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. 167-8333
Mfr. Part No.B64290L0082X830
BrandEPCOS
SGD7.713
Each (In a Box of 40)
units
Toroid Core 50 (Dia.) x 30mm General Electronics - N30 51.8mm 30mm 28.5mm 51.8mm - - - - -
RS Stock No. 212-0881
Mfr. Part No.B64290L0082X830
BrandEPCOS
SGD14.58
Each
units
Toroid Core 50 (Dia.) x 20mm General Electronics - N30 51.8mm 20mm 28.5mm 51.8mm - - - - -
RS Stock No. 467-3163
Mfr. Part No.2673000501
BrandFair-Rite
SGD0.089
Each (In a Pack of 50)
units
Bead 2 x 1.05 x 1.65mm Suppression Components - 73 Material 2mm 1.65mm 1.05mm 2mm - - - - -
RS Stock No. 125-3326
Mfr. Part No.B64290P0037X038
BrandEPCOS
SGD0.451
Each (In a Pack of 50)
units
Toroid Core 6.31 x 3.81 x 2.51mm Automotive Electronics, EMC Components, General Electronics - T38 - 2.51mm 3.81mm 6.31mm - - - - -
RS Stock No. 644-1665
Mfr. Part No.HF70T16X8X12
BrandTDK
SGD0.446
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 16 x 12 x 8mm Round Cable - HF70 16mm 8mm 12mm 16mm - - - - -
RS Stock No. 170-1381
Mfr. Part No.B64290P0037X038
BrandEPCOS
SGD0.301
Each (On a Reel of 4000)
units
Toroid Core 6.5 x 3.63 x 2.67mm Automotive Electronics, EMC Components, General Electronics - T38 - 2.51mm 3.81mm 6.31mm - - - - -
RS Stock No. 172-9944
Mfr. Part No.2673000501
BrandFair-Rite
SGD0.105
Each (In a Box of 10000)
units
Bead 2 x 1.05 x 1.65mm Suppression Components - 73 Material 2mm 1.65mm 1.05mm 2mm - - - - -
RS Stock No. 788-0226
Mfr. Part No.74270191
SGD10.59
Each
units
Toroid Core 61 x 35.5 x 20mm EMI Suppression - 4 W 620 20mm 20mm 35.5mm 61mm - - - - -
RS Stock No. 163-4558
Mfr. Part No.74270191
SGD9.623
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. 261-8940
Mfr. Part No.TR 25 15 12
BrandRichco
SGD5.48
Each
units
Toroid Core 25.2 x 15.1 x 12mm - - Ferrite - 12mm 15.1mm 25.2mm - - - - -
RS Stock No. 124-1545
Mfr. Part No.7427010
SGD1.606
Each (In a Pack of 10)
units
Toroid Core 16.5 x 8 x 13mm General Electronics - 4 W 620 16.5mm 13mm 8mm 16.5mm - - - - -
RS Stock No. 644-1148
Mfr. Part No.HF70BB3.5X3X1.3
BrandTDK
SGD0.202
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. 644-1609
Mfr. Part No.HF70T10X3X6
BrandTDK
SGD0.243
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 10 x 6 x 3mm Round Cable - HF70 10mm 3mm 6mm 10mm - - - - -
RS Stock No. 124-1851
Mfr. Part No.7427011
SGD1.565
Each (In a Pack of 10)
units
EMI Suppression Toroidal Ferrite 16.5 x 8 x 16mm Coaxial Cable, Multiconductor Wire, Wires, Wire-Wrapping Cable - 4 W 620 - 16mm 8mm 16.5mm - - - - -
RS Stock No. 172-9945
Mfr. Part No.2643001301
BrandFair-Rite
SGD0.068
Each (In a Box of 6000)
units
Bead 3.55 x 1.65 x 5.95mm Suppression Components - 43 Material 3.55mm 5.95mm 1.65mm 3.55mm - - - - -
RS Stock No. 467-2693
Mfr. Part No.2643375002
BrandFair-Rite
SGD0.409
Each (In a Pack of 25)
units
Bead 9.5 x 4.5 x 14.5mm Suppression Components - 43 Material 9.5mm 14.5mm 4.5mm 9.5mm - - - - -
RS Stock No. 172-9973
Mfr. Part No.2643375002
BrandFair-Rite
SGD0.382
Each (In a Box of 75)
units
Bead 9.5 x 4.5 x 14.5mm Suppression Components - 43 Material 9.5mm 14.5mm 4.5mm 9.5mm - - - - -
RS Stock No. 644-1306
Mfr. Part No.HF70BB9.5X10.4X4.9
BrandTDK
SGD0.606
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. 257-4418
Mfr. Part No.RT165-082-160-K5B
BrandRichco
SGD1.838
Each (In a Pack of 5)
units
Toroid Core 16.5 x 8 x 16mm Multi-Turn Suppression Core - K5B 16.5mm 16mm 8.2mm 16.5mm - - - - -
RS Stock No. 124-1549
Mfr. Part No.74270043
SGD1.724
Each (In a Pack of 5)
units
EMI Suppression Axial Ferrite Bead 15.5 x 7.3 x 28.5mm Coaxial Cable, Multiconductor Wire, Wires, Wire-Wrapping Cable - 3 W 800 - 28.5mm 7.3mm 15.5mm - - - - -