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. 212-5000
Mfr. Part No.B65646A0000R027
BrandEPCOS
TWD580.00
Each
units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 167-8304
Mfr. Part No.B66397G0000X187
BrandEPCOS
TWD178.80
Each (In a Box of 40)
units
ETD 59 SMPS transformer 59.8 x 31.2 x 22.1mm 5300nH N87 22.1mm 59.8mm 31.2mm - CRL - - - -
RS Stock No. 647-9519
Mfr. Part No.B66397G0000X187
BrandEPCOS
TWD276.00
Each (In a Pack of 2)
units
ETD 59 SMPS transformer 59.8 x 31.2 x 22.1mm 5300nH N87 22.1mm 59.8mm 31.2mm - - - - - -
RS Stock No. 162-0165
Mfr. Part No.B65646A0000R027
BrandEPCOS
TWD394.20
Each (In a Box of 30)
units
PM 50/39 - 65 x 52 x 45mm 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 167-8248
Mfr. Part No.B65807J0000R087
BrandEPCOS
TWD34.80
Each
units
RM 6 Transformer 17.9 x 14.7 x 12.5mm 2400nH N87 12.5mm 17.9mm 14.7mm - - - - - -
RS Stock No. 180-115
Mfr. Part No.B65807J0000R087
BrandEPCOS
TWD72.00
1 Pair
Pair(s)
RM 6 Transformer 17.9 x 14.7 x 12.5mm 2400nH N87 12.5mm 17.9mm 14.7mm - - - - - -
RS Stock No. 212-5016
Mfr. Part No.B65646A0250A027
BrandEPCOS
TWD580.00
Each
units
PM 50/39 Power Transformer - 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 167-8396
Mfr. Part No.B66395G0000X187
BrandEPCOS
TWD91.50
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. 167-8318
Mfr. Part No.B65646A0250A027
BrandEPCOS
TWD394.50
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. 125-3645
Mfr. Part No.B66307G0100X187
BrandEPCOS
TWD15.60
Each (In a Pack of 20)
units
Ferrite Core Common-Mode Chokes, Power Transformers 16 x 4.7 x 8.2mm 212nH N87 8.2mm 16mm 4.7mm - - - - - IEC 61246
RS Stock No. 170-1531
Mfr. Part No.B66307G0100X187
BrandEPCOS
TWD7.00
Each (On a Reel of 2000)
units
Ferrite Core Common-Mode Chokes, Power Transformers 16 x 4.7 x 8.2mm 212nH N87 8.2mm 16mm 4.7mm - - - - - IEC 61246
RS Stock No. 167-0349
Mfr. Part No.B66417G0000X187
BrandEPCOS
TWD8.90
Each (In a Box of 1260)
units
EFD 20 DC DC converter 20 x 10 x 6.65mm 1200nH N87 6.65mm 20mm 10mm - - - - - -
RS Stock No. 647-9480
Mfr. Part No.B66395G0000X187
BrandEPCOS
TWD145.50
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. 647-9547
Mfr. Part No.B66417G0000X187
BrandEPCOS
TWD17.80
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. 167-8334
Mfr. Part No.B66367G0500X187
BrandEPCOS
TWD62.30
Each (In a Box of 120)
units
ETD 49 SMPS Transformer 48.5 x 16.7 x 24.9mm 525nH N87 24.9mm 48.5mm 16.7mm - - - - - -
RS Stock No. 840-7608
Mfr. Part No.FS-1E-2507-05
BrandBlock
TWD61.00
Each
units
E 25 Reactors, Transformers 25 x 7.5 x 12.8mm 1850nH N87 12.8mm 25mm 7.5mm +210°C - - - - -
RS Stock No. 170-1416
Mfr. Part No.B65805J0000R030
BrandEPCOS
TWD26.10
Each (On a Reel of 500)
units
Ferrite Core Broadband Transformers 14.6 x 12.3 x 10.5mm 3500nH N30 10.5mm 14.6mm 12.3mm - - - - - IEC 62317-4
RS Stock No. 167-8326
Mfr. Part No.B66365G0000X127
BrandEPCOS
TWD45.40
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. 125-3633
Mfr. Part No.B66289G0000X187
BrandEPCOS
TWD103.00
Each (In a Pack of 5)
units
Ferrite Core Power Transformers 38.1 x 25.4 x 8.25mm 7200nH N87 8.25mm 38.1mm 25.4mm - ELP - - - IEC 62317-9
RS Stock No. 125-3683
Mfr. Part No.B66375G0000X187
BrandEPCOS
TWD287.00
Each
units
Ferrite Core Power Transformers 80 x 20.2 x 38.5mm 4500nH N87 38.5mm 80mm 20.2mm - - - - - -