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. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
R 27.25
Each
units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS stock no. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
R 43.40
1 Pair
Pair(s)
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS stock no. 170-7535
Mfr. Part No.FS-1ETD-3411-10
BrandBlock
R 27.679
Each (In a Box of 144)
units
ETD 34 Choke Converter Topologies, Transmitter 34 x 11 x 17mm 2600nH N87 17mm 34mm 11mm - - - - - -
RS stock no. 167-8304
Mfr. Part No.B66397G0000X187
BrandEPCOS
R 114.719
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
R 162.635
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. 840-7660
Mfr. Part No.FS-1ETD-3411-10
BrandBlock
R 21.03
Each
units
ETD 34 Choke Converter Topologies, Transmitter 34 x 11 x 17mm 2600nH N87 17mm 34mm 11mm - - - - - -
RS stock no. 167-8312
Mfr. Part No.B66361G1000X187
BrandEPCOS
R 16.258
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. 647-9373
Mfr. Part No.B66361G1000X187
BrandEPCOS
R 27.825
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. 167-8392
Mfr. Part No.B66325G0000X187
BrandEPCOS
R 27.434
Each (In a Box of 208)
units
E 42 - 42 x 21.2 x 15.2mm 3950nH N87 15.2mm 42mm 21.2mm - - - - - -
RS stock no. 213-4010
Mfr. Part No.B66365G0000X127
BrandEPCOS
R 47.265
Each (In a Pack of 2)
units
ETD 44 - 43.8 x 22.5 x 15.2mm 3300nH N27 15.2mm 43.8mm 22.5mm - - - - - -
RS stock no. 167-8326
Mfr. Part No.B66365G0000X127
BrandEPCOS
R 30.321
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. 647-9317
Mfr. Part No.B66325G0000X187
BrandEPCOS
R 48.21
Each (In a Pack of 2)
units
E 42 - 42 x 21.2 x 15.2mm 3950nH N87 15.2mm 42mm 21.2mm - - - - - -
RS stock no. 647-9446
Mfr. Part No.B66367G0500X187
BrandEPCOS
R 65.10
Each (In a Pack of 2)
units
ETD 49 SMPS Transformer 48.5 x 16.7 x 24.9mm 525nH N87 24.9mm 48.5mm 16.7mm - - - - - -
RS stock no. 167-8334
Mfr. Part No.B66367G0500X187
BrandEPCOS
R 39.892
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. 647-9424
Mfr. Part No.B66365G0500X187
BrandEPCOS
R 49.74
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. 167-8319
Mfr. Part No.B66365G0500X187
BrandEPCOS
R 31.554
Each (In a Box of 144)
units
ETD 49 SMPS Transformers 43.8 x 22.5 x 15.2mm 438nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS stock no. 125-3377
Mfr. Part No.B65807J0000R097
BrandEPCOS
R 33.102
Each (In a Pack of 5)
units
Ferrite Core Power Transformers 17.9 x 14.7 x 12.5mm 2400nH N97 12.5mm 17.9mm 14.7mm - - - - - IEC 62317-4
RS stock no. 647-9430
Mfr. Part No.B66365G0000X187
BrandEPCOS
R 51.96
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. 167-8380
Mfr. Part No.B66365G0000X187
BrandEPCOS
R 33.603
Each (In a Box of 144)
units
ETD 44 - 43.8 x 22.5 x 15.2mm 3500nH N87 15.2mm 43.8mm 22.5mm - - - - - -
RS stock no. 170-1428
Mfr. Part No.B65807J0000R097
BrandEPCOS
R 14.10
Each (On a Reel of 500)
units
Ferrite Core Power Transformers 17.9 x 14.7 x 12.5mm 2400nH N97 12.5mm 17.9mm 14.7mm - - - - - IEC 62317-4