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. 644-1182
Mfr. Part No.HF70BB3.5X5X1.3
BrandTDK
TWD7.00
Each (In a Pack of 10)
units
Bead 3.5 x 1.3 x 5mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 5mm 1.3mm 3.5mm - - - - -
RS Stock No. 169-6769
Mfr. Part No.ESD-R-12C
BrandKEMET
TWD7.40
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. 172-9970
Mfr. Part No.2643801102
BrandFair-Rite
TWD7.00
Each (In a Box of 400)
units
Round Cable Core 12.7 x 7.9 x 6.35mm EMI Suppression - 43 Material 12.7mm 6.35mm 7.9mm 12.7mm - - - - -
RS Stock No. 840-7213
Mfr. Part No.FS-1RIN-106B-00
BrandBlock
TWD110.00
Each
units
- 26.9 x 14.5 x 14.6mm - - Iron Powder 26.9mm 14.6mm 14.5mm 26.9mm - - - - -
RS Stock No. 170-4610
Mfr. Part No.TX16/9.6/6.3-3E5
BrandFERROXCUBE
TWD25.90
Each (On a Reel of 210)
units
Toroid Core 16.25 x 9.35 x 6.55mm Choke, Current Regulation, Energy Storage, Transformer - Ferrite - 6.55mm 9.35mm 16.25mm - - - - -
RS Stock No. 644-2999
Mfr. Part No.HF40BB6X3.8X3A-G
BrandTDK
TWD7.30
Each (In a Pack of 10)
units
Bead 6 x 3 x 3.8mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 6mm 3.8mm 3mm 6mm - - - - -
RS Stock No. 644-1586
Mfr. Part No.HF70T8X4X4
BrandTDK
TWD8.00
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 8 x 4 x 4mm Round Cable - HF70 8mm 4mm 4mm 8mm - - - - -
RS Stock No. 647-9890
Mfr. Part No.B64290L0044X830
BrandEPCOS
TWD8.40
Each (In a Pack of 10)
units
Ferrite Core 13.6 (Dia.) x 5.95mm - - N30 13.6mm 5.95mm 6.5mm 13.6mm - - - - -
RS Stock No. 144-9781
Mfr. Part No.7427009
TWD43.60
Each (In a Tray of 88)
units
Ferrite Core 17.5 x 9.5 x 28.5mm General Electronics - 3 W 800 - 28.5mm 9.5mm 17.5mm - - - - -
RS Stock No. 212-0881
Mfr. Part No.B64290L0082X830
BrandEPCOS
TWD318.00
Each
units
Toroid Core 50 (Dia.) x 20mm General Electronics - N30 51.8mm 20mm 28.5mm 51.8mm - - - - -
RS Stock No. 212-0803
Mfr. Part No.B64290L0040X830
BrandEPCOS
TWD376.00
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. 644-1328
Mfr. Part No.HF70RH10X20X5
BrandTDK
TWD19.80
Each (In a Pack of 5)
units
Round Cable Core 10 (Dia.) x 20mm Round Cable - HF70 10mm 20mm 5mm 10mm - - - - -
RS Stock No. 644-1249
Mfr. Part No.HF70BB5X5X2
BrandTDK
TWD7.00
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. 467-3090
Mfr. Part No.2661021801
BrandFair-Rite
TWD8.00
Each (In a Pack of 25)
units
EMI Suppression 5.1 x 1.45 x 11.1mm EMI Suppression - 61 Material 5.1mm 11.1mm 1.45mm 5.1mm - - - - -
RS Stock No. 212-0926
Mfr. Part No.B64290L0618X830
BrandEPCOS
TWD43.00
Each (In a Pack of 5)
units
Toroid Core 26.6 (Dia.) x 11mm General Electronics - N30 26.8mm 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 163-3135
Mfr. Part No.74270115
TWD205.70
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. 482-6575
Mfr. Part No.5943001101
BrandFair-Rite
TWD19.20
Each (In a Pack of 5)
units
Toroid Core 12.7 (Dia.) x 6.35mm Inductive Component - 43 Material 12.7mm 6.35mm 7.9mm 12.7mm - - - - -
RS Stock No. 467-2716
Mfr. Part No.2643540102
BrandFair-Rite
TWD12.60
Each (In a Pack of 10)
units
Round Cable Core 14.3 x 6.35 x 10.15mm Suppression Components - 43 Material 14.3mm 10.15mm 6.35mm 14.3mm - - - - -
RS Stock No. 327-5465
Mfr. Part No.74270104
TWD54.00
Each
units
Toroid Core 31.7 (Dia.) x 8mm General Electronics - 4W620 31.7mm 8mm - 31.7mm - - - - -
RS Stock No. 482-6632
Mfr. Part No.2643200101
BrandFair-Rite
TWD3.50
Each (In a Pack of 25)
units
Bead 5.1 x 1.45 x 3.4mm Suppression Components - 43 Material 5.1mm 3.4mm 1.45mm 5.1mm - - - - -