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. 167-8304
Mfr. Part No.B66397G0000X187
BrandEPCOS
£5.067
Each (In a Box of 40)
Units
ETD 59 SMPS transformer 59.8 x 31.2 x 22.1mm 5300nH N87 22.1mm 59.8mm 31.2mm - CRL - - - -
RS Stock No. 647-9519
Mfr. Part No.B66397G0000X187
BrandEPCOS
£5.99
Each (In a Pack of 2)
Units
ETD 59 SMPS transformer 59.8 x 31.2 x 22.1mm 5300nH N87 22.1mm 59.8mm 31.2mm - - - - - -
RS Stock No. 647-9389
Mfr. Part No.B66371G0000X187
BrandEPCOS
£7.90
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
£5.38
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. 647-9395
Mfr. Part No.B66361G0000X187
BrandEPCOS
£0.86
Each (In a Pack of 2)
Units
ETD 11, ETD 17, ETD 34 SMPS Transformer 34 x 11.1 x 17.5mm 2600nH N87 17.5mm 34mm 11.1mm - - - - - -
RS Stock No. 162-0141
Mfr. Part No.B66361G0000X187
BrandEPCOS
£0.461
Each (In a Box of 300)
Units
ETD 11, ETD 17, ETD 34 SMPS Transformer 34 x 11.1 x 17.5mm 2600nH N87 17.5mm 34mm 11.1mm - - - - - -
RS Stock No. 167-8320
Mfr. Part No.B67345B0001X027
BrandEPCOS
£22.403
Each (In a Box of 8)
Units
U 93 Power transformer 93 x 76 x 30mm 5400nH N27 30mm 93mm 76mm - - - - - -
RS Stock No. 213-4470
Mfr. Part No.B67345B0001X027
BrandEPCOS
£24.64
Each
Units
U 93 Power transformer 93 x 76 x 30mm 5400nH N27 30mm 93mm 76mm - - - - - -
RS Stock No. 180-115
Mfr. Part No.B65807J0000R087
BrandEPCOS
£1.49
1 Pair
Pair(s)
RM 6 Transformer 17.9 x 14.7 x 12.5mm 2400nH N87 12.5mm 17.9mm 14.7mm - - - - - -
RS Stock No. 167-8248
Mfr. Part No.B65807J0000R087
BrandEPCOS
£0.717
Each
Units
RM 6 Transformer 17.9 x 14.7 x 12.5mm 2400nH N87 12.5mm 17.9mm 14.7mm - - - - - -
RS Stock No. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
£1.72
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. 167-8288
Mfr. Part No.B65813J0000R087
BrandEPCOS
£0.993
Each
Units
RM 10 Transformer 28.5 x 24.7 x 18.7mm 4200nH N87 18.7mm 28.5mm 24.7mm - - - - - -
RS Stock No. 180-812
Mfr. Part No.B65811J0000R087
BrandEPCOS
£1.25
1 Pair
Pair(s)
RM - 23.2 x 19.7 x 16.5mm 3300nH N87 16.5mm 23.2mm 19.7mm - - - - - -
RS Stock No. 162-0174
Mfr. Part No.B65811J0000R087
BrandEPCOS
£0.725
Each
Units
RM - 23.2 x 19.7 x 16.5mm 3300nH N87 16.5mm 23.2mm 19.7mm - - - - - -
RS Stock No. 167-8372
Mfr. Part No.B66387G0000X187
BrandEPCOS
£3.332
Each (In a Box of 36)
Units
E 65 - 65 x 32.8 x 27.4mm 7900nH N87 27.4mm 65mm 32.8mm - - - - - -
RS Stock No. 647-9345
Mfr. Part No.B66387G0000X187
BrandEPCOS
£4.90
Each (In a Pack of 2)
Units
E 65 - 65 x 32.8 x 27.4mm 7900nH N87 27.4mm 65mm 32.8mm - - - - - -
RS Stock No. 647-9317
Mfr. Part No.B66325G0000X187
BrandEPCOS
£0.71
Each (In a Pack of 2)
Units
E 42 - 42 x 21.2 x 15.2mm 3950nH N87 15.2mm 42mm 21.2mm - - - - - -
RS Stock No. 167-8392
Mfr. Part No.B66325G0000X187
BrandEPCOS
£0.67
Each (In a Box of 208)
Units
E 42 - 42 x 21.2 x 15.2mm 3950nH N87 15.2mm 42mm 21.2mm - - - - - -
RS Stock No. 167-8303
Mfr. Part No.B65686A0315A027
BrandEPCOS
£30.194
Each
Units
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 315nH N27 59mm 74mm - - - - - - -
RS Stock No. 180-834
Mfr. Part No.B65686A0315A027
BrandEPCOS
£33.21
1 Pair
Pair(s)
PM 74/59 Energy storing choke 85.5 x 75 x 65mm 315nH N27 59mm 74mm - - - - - - -
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