317-9
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