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. 840-7169
Mfr. Part No.FS-1E-6527-00
BrandBlock
£6.74
Each
Units
E 65 Transformers, Reactors 65 x 27.4 x 32.8mm 7900nH N87 32.8mm 65mm 27.4mm +210°C - - - - -
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. 161-7778
Mfr. Part No.FS-1E-7032-10
BrandBlock
£6.914
Each (In a Box of 24)
Units
E 70 Reactors, Transformers 70.5 x 32 x 33.2mm 9700nH N87 33.2mm 70.5mm 32mm +210°C - - - - -
RS Stock No. 840-7711
Mfr. Part No.FS-1E-4220-10
BrandBlock
£2.56
Each
Units
E 42 Transformers, Reactors 42 x 20 x 21.2mm 5200nH N87 21.2mm 42mm 20mm +210°C - - - - -
RS Stock No. 170-7546
Mfr. Part No.FS-1E-4220-10
BrandBlock
£2.221
Each (In a Box of 34)
Units
E 42 Reactors, Transformers 42 x 20 x 21.2mm 5200nH N87 21.2mm 42mm 20mm +210°C - - - - -
RS Stock No. 840-7721
Mfr. Part No.FS-1E-7032-10
BrandBlock
£7.97
Each
Units
E 70 Transformers, Reactors 70.5 x 32 x 33.2mm 9700nH N87 33.2mm 70.5mm 32mm +210°C - - - - -
RS Stock No. 170-7526
Mfr. Part No.FS-1ETD-4916-05
BrandBlock
£3.06
Each (In a Box of 60)
Units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 170-7527
Mfr. Part No.FS-1ETD-5922-05
BrandBlock
£3.545
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. 840-7594
Mfr. Part No.FS-1ETD-4916-05
BrandBlock
£3.53
Each
Units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 840-7597
Mfr. Part No.FS-1ETD-5922-05
BrandBlock
£3.97
Each
Units
ETD 59 Choke Converter Topologies, Transmitter 59 x 22 x 31mm 5300nH N87 31mm 59mm 22mm - - - - - -
RS Stock No. 170-7517
Mfr. Part No.FS-1E-3007-02
BrandBlock
£0.287
Each (In a Box of 204)
Units
E 30 Reactors, Transformers 30 x 7.3 x 15.2mm 1900nH N87 15.2mm 30mm 7.3mm +210°C - - - - -
RS Stock No. 172-4774
Mfr. Part No.FS-1EFD-2007-00
BrandBlock
£0.32
Each (In a Box of 10)
Units
EFD 20 Choke Converter Topologies, Transmitter 20 x 7 x 10mm 1200nH N87 10mm 20mm 7mm - - - - - -
RS Stock No. 840-7507
Mfr. Part No.FS-1ETD-4916-02
BrandBlock
£1.93
Each
Units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 172-4827
Mfr. Part No.FS-1E-3209-05
BrandBlock
£1.189
Each (In a Box of 80)
Units
E 32/16/11 Reactors, Transformers 32 x 9.5 x 16.4mm 2300nH N87 16.4mm 32mm 9.5mm +210°C - - - - -
RS Stock No. 840-7601
Mfr. Part No.FS-1E-1605-05
BrandBlock
£0.45
Each
Units
E 16 Transformers, Reactors 16 x 4.7 x 8.2mm 1000nH N87 8.2mm 16mm 4.7mm +210°C - - - - -
RS Stock No. 170-7513
Mfr. Part No.FS-1ETD-4916-02
BrandBlock
£1.873
Each (In a Box of 60)
Units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 172-4789
Mfr. Part No.FS-1E-1605-05
BrandBlock
£0.439
Each (In a Box of 50)
Units
E 16 Reactors, Transformers 16 x 4.7 x 8.2mm 1000nH N87 8.2mm 16mm 4.7mm +210°C - - - - -
RS Stock No. 170-7540
Mfr. Part No.FS-1ETD-4415-10
BrandBlock
£2.465
Each (In a Box of 80)
Units
ETD 44 Choke Converter Topologies, Transmitter 44 x 15 x 22mm 3500nH N87 22mm 44mm 15mm - - - - - -
RS Stock No. 840-7673
Mfr. Part No.FS-1ETD-4415-10
BrandBlock
£2.85
Each
Units
ETD 44 Choke Converter Topologies, Transmitter 44 x 15 x 22mm 3500nH N87 22mm 44mm 15mm - - - - - -
RS Stock No. 840-7538
Mfr. Part No.FS-1E-3007-02
BrandBlock
£0.79
Each
Units
E 30 Transformers, Reactors 30 x 7.3 x 15.2mm 1900nH N87 15.2mm 30mm 7.3mm +210°C - - - - -