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. 125-3312
Mfr. Part No.B64290L0045X087
BrandEPCOS
SGD0.516
Each (In a Pack of 25)
units
Toroid Core 17.2 x 8.5 x 7.3mm Automotive Electronics, EMC Components, General Electronics - N87 - 7.3mm 8.5mm 17.2mm - - - - -
RS Stock No. 814-3360
Mfr. Part No.433003080271
BrandFERROXCUBE
SGD4.15
Each
units
Ring Core 36.25 x 22.75 x 15.6mm Interference Suppression Coil, Pulse and Wide Band Transformers - 3E10 Material 36.25mm 15.6mm 22.75mm 36.25mm - - - - -
RS Stock No. 467-2716
Mfr. Part No.2643540102
BrandFair-Rite
SGD0.577
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. 125-3323
Mfr. Part No.B64290L0730X087
BrandEPCOS
SGD28.05
Each
units
Toroid Core 89.3 x 52.4 x 14.8mm Automotive Electronics, EMC Components, General Electronics - N87 - 14.8mm 52.4mm 89.3mm - - - - -
RS Stock No. 151-2774
Mfr. Part No.2675540202
BrandFair-Rite
SGD0.754
Each (In a Pack of 10)
units
Round Cable Core 14.3 x 6.35 x 13.45mm EMI Suppression 16 Ω @ 200 KHz 75 Material 14.3mm 13.45mm 6.35mm 14.3mm - - - - -
RS Stock No. 151-2783
Mfr. Part No.2675626402
BrandFair-Rite
SGD2.02
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. 484-6866
Mfr. Part No.2643626502
BrandFair-Rite
SGD3.464
Each (In a Pack of 5)
units
Round Cable Core 18.7 x 10.15 x 50.8mm EMI Suppression - 43 Material 18.7mm 50.8mm 10.15mm 18.7mm - - - - -
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