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
TWD535.00
Each
units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 647-9519
Mfr. Part No.B66397G0000X187
BrandEPCOS
TWD160.50
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. 167-8304
Mfr. Part No.B66397G0000X187
BrandEPCOS
TWD164.90
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. 162-0165
Mfr. Part No.B65646A0000R027
BrandEPCOS
TWD363.60
Each (In a Box of 30)
units
PM 50/39 - 65 x 52 x 45mm 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 180-115
Mfr. Part No.B65807J0000R087
BrandEPCOS
TWD69.00
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. 167-8248
Mfr. Part No.B65807J0000R087
BrandEPCOS
TWD32.10
Each
units
RM 6 Transformer 17.9 x 14.7 x 12.5mm 2400nH N87 12.5mm 17.9mm 14.7mm - - - - - -
RS Stock No. 647-9480
Mfr. Part No.B66395G0000X187
BrandEPCOS
TWD138.50
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. 125-3645
Mfr. Part No.B66307G0100X187
BrandEPCOS
TWD14.20
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. 167-8396
Mfr. Part No.B66395G0000X187
BrandEPCOS
TWD87.20
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. 170-1531
Mfr. Part No.B66307G0100X187
BrandEPCOS
TWD6.30
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. 647-9547
Mfr. Part No.B66417G0000X187
BrandEPCOS
TWD16.90
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. 167-8318
Mfr. Part No.B65646A0250A027
BrandEPCOS
TWD363.90
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. 167-0349
Mfr. Part No.B66417G0000X187
BrandEPCOS
TWD7.90
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. 212-5016
Mfr. Part No.B65646A0250A027
BrandEPCOS
TWD535.00
Each
units
PM 50/39 Power Transformer - 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 647-9424
Mfr. Part No.B66365G0500X187
BrandEPCOS
TWD85.50
Each (In a Pack of 2)
units
ETD 49 SMPS Transformers 43.8 x 22.5 x 15.2mm 438nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS Stock No. 840-7721
Mfr. Part No.FS-1E-7032-10
BrandBlock
TWD677.00
Each
units
E 70 Reactors, Transformers 70.5 x 32 x 33.2mm 9700nH N87 33.2mm 70.5mm 32mm +210°C - - - - -
RS Stock No. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
TWD660.80
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. 647-9430
Mfr. Part No.B66365G0000X187
BrandEPCOS
TWD82.50
Each (In a Pack of 2)
units
ETD 44 - 43.8 x 22.5 x 15.2mm 3500nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS Stock No. 170-1565
Mfr. Part No.B66365G0000X197
BrandEPCOS
TWD63.90
Each (On a Reel of 144)
units
Ferrite Core Power Transformers, SMPS Transformers 43.8 x 15.2 x 22.5mm 3600nH N97 22.5mm 43.8mm 15.2mm - - - - - IEC 61185
RS Stock No. 125-3605
Mfr. Part No.B65981A0000R095
BrandEPCOS
TWD670.00
Each
units
Ferrite Core Power Transformers 50 x 32 x 25mm 8200nH N95 25mm 50mm 32mm - - - - - IEC 62317-13