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 Inner Dimensions Outer Height Series Aperture Diameter
RS Stock No. 467-4172
Mfr. Part No.5943003801
BrandFair-Rite
SGD11.15
Each
units
Toroid Core 61 (Dia.) x 12.7mm Inductive Component - 43 Material 61mm 12.7mm 35.55mm 61mm - - - - -
RS Stock No. 124-1536
Mfr. Part No.74270052
SGD1.186
Each (In a Pack of 5)
units
Axial Ferrite Bead 16 x 8 x 16mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 3 W 800 - 16mm 8mm 16mm - - - - -
RS Stock No. 261-8962
Mfr. Part No.TR 31 19 8
BrandRichco
SGD3.94
Each
units
Toroid Core 31.5 x 19.3 x 8mm - - Ferrite - 8mm 19.3mm 31.5mm - - - - -
RS Stock No. 124-1542
Mfr. Part No.74270031
SGD0.912
Each (In a Pack of 10)
units
EMI Suppression Axial Ferrite Bead 11.5 x 5 x 20.5mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 4 W 1500 - 20.5mm 5mm 11.5mm - - - - -
RS Stock No. 467-4267
Mfr. Part No.5961000601
BrandFair-Rite
SGD1.75
Each (In a Pack of 5)
units
Toroid Core 21 (Dia.) x 6.35mm Inductive Component - 61 Material 21mm 6.35mm 13.2mm 21mm - - - - -
RS Stock No. 167-8385
Mfr. Part No.B64290L0040X830
BrandEPCOS
SGD10.148
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
SGD15.08
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. 167-8299
Mfr. Part No.B64290L0022X830
BrandEPCOS
SGD3.473
Each (In a Box of 100)
units
Toroid Core 41.8 x 26.2 x 12.5mm - - Ferrite 41.8mm 12.5mm 26.2mm 41.8mm - - - - -
RS Stock No. 814-3385
Mfr. Part No.TX63/38/25-3E10
BrandFERROXCUBE
SGD28.82
Each
units
Ring Core 63.4 x 37.7 x 25.3mm Interference Suppression Coil, Pulse and Wide Band Transformers - 3E10 Material 63.4mm 25.3mm 37.7mm 63.4mm - - - - -
RS Stock No. 290-6219
Mfr. Part No.B64290L0022X830
BrandEPCOS
SGD5.00
Each
units
Toroid Core 41.8 x 26.2 x 12.5mm - - Ferrite 41.8mm 12.5mm 26.2mm 41.8mm - - - - -
RS Stock No. 212-0881
Mfr. Part No.B64290L0082X830
BrandEPCOS
SGD12.87
Each
units
Toroid Core 50 (Dia.) x 20mm General Electronics - N30 51.8mm 20mm 28.5mm 51.8mm - - - - -
RS Stock No. 167-8333
Mfr. Part No.B64290L0082X830
BrandEPCOS
SGD8.76
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. 644-1160
Mfr. Part No.HF70BB3.5X5X0.8
BrandTDK
SGD0.178
Each (In a Pack of 10)
units
Bead 3.5 x 0.8 x 5mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 5mm 0.8mm 3.5mm - - - - -
RS Stock No. 125-3326
Mfr. Part No.B64290P0037X038
BrandEPCOS
SGD0.356
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. 124-1545
Mfr. Part No.7427010
SGD1.409
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. 170-1381
Mfr. Part No.B64290P0037X038
BrandEPCOS
SGD0.303
Each (On a Reel of 4000)
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. 163-4558
Mfr. Part No.74270191
SGD9.91
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. 467-3163
Mfr. Part No.2673000501
BrandFair-Rite
SGD0.10
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. 644-1665
Mfr. Part No.HF70T16X8X12
BrandTDK
SGD0.307
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. 644-1148
Mfr. Part No.HF70BB3.5X3X1.3
BrandTDK
SGD0.146
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 - - - - -
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Description:
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