Transformer 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 Core Size For Use With Dimensions AL Rating Material Depth Length Width Maximum Temperature Series
RS Stock No. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
kr 229,319
Each (In a Box of 8)
Units
I 93/104/30 Power Transformers 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - -
RS Stock No. 647-9660
Mfr. Part No.B67345B0002X087
BrandEPCOS
kr 253,09
Each
Units
I 93/104/30 Power Transformers 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - -
RS Stock No. 647-9648
Mfr. Part No.B67345B0001X087
BrandEPCOS
kr 389,96
Each
Units
U 93/104/30 Power Transformers 93 x 76 x 30mm 5700nH N87 30mm 93mm 76mm - -
RS Stock No. 167-0378
Mfr. Part No.B67345B0001X087
BrandEPCOS
kr 348,551
Each (In a Box of 8)
Units
U 93/104/30 Power Transformers 93 x 76 x 30mm 5700nH N87 30mm 93mm 76mm - -
RS Stock No. 170-1430
Mfr. Part No.B65807N0250A048
BrandEPCOS
kr 14,441
Each (On a Reel of 500)
Units
RM 6 Resonant Circuit Inductors, Transformers 17.9 x 14.7 x 12.5mm 250nH N48 12.5mm 17.9mm 14.7mm - -
RS Stock No. 125-3379
Mfr. Part No.B65807N0250A048
BrandEPCOS
kr 29,962
Each (In a Pack of 5)
Units
RM 6 Resonant Circuit Inductors, Transformers 17.9 x 14.7 x 12.5mm 250nH N48 12.5mm 17.9mm 14.7mm - -
RS Stock No. 213-4010
Mfr. Part No.B66365G0000X127
BrandEPCOS
kr 25,93
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. 170-1575
Mfr. Part No.B66413G0000X187
BrandEPCOS
kr 2,901
Each (On a Reel of 1920)
Units
EFD 15/8/5 DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 780nH N87 7.5mm 15mm 4.85mm - -
RS Stock No. 167-8318
Mfr. Part No.B65646A0250A027
BrandEPCOS
kr 139,991
Each (In a Box of 30)
Units
PM 39/50 Power Transformers 65 x 52 x 45mm 250nH N27 - 50mm 39mm - -
RS Stock No. 125-3327
Mfr. Part No.B65517D0063A033
BrandEPCOS
kr 6,27
Each (In a Pack of 5)
Units
P 9/5 Resonant Circuit Inductors - 63nH M33 5.4mm - 9.3mm - -
RS Stock No. 170-1413
Mfr. Part No.B65733A0000R027
BrandEPCOS
kr 1 839,715
Each (On a Reel of 2)
Units
PM 114/93 Power Transformers - 16000nH N27 93mm - 114mm - -
RS Stock No. 170-1577
Mfr. Part No.B66413U0100K187
BrandEPCOS
kr 2,254
Each (On a Reel of 1920)
Units
EFD 15/8/5 DC/DC Converter, Flat Transformers, Power Transformers 15 x 4.85 x 7.5mm 100nH N87 7.5mm 15mm 4.85mm - -
RS Stock No. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
kr 16,412
Each
Units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - -
RS Stock No. 170-1411
Mfr. Part No.B65713A0000R087
BrandEPCOS
kr 684,898
Each (On a Reel of 4)
Units
PM 87/70 Energy Storage Chokes, Power Transformers - 12000nH N87 70mm - 87mm - -
RS Stock No. 170-1570
Mfr. Part No.B66375G0000X187
BrandEPCOS
kr 64,31
Each (On a Reel of 40)
Units
E 80/38/20 Power Transformers 80 x 20.2 x 38.5mm 4500nH N87 38.5mm 80mm 20.2mm - -
RS Stock No. 125-3673
Mfr. Part No.B66363G0000X187
BrandEPCOS
kr 33,484
Each (In a Pack of 5)
Units
ETD 39/20/13 Power Transformers, SMPS Transformers 38.9 x 12.8 x 20mm 2700nH N87 20mm 38.9mm 12.8mm - -
RS Stock No. 172-4827
Mfr. Part No.FS-1E-3209-05
BrandBlock
kr 15,501
Each (In a Box of 80)
Units
E 32/16/11 Reactors, Transformers 32 x 9.5 x 16.4mm 2300nH N87 16.4mm 32mm 9.5mm +210°C -
RS Stock No. 125-3656
Mfr. Part No.B66317G0500X187
BrandEPCOS
kr 9,719
Each (In a Pack of 20)
Units
E 25/13/7 Power Transformers 25 x 7.5 x 12.8mm 151nH N87 12.8mm 25mm 7.5mm - -
RS Stock No. 169-1879
Mfr. Part No.PLA51LA32
BrandVishay
kr 1 183,913
Each (In a Box of 6)
Units
- High Power Density DC/DC Converter 70 x 53 x 22mm 128µH - 22mm 70mm 53mm +180°C PLA51
RS Stock No. 125-3653
Mfr. Part No.B66317G0000X127
BrandEPCOS
kr 6,219
Each (In a Pack of 20)
Units
E 25/13/7 Power Transformers 25 x 7.5 x 12.8mm 1750nH N27 12.8mm 25mm 7.5mm - -