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. 647-9389
Mfr. Part No.B66371G0000X187
BrandEPCOS
$18.645
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. 167-8389
Mfr. Part No.B66371G0000X187
BrandEPCOS
$12.089
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. 162-0165
Mfr. Part No.B65646A0000R027
BrandEPCOS
$18.986
Each (In a Box of 30)
units
PM 50/39 - 65 x 52 x 45mm 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 647-9367
Mfr. Part No.B66371G0000X127
BrandEPCOS
$14.49
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
$10.655
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. 212-5000
Mfr. Part No.B65646A0000R027
BrandEPCOS
$27.95
Each
units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 170-1402
Mfr. Part No.B65651T0400A048
BrandEPCOS
$3.57
Each (On a Reel of 500)
units
Ferrite Core Resonant Circuit Inductors - 400nH N48 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
$4.65
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. 167-8291
Mfr. Part No.B65815E0000R087
BrandEPCOS
$3.949
Each
units
RM 12 - 37.6 x 29.8 x 24.6mm 6000nH N87 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 167-8326
Mfr. Part No.B66365G0000X127
BrandEPCOS
$2.189
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. 125-3378
Mfr. Part No.B65807J0000Y038
BrandEPCOS
$4.654
Each (In a Pack of 5)
units
Ferrite Core Broadband Transformers 17.9 x 14.7 x 12.5mm 8600nH T38 12.5mm 17.9mm 14.7mm - - - - - IEC 62317-4
RS Stock No. 125-3349
Mfr. Part No.B65651T0400A048
BrandEPCOS
$6.71
Each (In a Pack of 2)
units
Ferrite Core Resonant Circuit Inductors - 400nH N48 10.6mm - 18.4mm - - - - - IEC 60133
RS Stock No. 167-0350
Mfr. Part No.B66417U0160K187
BrandEPCOS
$0.455
Each (In a Box of 1260)
units
EFD 20 DC DC converter 20 x 10 x 6.65mm 160nH N87 6.65mm 20mm 10mm - - - - - -
RS Stock No. 647-9604
Mfr. Part No.B66417U0160K187
BrandEPCOS
$1.037
Each (In a Pack of 10)
units
EFD 20 DC DC converter 20 x 10 x 6.65mm 160nH N87 6.65mm 20mm 10mm - - - - - -
RS Stock No. 170-1429
Mfr. Part No.B65807J0000Y038
BrandEPCOS
$2.33
Each (On a Reel of 500)
units
Ferrite Core Broadband Transformers 17.9 x 14.7 x 12.5mm 8600nH T38 12.5mm 17.9mm 14.7mm - - - - - IEC 62317-4
RS Stock No. 180-783
Mfr. Part No.B65815E0000R087
BrandEPCOS
$7.08
1 Pair
Pair(s)
RM 12 - 37.6 x 29.8 x 24.6mm 6000nH N87 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 213-4010
Mfr. Part No.B66365G0000X127
BrandEPCOS
$3.985
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. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
$2.72
Each
units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS Stock No. 170-1592
Mfr. Part No.B66506G0000X197
BrandEPCOS
$2.42
Each (On a Reel of 288)
units
Ferrite Core Power Transformers 30 x 20 x 8mm 4500nH N97 8mm 30mm 20mm - - - - - IEC 62317-9
RS Stock No. 212-6659
Mfr. Part No.B65815E1000J041
BrandEPCOS
$8.12
Each
units
RM 12 - 37.6 x 29.8 x 24.6mm 1000nH N41 24.6mm 37.6mm 29.8mm - - - - - -