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. 170-7464
Mfr. Part No.FS-1E-4215-00
BrandBlock
MYR16.778
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. 840-7159
Mfr. Part No.FS-1E-4215-00
BrandBlock
MYR12.85
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. 167-8389
Mfr. Part No.B66371G0000X187
BrandEPCOS
MYR29.41
Each (In a Box of 30)
units
E 70 Transformer 70.5 x 32 x 33.2mm 9700nH N87 33.2mm 70.5mm 32mm - - - - - -
RS Stock No. 647-9389
Mfr. Part No.B66371G0000X187
BrandEPCOS
MYR42.365
Each (In a Pack of 2)
units
E 70 Transformer 70.5 x 32 x 33.2mm 9700nH N87 33.2mm 70.5mm 32mm - - - - - -
RS Stock No. 647-9367
Mfr. Part No.B66371G0000X127
BrandEPCOS
MYR36.055
Each (In a Pack of 2)
units
E 32, E 33, E 70 Transformer 70.5 x 32 x 33.2mm 8850nH N27 33.2mm 70.5mm 32mm - - - - - -
RS Stock No. 167-8386
Mfr. Part No.B66371G0000X127
BrandEPCOS
MYR26.041
Each (In a Box of 30)
units
E 32, E 33, E 70 Transformer 70.5 x 32 x 33.2mm 8850nH N27 33.2mm 70.5mm 32mm - - - - - -
RS Stock No. 483-3573
Mfr. Part No.B66361G0000X127
BrandEPCOS
MYR4.50
Each (In a Pack of 5)
units
ETD 34 - 34 x 11.1 x 17.5mm 2400nH N27 17.5mm 34mm 11.1mm - - - - - -
RS Stock No. 170-1593
Mfr. Part No.B67385P0000X187
BrandEPCOS
MYR81.23
Each (On a Reel of 8)
units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 167-8300
Mfr. Part No.B66361G0000X127
BrandEPCOS
MYR2.33
Each (In a Box of 300)
units
ETD 34 - 34 x 11.1 x 17.5mm 2400nH N27 17.5mm 34mm 11.1mm - - - - - -
RS Stock No. 125-3704
Mfr. Part No.B67385P0000X187
BrandEPCOS
MYR81.23
Each
units
Ferrite Core Power Transformers 126 x 20 x 91mm 3900nH N87 91mm 126mm 20mm - - - - - -
RS Stock No. 162-0164
Mfr. Part No.B66339G0000X127
BrandEPCOS
MYR4.399
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. 647-9660
Mfr. Part No.B67345B0002X087
BrandEPCOS
MYR81.23
Each
units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
RS Stock No. 213-0579
Mfr. Part No.B66339G0000X127
BrandEPCOS
MYR7.77
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. 213-4486
Mfr. Part No.B67345B0002X027
BrandEPCOS
MYR73.82
Each
units
I 93 Power transformer 93 x 28 x 30mm 7400nH N27 30mm 93mm 28mm - - - - - -
RS Stock No. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
MYR81.23
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. 167-8278
Mfr. Part No.B67345B0002X027
BrandEPCOS
MYR73.82
Each (In a Box of 8)
units
I 93 Power transformer 93 x 28 x 30mm 7400nH N27 30mm 93mm 28mm - - - - - -
RS Stock No. 167-0378
Mfr. Part No.B67345B0001X087
BrandEPCOS
MYR157.63
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. 167-8337
Mfr. Part No.B66367G0000X187
BrandEPCOS
MYR10.583
Each (In a Box of 120)
units
ETD 49 - 48.5 x 24.9 x 16.7mm 3800nH N87 16.7mm 48.5mm 24.9mm - - - - - -
RS Stock No. 647-9468
Mfr. Part No.B66367G0000X187
BrandEPCOS
MYR18.275
Each (In a Pack of 2)
units
ETD 49 - 48.5 x 24.9 x 16.7mm 3800nH N87 16.7mm 48.5mm 24.9mm - - - - - -
RS Stock No. 170-1402
Mfr. Part No.B65651T0400A048
BrandEPCOS
MYR14.526
Each (On a Reel of 500)
units
Ferrite Core Resonant Circuit Inductors - 400nH N48 10.6mm - 18.4mm - - - - - IEC 60133
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