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. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
€1.152
Each
units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS Stock No. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
€1.94
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. 167-8329
Mfr. Part No.B66329G0000X187
BrandEPCOS
€1.262
Each (In a Box of 120)
units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 647-9660
Mfr. Part No.B67345B0002X087
BrandEPCOS
€20.25
Each
units
I 93/104/30 Power transformer 93 x 28 x 30mm 7900nH N87 30mm 93mm 28mm - - - - - -
RS Stock No. 180-828
Mfr. Part No.B65686A0000R087
BrandEPCOS
€48.45
1 Pair
Pair(s)
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N87 - 74mm 59mm - - - - - -
RS Stock No. 213-4470
Mfr. Part No.B67345B0001X027
BrandEPCOS
€27.84
Each
units
U 93 Power transformer 93 x 76 x 30mm 5400nH N27 30mm 93mm 76mm - - - - - -
RS Stock No. 647-9339
Mfr. Part No.B66329G0000X187
BrandEPCOS
€2.275
Each (In a Pack of 2)
units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 167-8316
Mfr. Part No.B65686A0000R027
BrandEPCOS
€25.866
Each (In a Box of 10)
units
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N27 59mm 74mm - - - - - - -
RS Stock No. 167-8320
Mfr. Part No.B67345B0001X027
BrandEPCOS
€25.315
Each (In a Box of 8)
units
U 93 Power transformer 93 x 76 x 30mm 5400nH N27 30mm 93mm 76mm - - - - - -
RS Stock No. 212-5094
Mfr. Part No.B65686A0000R027
BrandEPCOS
€26.30
Each
units
PM 74/59 Energy storing choke - 10000nH N27 59mm 74mm - - - - - - -
RS Stock No. 167-8302
Mfr. Part No.B65686A0000R087
BrandEPCOS
€40.254
Each
units
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 10000nH N87 - 74mm 59mm - - - - - -
RS Stock No. 167-0293
Mfr. Part No.B67345B0002X087
BrandEPCOS
€14.44
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. 170-1529
Mfr. Part No.B66307G0000X187
BrandEPCOS
€0.166
Each (In a Box of 2000)
units
Ferrite Core Common-Mode Chokes, Power Transformers 16 x 4.7 x 8.2mm 1000nH N87 8.2mm 16mm 4.7mm - - - - - IEC 61246
RS Stock No. 170-1548
Mfr. Part No.B66344G0000X187
BrandEPCOS
€3.57
Each (On a Reel of 100)
units
Ferrite Core Power Transformers 55 x 25 x 27.8mm 7300nH N87 27.8mm 55mm 25mm - - - - - -
RS Stock No. 162-0164
Mfr. Part No.B66339G0000X127
BrandEPCOS
€0.93
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. 170-1411
Mfr. Part No.B65713A0000R087
BrandEPCOS
€50.11
Each (On a Reel of 4)
units
Ferrite Core Energy Storage Chokes, Power Transformers - 12000nH N87 70mm - 87mm - - - - - IEC 61247
RS Stock No. 162-0174
Mfr. Part No.B65811J0000R087
BrandEPCOS
€0.954
Each
units
RM - 23.2 x 19.7 x 16.5mm 3300nH N87 16.5mm 23.2mm 19.7mm - - - - - -
RS Stock No. 167-8291
Mfr. Part No.B65815E0000R087
BrandEPCOS
€1.96
Each
units
RM 12 - 37.6 x 29.8 x 24.6mm 6000nH N87 24.6mm 37.6mm 29.8mm - - - - - -
RS Stock No. 170-1419
Mfr. Part No.B65805J0000Y038
BrandEPCOS
€0.802
Each (On a Reel of 500)
units
Ferrite Core Broadband Transformers 14.6 x 12.3 x 10.5mm 6700nH T38 10.5mm 14.6mm 12.3mm - - - - - IEC 62317-4
RS Stock No. 647-9424
Mfr. Part No.B66365G0500X187
BrandEPCOS
€2.17
Each (In a Pack of 2)
units
ETD 49 SMPS Transformers 43.8 x 22.5 x 15.2mm 438nH N87 15.2mm 43.8mm 22.5mm - - - - - -
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