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. 257-4418
Mfr. Part No.RT165-082-160-K5B
BrandRichco
TWD46.80
Each (In a Pack of 5)
units
Toroid Core 16.5 x 8 x 16mm Multi-Turn Suppression Core - K5B 16.5mm 16mm 8.2mm 16.5mm - - - - -
RS Stock No. 170-1363
Mfr. Part No.B64290L0038X087
BrandEPCOS
TWD3.00
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. 644-1081
Mfr. Part No.HF40BB3.4X3X1
BrandTDK
TWD7.00
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. 163-3198
Mfr. Part No.74270071
TWD17.60
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. 466-9855
Mfr. Part No.2643000201
BrandFair-Rite
TWD3.50
Each (In a Pack of 50)
units
Bead 2 x 1.05 x 3.8mm Suppression Components - 43 Material 2mm 3.8mm 1.05mm 2mm - - - - -
RS Stock No. 811-9014
Mfr. Part No.ESD-R-19D
BrandKEMET
TWD51.20
Each (In a Bag of 5)
units
Toroid Core 19 x 9 x 11mm Consumer Electronics - Nickel Zinc - 11mm 9mm 19mm - - - - -
RS Stock No. 163-3523
Mfr. Part No.74270057
TWD137.90
Each (In a Tray of 60)
units
Ferrite Core 19 (Dia.) x 50.8mm General Electronics - Ferrite - 50.8mm 11.5mm 19mm - - - - -
RS Stock No. 811-8979
Mfr. Part No.ESD-R-14A
BrandKEMET
TWD18.60
Each (In a Bag of 10)
units
Ferrite Core - Consumer Electronics - Ferrite - - - - 15 Dia. x 3.5mm 3.5mm ESD-R Toroidal Cores 6.2mm 1
RS Stock No. 173-0015
Mfr. Part No.2643803802
BrandFair-Rite
TWD370.80
Each (In a Box of 100)
units
Round Cable Core 61 x 35.55 x 12.7mm EMI Suppression - 43 Material 61mm 12.7mm 35.55mm 61mm - - - - -
RS Stock No. 124-1849
Mfr. Part No.742701716
TWD32.40
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. 161-4584
Mfr. Part No.ESD-R-25D-8
BrandKEMET
TWD36.70
Each (In a Box of 600)
units
Toroid Core 25 x 15 x 8mm Consumer Electronics - Ferrite - 8mm 15mm 25mm - - - - -
RS Stock No. 371-7256
Mfr. Part No.HF70RU12X15X7.3
BrandTDK
TWD59.00
Each (In a Pack of 10)
units
Ferrite Core 12 x 7.3 x 15mm Round Cable - HF70 12mm 15mm 7.3mm 12mm - - - - -
RS Stock No. 261-9000
Mfr. Part No.RI 18 10 28
BrandRichco
TWD150.00
Each
units
Ferrite Core 17.5 (Dia.) x 28.5mm VE/CD - Ferrite 17.5mm 28.5mm 10mm 17.5mm - - - - -
RS Stock No. 239-056
BrandRS PRO
TWD91.20
Each (In a Pack of 6)
units
Ferrite Core 15.64 x 6.99 x 28.57mm EMI Suppression - Ferrite, Nickel Zinc - 28.57mm 6.99mm 15.64mm - - - - -
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. 467-4217
Mfr. Part No.5943007601
BrandFair-Rite
TWD48.40
Each (In a Pack of 5)
units
- 22.1 x 13.7 x 12.7mm - - 43 Material 22.1mm 12.7mm 13.7mm 22.1mm - - - - -
RS Stock No. 644-1205
Mfr. Part No.HF70BB3.5X10X1.3
BrandTDK
TWD7.00
Each (In a Pack of 10)
units
Bead 3.5 x 1.3 x 10mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 10mm 1.3mm 3.5mm - - - - -
RS Stock No. 124-1535
Mfr. Part No.74270053
TWD41.20
Each (In a Pack of 10)
units
EMI Suppression Axial Ferrite Bead 16 x 8 x 28.5mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 3 W 800 - 28.5mm 8mm 16mm - - - - -
RS Stock No. 125-3311
Mfr. Part No.B64290L0045X038
BrandEPCOS
TWD19.20
Each (In a Pack of 25)
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. 169-6774
Mfr. Part No.ESD-R-15C
BrandKEMET
TWD17.40
Each (In a Box of 800)
units
Toroid Core 15.2 x 10.5 x 12.5mm Consumer Electronics - Ferrite - 12.5mm 10.5mm 15.2mm - - - - -