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. 840-7507
Mfr. Part No.FS-1ETD-4916-02
BrandBlock
$11.98
Each
units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 162-0164
Mfr. Part No.B66339G0000X127
BrandEPCOS
$1.65
Each (In a Box of 208)
units
EC 41 - 40.6 x 19.65 x 11.9mm 2700nH N27 11.9mm 40.6mm 19.65mm - - - - - -
RS Stock No. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
$3.213
Each
units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS Stock No. 170-7513
Mfr. Part No.FS-1ETD-4916-02
BrandBlock
$9.375
Each (In a Box of 60)
units
ETD 49 Choke Converter Topologies, Transmitter 49 x 16 x 25mm 3800nH N87 25mm 49mm 16mm - - - - - -
RS Stock No. 167-8343
Mfr. Part No.B65887E0000R087
BrandEPCOS
$7.66
Each
units
RM 14 - 42.2 x 34.8 x 30.2mm 6000nH N87 30.2mm 42.2mm 34.8mm - - - - - -
RS Stock No. 180-806
Mfr. Part No.B65684A0000R087
BrandEPCOS
$36.34
1 Pair
Pair(s)
PM 62/49 DC DC converter 76 x 64 x 55mm 9200nH N87 - 62mm 49mm - - - - - -
RS Stock No. 170-7464
Mfr. Part No.FS-1E-4215-00
BrandBlock
$5.512
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. 213-0579
Mfr. Part No.B66339G0000X127
BrandEPCOS
$2.97
Each (In a Pack of 2)
units
EC 41 - 40.6 x 19.65 x 11.9mm 2700nH N27 11.9mm 40.6mm 19.65mm - - - - - -
RS Stock No. 125-3398
Mfr. Part No.B65819J0000R097
BrandEPCOS
$4.52
Each (In a Pack of 5)
units
Ferrite Core Power Transformers 20.3 x 17.2 x 13.5mm 2700nH N97 13.5mm 20.3mm 17.2mm - - - - - IEC 62317-4
RS Stock No. 647-9373
Mfr. Part No.B66361G1000X187
BrandEPCOS
$2.31
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. 125-3690
Mfr. Part No.B66413U0160L187
BrandEPCOS
$0.702
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. 125-3683
Mfr. Part No.B66375G0000X187
BrandEPCOS
$12.60
Each
units
Ferrite Core Power Transformers 80 x 20.2 x 38.5mm 4500nH N87 38.5mm 80mm 20.2mm - - - - - -
RS Stock No. 125-3658
Mfr. Part No.B66319G0000X187
BrandEPCOS
$1.061
Each (In a Pack of 20)
units
Ferrite Core Power Transformers 30 x 7.3 x 15.2mm 1900nH N87 15.2mm 30mm 7.3mm - - - - - -
RS Stock No. 840-7169
Mfr. Part No.FS-1E-6527-00
BrandBlock
$14.43
Each
units
E 65 Transformers, Reactors 65 x 27.4 x 32.8mm 7900nH N87 32.8mm 65mm 27.4mm +210°C - - - - -
RS Stock No. 212-5016
Mfr. Part No.B65646A0250A027
BrandEPCOS
$25.41
Each
units
PM 50/39 Power Transformer - 250nH N27 - 50mm 39mm - - - - - -
RS Stock No. 840-7474
Mfr. Part No.FS-1E-6527-01
BrandBlock
$17.07
Each
units
E 65 Transformers, Reactors 65 x 27.4 x 32.8mm 7900nH N87 32.8mm 65mm 27.4mm +210°C - - - - -
RS Stock No. 125-3419
Mfr. Part No.B65877A0000R095
BrandEPCOS
$7.32
Each (In a Pack of 2)
units
Ferrite Core Power Transformers 26.5 x 19 x 12.37mm 5700nH N95 12.37mm 26.5mm 19mm - - - - - IEC 62317-13
RS Stock No. 162-0174
Mfr. Part No.B65811J0000R087
BrandEPCOS
$1.61
Each
units
RM - 23.2 x 19.7 x 16.5mm 3300nH N87 16.5mm 23.2mm 19.7mm - - - - - -
RS Stock No. 170-1570
Mfr. Part No.B66375G0000X187
BrandEPCOS
$8.56
Each (On a Reel of 40)
units
Ferrite Core Power Transformers 80 x 20.2 x 38.5mm 4500nH N87 38.5mm 80mm 20.2mm - - - - - -
RS Stock No. 180-783
Mfr. Part No.B65815E0000R087
BrandEPCOS
$6.44
1 Pair
Pair(s)
RM 12 - 37.6 x 29.8 x 24.6mm 6000nH N87 24.6mm 37.6mm 29.8mm - - - - - -
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