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. 212-5000
Mfr. Part No.B65646A0000R027
BrandEPCOS
$25.41
Each
units
PM 50/39 - - 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 170-7540
Mfr. Part No.FS-1ETD-4415-10
BrandBlock
$7.339
Each (In a Box of 80)
units
ETD 44 Choke Converter Topologies, Transmitter 44 x 15 x 22mm 3500nH N87 22mm 44mm 15mm - - - - - -
RS Stock No. 162-0165
Mfr. Part No.B65646A0000R027
BrandEPCOS
$17.26
Each (In a Box of 30)
units
PM 50/39 - 65 x 52 x 45mm 7400nH N27 39mm 50mm - - - - - - -
RS Stock No. 213-4470
Mfr. Part No.B67345B0001X027
BrandEPCOS
$64.84
Each
units
U 93 Power transformer 93 x 76 x 30mm 5400nH N27 30mm 93mm 76mm - - - - - -
RS Stock No. 167-0378
Mfr. Part No.B67345B0001X087
BrandEPCOS
$58.92
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. 647-9339
Mfr. Part No.B66329G0000X187
BrandEPCOS
$4.03
Each (In a Pack of 2)
units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 125-3696
Mfr. Part No.B66421G0000X197
BrandEPCOS
$1.10
Each (In a Pack of 20)
units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 25 x 9.1 x 12.5mm 2100nH N97 12.5mm 25mm 9.1mm - - - - - -
RS Stock No. 162-0141
Mfr. Part No.B66361G0000X187
BrandEPCOS
$0.923
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. 647-9648
Mfr. Part No.B67345B0001X087
BrandEPCOS
$58.92
Each
units
U 93/104/30 Power transformer 93 x 76 x 30mm 5700nH N87 30mm 93mm 76mm - - - - - -
RS Stock No. 170-1585
Mfr. Part No.B66421G0000X197
BrandEPCOS
$0.595
Each (On a Reel of 650)
units
Ferrite Core DC/DC Converter, Flat Transformers, Power Transformers 25 x 9.1 x 12.5mm 2100nH N97 12.5mm 25mm 9.1mm - - - - - -
RS Stock No. 167-0350
Mfr. Part No.B66417U0160K187
BrandEPCOS
$0.414
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. 647-9395
Mfr. Part No.B66361G0000X187
BrandEPCOS
$1.79
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. 212-6772
Mfr. Part No.B65887E0160A041
BrandEPCOS
$14.13
Each
units
RM 14 - 42.2 x 34.8 x 30.2mm 160nH N41 30.2mm 42.2mm 34.8mm - - - - - -
RS Stock No. 162-0169
Mfr. Part No.B65887E0160A041
BrandEPCOS
$9.33
Each (In a Box of 60)
units
RM 14 - 42.2 x 34.8 x 30.2mm 160nH N41 30.2mm 42.2mm 34.8mm - - - - - -
RS Stock No. 167-8329
Mfr. Part No.B66329G0000X187
BrandEPCOS
$2.23
Each (In a Box of 120)
units
E 42 - 42 x 21.2 x 20mm 5200nH N87 20mm 42mm 21.2mm - - - - - -
RS Stock No. 647-9604
Mfr. Part No.B66417U0160K187
BrandEPCOS
$0.929
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. 180-799
Mfr. Part No.B65813J0000R087
BrandEPCOS
$4.16
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. 170-1449
Mfr. Part No.B65819J0000R097
BrandEPCOS
$2.392
Each (On a Reel of 250)
units
Ferrite Core Power Transformers 20.3 x 17.2 x 13.5mm 2700nH N97 13.5mm 20.3mm 17.2mm - - - - - IEC 62317-4
RS Stock No. 180-777
Mfr. Part No.B65887E0000R087
BrandEPCOS
$11.50
1 Pair
Pair(s)
RM 14 - 42.2 x 34.8 x 30.2mm 6000nH N87 30.2mm 42.2mm 34.8mm - - - - - -
RS Stock No. 167-8283
Mfr. Part No.B65684A0000R087
BrandEPCOS
$32.50
Each
units
PM 62/49 DC DC converter 76 x 64 x 55mm 9200nH N87 - 62mm 49mm - - - - - -
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