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. 647-9547
Mfr. Part No.B66417G0000X187
BrandEPCOS
£0.227
Each (In a Pack of 10)
Units
EFD 20 DC DC converter 20 x 10 x 6.65mm 1200nH N87 6.65mm 20mm 10mm - - - - - -
RS Stock No. 180-777
Mfr. Part No.B65887E0000R087
BrandEPCOS
£7.08
1 Pair
Pair(s)
RM 14 - 42.2 x 34.8 x 30.2mm 6000nH N87 30.2mm 42.2mm 34.8mm - - - - - -
RS Stock No. 125-3349
Mfr. Part No.B65651T0400A048
BrandEPCOS
£1.50
Each (In a Pack of 2)
Units
Ferrite Core Resonant Circuit Inductors - 400nH N48 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 167-8242
Mfr. Part No.B65815E0250A041
BrandEPCOS
£2.097
Each (In a Box of 100)
Units
RM 12 - 37.6 x 29.8 x 24.6mm 250nH N41 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 212-6643
Mfr. Part No.B65815E0250A041
BrandEPCOS
£3.62
Each
Units
RM 12 - 37.6 x 29.8 x 24.6mm 250nH N41 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 647-9373
Mfr. Part No.B66361G1000X187
BrandEPCOS
£1.08
Each (In a Pack of 2)
Units
ETD 34 - 34 x 17.5 x 11.1mm 135nH N87 11.1mm 34mm 17.5mm - - - - - -
RS Stock No. 180-828
Mfr. Part No.B65686A0000R087
BrandEPCOS
£38.19
1 Pair
Pair(s)
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N87 - 74mm 59mm - - - - - -
RS Stock No. 167-8312
Mfr. Part No.B66361G1000X187
BrandEPCOS
£0.559
Each (In a Box of 300)
Units
ETD 34 - 34 x 17.5 x 11.1mm 135nH N87 11.1mm 34mm 17.5mm - - - - - -
RS Stock No. 170-1402
Mfr. Part No.B65651T0400A048
BrandEPCOS
£1.473
Each (On a Reel of 500)
Units
Ferrite Core Resonant Circuit Inductors - 400nH N48 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 167-8302
Mfr. Part No.B65686A0000R087
BrandEPCOS
£34.721
Each
Units
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N87 - 74mm 59mm - - - - - -
RS Stock No. 125-3350
Mfr. Part No.B65651W0000R030
BrandEPCOS
£2.078
Each (In a Pack of 5)
Units
Ferrite Core Broadband Transformers - 5900nH N30 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 170-1403
Mfr. Part No.B65651W0000R030
BrandEPCOS
£1.009
Each (In a Box of 500)
Units
Ferrite Core Broadband Transformers - 5900nH N30 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 167-8386
Mfr. Part No.B66371G0000X127
BrandEPCOS
£4.759
Each (In a Box of 30)
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. 167-8300
Mfr. Part No.B66361G0000X127
BrandEPCOS
£0.458
Each (In a Box of 300)
Units
ETD 34 - 34 x 11.1 x 17.5mm 2400nH N27 17.5mm 34mm 11.1mm - - - - - -
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. 483-3573
Mfr. Part No.B66361G0000X127
BrandEPCOS
£0.838
Each (In a Pack of 5)
Units
ETD 34 - 34 x 11.1 x 17.5mm 2400nH N27 17.5mm 34mm 11.1mm - - - - - -
RS Stock No. 483-3624
Mfr. Part No.B66423G0000X187
BrandEPCOS
£0.834
Each (In a Pack of 5)
Units
EFD 30 DC DC converter 30 x 15 x 9.1mm 2050nH N87 9.1mm 30mm 15mm - - - - - -
RS Stock No. 167-8396
Mfr. Part No.B66395G0000X187
BrandEPCOS
£1.911
Each (In a Box of 81)
Units
ETD 54 - 54.5 x 27.8 x 19.3mm 4450nH N87 19.3mm 54.5mm 27.8mm - - - - - -
RS Stock No. 170-1549
Mfr. Part No.B66358G0000X187
BrandEPCOS
£0.597
Each (On a Reel of 300)
Units
Ferrite Core Power Transformers, SMPS Transformers 30.6 x 9.8 x 16mm 2200nH N87 16mm 30.6mm 9.8mm - - - - - IEC 61185
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 - - - - - -
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