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 Impedance at 25 MHz Openable Series
RS Stock No. 124-1552
Mfr. Part No.7427014
TWD128.40
Each (In a Pack of 5)
units
EMI Suppression Toroidal Ferrite 28 x 16 x 20mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 3 W 800 - 20mm 16mm 28mm - - - - -
RS Stock No. 125-3322
Mfr. Part No.B64290L0699X087
BrandEPCOS
TWD501.00
Each
units
Toroid Core 65.3 x 36 x 26.6mm Automotive Electronics, EMC Components, General Electronics - N87 - 26.6mm 36mm 65.3mm - - - - -
RS Stock No. 124-1537
Mfr. Part No.7427005
TWD38.30
Each (In a Pack of 10)
units
Ferrite Core 16 x 9 x 28mm General Electronics - 4 W 620 16mm 28mm 9mm 16mm - - - - -
RS Stock No. 170-1363
Mfr. Part No.B64290L0038X087
BrandEPCOS
TWD2.80
Each (On a Reel of 3000)
units
Toroid Core 10.8 x 5.25 x 4.75mm Automotive Electronics, EMC Components, General Electronics - N87 - 4.75mm 5.25mm 10.8mm - - - - -
RS Stock No. 163-4541
Mfr. Part No.74270110
TWD56.90
Each (In a Tray of 126)
units
Toroid Core 16 x 12 x 16mm EMI Suppression - 4 W 1500 16mm 16mm 12mm 16mm - - - - -
RS Stock No. 124-1541
Mfr. Part No.74270033
TWD21.40
Each (In a Pack of 20)
units
EMI Suppression Axial Ferrite Bead 9.5 x 4.75 x 9.5mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 3 W 800 - 9.5mm 4.75mm 9.5mm - - - - -
RS Stock No. 167-8277
Mfr. Part No.B64290L0048X830
BrandEPCOS
TWD55.10
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 - - - - -
RS Stock No. 170-1365
Mfr. Part No.B64290L0045X038
BrandEPCOS
TWD12.10
Each (In a Box of 2000)
units
Toroid Core 17.2 x 8.5 x 7.3mm Automotive Electronics, EMC Components, General Electronics - T38 - 7.3mm 8.5mm 17.2mm - - - - -
RS Stock No. 467-4138
Mfr. Part No.5943000601
BrandFair-Rite
TWD22.80
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. 171-0802
Mfr. Part No.TX63/38/25-3E12
BrandFERROXCUBE
TWD464.60
Each (On a Reel of 24)
units
Ring Core 63.4 x 37.7 x 25.3mm Interference Suppression Coil, Pulse and Wide Band Transformers - 3E12 Material 63.4mm 25.3mm 37.7mm 63.4mm - - - - -
RS Stock No. 124-1536
Mfr. Part No.74270052
TWD40.60
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. 212-0803
Mfr. Part No.B64290L0040X830
BrandEPCOS
TWD386.00
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. 169-6777
Mfr. Part No.ESD-R-19
BrandKEMET
TWD23.20
Each (In a Box of 480)
units
Toroid Core 19 x 9 x 11mm Consumer Electronics - Ferrite - 11mm 9mm 19mm - - - - -
RS Stock No. 172-9950
Mfr. Part No.2673000301
BrandFair-Rite
TWD3.30
Each (In a Box of 6000)
units
EMI Suppression 3.5 x 1.3 x 6mm EMI Suppression - 73 Material 3.5mm 6mm 1.3mm 3.5mm - - - - -
RS Stock No. 151-2783
Mfr. Part No.2675626402
BrandFair-Rite
TWD53.00
Each (In a Pack of 3)
units
Round Cable Core 18.7 x 10.15 x 28.6mm EMI Suppression 24 Ω @ 200 KHz 75 Material 18.7mm 28.6mm 10.15mm 18.7mm - - - - -
RS Stock No. 169-6776
Mfr. Part No.ESD-R-19D
BrandKEMET
TWD28.00
Each (In a Box of 480)
units
Toroid Core 19 x 9 x 11mm Consumer Electronics - Nickel Zinc - 11mm 9mm 19mm - - - - -
RS Stock No. 169-6775
Mfr. Part No.ESD-R-15C-1
BrandKEMET
TWD10.60
Each (In a Box of 800)
units
Toroid Core 15 x 10.5 x 12mm Consumer Electronics - Ferrite - 12mm 10.5mm 15mm - - - - -