Ferrite Rings

Ferrite rings are toroidal (doughnut) shaped, or cylindrical shaped pieces of ferrite (a ceramic compound).What do they do?Ferrite rings help to protect against EMI (electromagnetic interference) and RFI (radio frequency interference). They prevent interference moving to a device or from a device.How do they work?Ferrite rings can suppress noise without grounding. Ferrites are able to attract magnetic flux. When a cable is passed through the ring, the magnetic fields created by the cable are concentrated within the ferrite ring. This magnetic energy is converted to heat and the ferrite dissipates this by magnetic loss.How are they used?Ferrite rings can often be seen with cables threaded through them. They are common place in electronics to help with noise suppression. The cable can also be wrapped about the ferrite ring numerous times. Ferrite rings can be incorporated into broadband transformers, pulse transformers and common mode chokes.

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Description Price Type Dimensions Application Impedance Material Diameter Height Inner Diameter Outer Diameter Outer Dimensions Outer Height Series Aperture Diameter Number of Apertures
RS Stock No. 163-4549
Mfr. Part No.7427013
MYR6.282
Each (In a Tray of 50)
units
Toroid Core 28 x 16 x 13mm EMI Suppression - 3 W 800 13mm 13mm 16mm 28mm - - - - -
RS Stock No. 644-1306
Mfr. Part No.HF70BB9.5X10.4X4.9
BrandTDK
MYR2.371
Each (In a Pack of 10)
units
Bead 9.5 x 4 x 10.4mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 9.52mm 10.4mm 4mm 9.5mm - - - - -
RS Stock No. 644-1463
Mfr. Part No.HF70RH16X28X9
BrandTDK
MYR8.114
Each (In a Pack of 5)
units
Cylindrical Core 16 x 9 x 28mm EMI Suppression, Round Cable - HF70 16mm 28mm 9mm 16mm - - - - -
RS Stock No. 167-8376
Mfr. Part No.B64290L0618X035
BrandEPCOS
MYR3.092
Each (In a Box of 500)
units
Ferrite Core 25.3 (Dia.) x 14.8 x 10mm General Electronics - T35 25.3mm 10mm 14.8mm 25.3mm - - - - -
RS Stock No. 167-8377
Mfr. Part No.B64290L0632X035
BrandEPCOS
MYR3.141
Each (In a Box of 1000)
units
Toroid Core 21.2 (Dia.) x 8.1mm General Electronics - T35 - 8.1mm 8.95mm 21.2mm - - - - -
RS Stock No. 212-0910
Mfr. Part No.B64290L0618X035
BrandEPCOS
MYR4.93
Each (In a Pack of 5)
units
Ferrite Core 25.3 (Dia.) x 14.8 x 10mm - - T35 25.3mm 10mm 14.8mm 25.3mm - - - - -
RS Stock No. 212-0948
Mfr. Part No.B64290L0632X035
BrandEPCOS
MYR6.132
Each (In a Pack of 5)
units
Toroid Core 21.2 (Dia.) x 8.1mm General Electronics - T35 - 8.1mm 8.95mm 21.2mm - - - - -
RS Stock No. 327-5471
Mfr. Part No.74270115
MYR18.98
Each
units
Toroid Core 31.5 19 (Dia.) x 16mm General Electronics - 3W800 31.5mm 16mm 19mm 31.5mm - - - - -
RS Stock No. 467-4554
Mfr. Part No.5978002701
BrandFair-Rite
MYR55.684
Each (In a Pack of 5)
units
Toroid Core 35.55 x 23 x 12.7mm Inductive Component - 78 Material 35.55mm 23mm 12.7mm 35.55mm - - - - -
RS Stock No. 788-0193
Mfr. Part No.7427013
MYR7.22
Each
units
Toroid Core 28 x 16 x 13mm EMI Suppression - 3 W 800 13mm 13mm 16mm 28mm - - - - -
RS Stock No. 163-3135
Mfr. Part No.74270115
MYR23.772
Each (In a Tray of 40)
units
Toroid Core 31.5 19 (Dia.) x 16mm General Electronics - 3W800 31.5mm 16mm 19mm 31.5mm - - - - -
RS Stock No. 163-4540
Mfr. Part No.74270097
MYR29.457
Each (In a Tray of 15)
units
Toroid Core 61 x 35.5 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 35.5mm 61mm - - - - -
RS Stock No. 371-7240
Mfr. Part No.HF70RH26X29X13
BrandTDK
MYR17.168
Each (In a Pack of 10)
units
Cylindrical Core 26 x 13 x 29mm EMI Suppression - HF70 26mm 29mm 13mm 26mm - - - - -
RS Stock No. 644-1249
Mfr. Part No.HF70BB5X5X2
BrandTDK
MYR0.701
Each (In a Pack of 10)
units
Bead 5 x 2 x 5mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 5mm 5mm 2mm 5mm - - - - -
RS Stock No. 467-4138
Mfr. Part No.5943000601
BrandFair-Rite
MYR2.995
Each (In a Pack of 10)
units
Toroid Core 21 (Dia.) x 6.35mm Inductive Component - 43 Material 21mm 6.35mm 13.2mm 21mm - - - - -
RS Stock No. 371-7234
Mfr. Part No.HF70RH17.4X28.57X9.5
BrandTDK
MYR10.686
Each (In a Pack of 10)
units
Round Cable Core 17.4 x 9 x 28.57mm Round Cable - HF70 17.4mm 28.57mm 9mm 17.4mm - - - - -
RS Stock No. 788-0143
Mfr. Part No.74270097
MYR30.54
Each
units
Toroid Core 61 x 35.5 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 35.5mm 61mm - - - - -
RS Stock No. 163-4550
Mfr. Part No.74270151
MYR16.69
Each (In a Tray of 63)
units
Toroid Core 34.6 x 20.8 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 20.8mm 34.6mm - - - - -
RS Stock No. 260-6739
Mfr. Part No.7427015
MYR14.01
Each
units
Toroid Core 40.6 27.4 (Dia.) x 15mm General Electronics - 4W620 40.6mm 15mm 27.4mm 40.6mm - - - - -
RS Stock No. 466-9748
Mfr. Part No.2631102002
BrandFair-Rite
MYR13.15
Each
units
Round Cable Core 25.9 x 12.8 x 28.6mm Suppression Components - 31 Material 25.9mm 28.6mm 12.8mm 25.9mm - - - - -