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. 167-8385
Mfr. Part No.B64290L0040X830
BrandEPCOS
HK$55.034
Each (In a Box of 50)
units
Ferrite Core 60.1 x 39.2 x 18.8mm Broadband Transformers, Choke, Mixer, Pulse, Transformer - Ferrite N30 - 18.8mm 39.2mm 60.1mm - - - - -
RS Stock No. 212-0803
Mfr. Part No.B64290L0040X830
BrandEPCOS
HK$65.16
Each
units
Ferrite Core 60.1 x 39.2 x 18.8mm Broadband Transformers, Choke, Mixer, Pulse, Transformer - Ferrite N30 - 18.8mm 39.2mm 60.1mm - - - - -
RS Stock No. 811-9092
Mfr. Part No.ESD-R-47D-B
BrandKEMET
HK$90.89
Each
units
Toroid Core 51.5 x 25.5 x 17.5mm Consumer Electronics - Nickel Zinc 51.5mm 17.5mm 25.5mm 51.5mm - - - - -
RS Stock No. 169-6786
Mfr. Part No.ESD-R-47D-B
BrandKEMET
HK$68.03
Each (In a Box of 90)
units
Toroid Core 51.5 x 25.5 x 17.5mm Consumer Electronics - Nickel Zinc 51.5mm 17.5mm 25.5mm 51.5mm - - - - -
RS Stock No. 644-1766
Mfr. Part No.HF70T28X13X16
BrandTDK
HK$14.254
Each (In a Pack of 5)
units
EMI Suppression Toroid Core 28 x 16 x 13mm Round Cable - HF70 28mm 13mm 16mm 28mm - - - - -
RS Stock No. 644-1148
Mfr. Part No.HF70BB3.5X3X1.3
BrandTDK
HK$1.149
Each (In a Pack of 10)
units
Bead 3.5 x 1.3 x 3mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 3mm 1.3mm 3.5mm - - - - -
RS Stock No. 371-7212
Mfr. Part No.HF70RH14.3X28.6X6.35
BrandTDK
HK$6.149
Each (In a Pack of 10)
units
Cylindrical Core 14.3 x 6.35 x 28.6mm EMI Suppression - HF70 14.3mm - 6.35mm 14.3mm - - - - -
RS Stock No. 169-6787
Mfr. Part No.ESD-R-57
BrandKEMET
HK$99.256
Each (In a Box of 60)
units
Toroid Core 61 x 32.4 x 24mm Consumer Electronics - Manganese-Zinc - 24mm 32.4mm 61mm - - - - -
RS Stock No. 811-9102
Mfr. Part No.ESD-R-57
BrandKEMET
HK$122.51
Each
units
Toroid Core 61 x 32.4 x 24mm Consumer Electronics - Manganese-Zinc - 24mm 32.4mm 61mm - - - - -
RS Stock No. 644-1788
Mfr. Part No.HF70T31X13X19
BrandTDK
HK$13.356
Each (In a Pack of 5)
units
EMI Suppression Toroid Core 31 x 19 x 13mm Round Cable - HF70 31mm 13mm 19mm 31mm - - - - -
RS Stock No. 124-1849
Mfr. Part No.742701716
HK$8.168
Each (In a Pack of 10)
units
EMI Suppression Toroidal Ferrite 12.7 x 7.9 x 6.35mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 7 W 380 - 6.35mm 7.9mm 12.7mm - - - - -
RS Stock No. 163-4558
Mfr. Part No.74270191
HK$50.91
Each (In a Tray of 15)
units
Toroid Core 61 x 35.5 x 20mm EMI Suppression - 4 W 620 20mm 20mm 35.5mm 61mm - - - - -
RS Stock No. 788-0226
Mfr. Part No.74270191
HK$62.40
Each
units
Toroid Core 61 x 35.5 x 20mm EMI Suppression - 4 W 620 20mm 20mm 35.5mm 61mm - - - - -
RS Stock No. 169-6769
Mfr. Part No.ESD-R-12C
BrandKEMET
HK$1.72
Each (In a Box of 1400)
units
Toroid Core 11.8 x 7.3 x 15mm Consumer Electronics - Nickel Zinc - 15mm 7.3mm 11.8mm - - - - -
RS Stock No. 239-056
BrandRS PRO
HK$23.283
Each (In a Pack of 6)
units
Ferrite Core 15.64 x 6.99 x 28.57mm EMI Suppression - Ferrite, Nickel Zinc - 28.57mm 6.99mm 15.64mm - - - - -
RS Stock No. 124-1850
Mfr. Part No.74270117
HK$5.377
Each (In a Pack of 10)
units
EMI Suppression Toroidal Ferrite 14 x 10 x 8mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 3 W 800 - 8mm 10mm 14mm - - - - -
RS Stock No. 212-0976
Mfr. Part No.B64290L0659X830
BrandEPCOS
HK$45.12
Each
units
Toroid Core 41.8 (Dia.) x 17.2mm - - N30 41.8mm 17.02mm 22.5mm 41.8mm - - - - -
RS Stock No. 163-4540
Mfr. Part No.74270097
HK$56.497
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. 811-8957
Mfr. Part No.ESD-R-12C
BrandKEMET
HK$3.54
Each (In a Bag of 10)
units
Toroid Core 11.8 x 7.3 x 15mm Consumer Electronics - Nickel Zinc - 15mm 7.3mm 11.8mm - - - - -
RS Stock No. 167-8277
Mfr. Part No.B64290L0048X830
BrandEPCOS
HK$13.86
Each (In a Box of 100)
units
Toroid Core 35.5 (Dia.) x 13.6mm General Electronics - N30 35.5mm 13.6mm 19.2mm 35.5mm - - - - -