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. 163-4550
Mfr. Part No.74270151
SGD6.31
Each (In a Tray of 63)
units
Toroid Core 34.6 x 20.8 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 20.8mm 34.6mm - - - - -
RS Stock No. 644-1081
Mfr. Part No.HF40BB3.4X3X1
BrandTDK
SGD0.207
Each (In a Pack of 10)
units
Bead 3.4 x 1 x 3mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.4mm 3mm 1mm 3.4mm - - - - -
RS Stock No. 123-4230
Mfr. Part No.7427006
SGD1.323
Each (In a Pack of 8)
units
EMI Suppression 12 x 8.5 x 15mm - - Ferrite, Nickel Zinc - 15mm 8.5mm 12mm - - - - -
RS Stock No. 261-9000
Mfr. Part No.RI 18 10 28
BrandRichco
SGD6.91
Each
units
Ferrite Core 17.5 (Dia.) x 28.5mm VE/CD - Ferrite 17.5mm 28.5mm 10mm 17.5mm - - - - -
RS Stock No. 212-0718
Mfr. Part No.B64290A0084X830
BrandEPCOS
SGD60.15
Each
units
Ferrite Core 104.8 x 63.7 x 16.3mm Broadband Transformers, Choke, Mixer, Pulse, Transformer - Copper (Plate), Ferrite (Core) - 16.3mm 63.7mm 104.8mm - - - - -
RS Stock No. 371-7391
Mfr. Part No.HF70T31X8X19
BrandTDK
SGD6.562
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 31 (Dia.) x 8mm Round Cable - HF70 31mm 8mm 19mm 31mm - - - - -
RS Stock No. 466-9798
Mfr. Part No.2631540002
BrandFair-Rite
SGD1.648
Each (In a Pack of 5)
units
Round Cable Core 14.3 x 6.35 x 28.6mm Suppression Components - 31 Material 14.3mm 28.6mm 6.35mm 14.3mm - - - - -
RS Stock No. 167-8296
Mfr. Part No.B64290A0084X830
BrandEPCOS
SGD43.448
Each (In a Box of 12)
units
Ferrite Core 102 x 65.8 x 15mm Broadband Transformers, Choke, Mixer, Pulse, Transformer - Copper (Plate), Ferrite (Core) - 16.3mm 63.7mm 104.8mm - - - - -
RS Stock No. 163-3197
Mfr. Part No.7427006
SGD1.092
Each (In a Tray of 128)
units
EMI Suppression 12 x 8.5 x 15mm EMI Suppression - Ferrite, Nickel Zinc - 15mm 8.5mm 12mm - - - - -
RS Stock No. 167-8264
Mfr. Part No.B64290L0044X038
BrandEPCOS
SGD0.229
Each (In a Box of 1500)
units
Ferrite Core 13.6 (Dia.) x 5.95mm - - T38 13.6mm 5.95mm 6.5mm 12.5mm - - - - -
RS Stock No. 788-0197
Mfr. Part No.74270151
SGD6.94
Each
units
Toroid Core 34.6 x 20.8 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 20.8mm 34.6mm - - - - -
RS Stock No. 644-1722
Mfr. Part No.HF70T22X10X14
BrandTDK
SGD1.248
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 22 x 14 x 10mm Round Cable - HF70 22mm 10mm 14mm 22mm - - - - -
RS Stock No. 163-3198
Mfr. Part No.74270071
SGD0.80
Each (In a Bag of 500)
units
EMI Suppression 3.5 x 1.2 x 3mm EMI Suppression - Ferrite, Nickel Zinc - 3mm 1.2mm 3.5mm - - - - -
RS Stock No. 124-1849
Mfr. Part No.742701716
SGD1.439
Each (In a Pack of 10)
units
EMI Suppression Toroidal Ferrite 12.7 x 7.9 x 6.35mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 7 W 380 - 6.35mm 7.9mm 12.7mm - - - - -
RS Stock No. 265-1795
Mfr. Part No.RI 16 9 28
BrandRichco
SGD5.47
Each
units
Ferrite Core 16 (Dia.) x 28mm VE/CD - Ferrite 16mm 28mm 9mm 16mm - - - - -
RS Stock No. 644-1283
Mfr. Part No.HF70BB9X10X4.5
BrandTDK
SGD0.599
Each (In a Pack of 10)
units
Bead 9 x 4.5 x 10mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 9mm 10mm 4.5mm 9mm - - - - -
RS Stock No. 172-9989
Mfr. Part No.2631540002
BrandFair-Rite
SGD1.14
Each (In a Box of 376)
units
Round Cable Core 14.3 x 6.35 x 28.6mm Suppression Components - 31 Material 14.3mm 28.6mm 6.35mm 14.3mm - - - - -
RS Stock No. 644-1384
Mfr. Part No.HF70RH14.3X14.3X6.35
BrandTDK
SGD1.112
Each (In a Pack of 5)
units
Round Cable Core 14.3 (Dia.) x 14.3mm Round Cable - HF70 14.3mm 14.3mm 6.35mm 14.3mm - - - - -
RS Stock No. 239-062
BrandRS PRO
SGD8.227
Each (In a Pack of 6)
units
Ferrite Core 12.7 (Dia.) x 28.5mm EMI Suppression - Ferrite 28.5mm 28.57mm 13.77mm 28.5mm - - - - -
RS Stock No. 212-0982
Mfr. Part No.B64290L0674X830
BrandEPCOS
SGD6.32
Each
units
Toroid Core 37.5 (Dia.) x 16.2mm General Electronics - N30 37.5mm 16.2mm 23mm 37.5mm - - - - -