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. 167-8396
Mfr. Part No.B66395G0000X187
BrandEPCOS
PHP137.55
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. 647-9480
Mfr. Part No.B66395G0000X187
BrandEPCOS
PHP218.93
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. 647-9519
Mfr. Part No.B66397G0000X187
BrandEPCOS
PHP414.75
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. 167-0378
Mfr. Part No.B67345B0001X087
BrandEPCOS
PHP2,023.35
Each (In a Box of 8)
units
U 93/104/30 Power transformer 93 x 76 x 30mm 5700nH N87 30mm 93mm 76mm - - - - - -
RS Stock No. 170-7464
Mfr. Part No.FS-1E-4215-00
BrandBlock
PHP181.30
Each (In a Box of 10)
units
E 42 Reactors, Transformers 42 x 15.2 x 21.2mm 3950nH N87 21.2mm 42mm 15.2mm +210°C - - - - -
RS Stock No. 647-9648
Mfr. Part No.B67345B0001X087
BrandEPCOS
PHP2,023.35
Each
units
U 93/104/30 Power transformer 93 x 76 x 30mm 5700nH N87 30mm 93mm 76mm - - - - - -
RS Stock No. 840-7159
Mfr. Part No.FS-1E-4215-00
BrandBlock
PHP154.08
Each
units
E 42 Transformers, Reactors 42 x 15.2 x 21.2mm 3950nH N87 21.2mm 42mm 15.2mm +210°C - - - - -
RS Stock No. 167-8304
Mfr. Part No.B66397G0000X187
BrandEPCOS
PHP268.80
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. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
PHP105.681
Each
units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS Stock No. 125-3690
Mfr. Part No.B66413U0160L187
BrandEPCOS
PHP24.10
Each (In a Pack of 20)
units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 160nH N87 7.5mm 15mm 4.85mm - - - - - IEC 61185
RS Stock No. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
PHP140.18
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. 647-9446
Mfr. Part No.B66367G0500X187
BrandEPCOS
PHP161.06
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
PHP89.069
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. 170-1578
Mfr. Part No.B66413U0160L187
BrandEPCOS
PHP11.76
Each (On a Reel of 1920)
units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 160nH N87 7.5mm 15mm 4.85mm - - - - - IEC 61185
RS Stock No. 167-8242
Mfr. Part No.B65815E0250A041
BrandEPCOS
PHP147.00
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
PHP253.58
Each
units
RM 12 - 37.6 x 29.8 x 24.6mm 250nH N41 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 125-3642
Mfr. Part No.B66305G0040X127
BrandEPCOS
PHP16.17
Each (In a Pack of 50)
units
Ferrite Core Miniature Transformers, Power Transformers 12.6 x 3.7 x 6.5mm 250nH N27 6.5mm 12.6mm 3.7mm - - - - - IEC 61246
RS Stock No. 125-3654
Mfr. Part No.B66317G0000X187
BrandEPCOS
PHP25.618
Each (In a Pack of 20)
units
Ferrite Core Power Transformers 25 x 7.5 x 12.8mm 1850nH N87 12.8mm 25mm 7.5mm - - - - - IEC 61246
RS Stock No. 170-1441
Mfr. Part No.B65813J0000R097
BrandEPCOS
PHP134.334
Each (On a Reel of 200)
units
Ferrite Core Power Transformers 28.5 x 24.7 x 18.7mm 4200nH N97 18.7mm 28.5mm 24.7mm - - - - - IEC 62317-4
RS Stock No. 125-3391
Mfr. Part No.B65813J0000R097
BrandEPCOS
PHP182.70
Each (In a Pack of 5)
units
Ferrite Core Power Transformers 28.5 x 24.7 x 18.7mm 4200nH N97 18.7mm 28.5mm 24.7mm - - - - - IEC 62317-4
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