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. 174-1364
Mfr. Part No.TN14/9/5-3E25
BrandFERROXCUBE
TWD31.40
Each (In a Pack of 10)
units
Toroid Core 14.6 x 8.2 x 5.5mm Choke, Current Regulation, Energy Storage, Transformer - Ferrite - 5.5mm 8.2mm 14.6mm - - - - -
RS Stock No. 484-6866
Mfr. Part No.2643626502
BrandFair-Rite
TWD107.40
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 - - - - -
RS Stock No. 170-1367
Mfr. Part No.B64290L0045X087
BrandEPCOS
TWD7.10
Each (On a Reel of 2000)
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. 144-9783
Mfr. Part No.74270033
TWD18.90
Each (In a Bag of 500)
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. 172-9985
Mfr. Part No.2631250202
BrandFair-Rite
TWD45.50
Each (In a Box of 50)
units
Round Cable Core 6.35 x 2.95 x 25.4mm Suppression Components - 31 Material 6.35mm 25.4mm 2.95mm 6.35mm - - - - -
RS Stock No. 788-0169
Mfr. Part No.742701112
TWD59.00
Each
units
Toroid Core 35.6 x 25.4 x 7.5mm EMI Suppression - 3 W 800 7.5mm 7.5mm 25.4mm 35.6mm - - - - -
RS Stock No. 151-2792
Mfr. Part No.2675821502
BrandFair-Rite
TWD59.70
Each (In a Pack of 3)
units
Round Cable Core 31 x 19 x 15mm EMI Suppression 11 Ω @ 200 KHz 75 Material 31mm 15mm 19mm 31mm - - - - -
RS Stock No. 167-5689
Mfr. Part No.FSRH041D85RNB00B
BrandMurata
TWD0.90
Each (In a Bag of 10000)
units
Bead 3.6 x 1 x 4.85mm Audio Equipment, Computer Peripherals - RN Material 3.6mm 4.85mm 1mm 3.6mm - - - - -
RS Stock No. 371-7290
Mfr. Part No.HF70SH13X0.7X12
BrandTDK
TWD21.20
Each (In a Pack of 10)
units
EMI Suppression 17 x 12 x 2.75mm Flat Cable - HF70 17mm 2.75mm 12mm 17mm - - - - -
RS Stock No. 162-1311
Mfr. Part No.74270181
TWD31.20
Each (In a Tray of 126)
units
Toroid Core 17.5 x 10.7 x 12.7mm EMI Suppression - 4 W 1500 12.7mm 12.7mm 10.7mm 17.5mm - - - - -
RS Stock No. 239-056
BrandRS PRO
TWD91.30
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. 644-1249
Mfr. Part No.HF70BB5X5X2
BrandTDK
TWD4.50
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. 163-3217
Mfr. Part No.74277290
TWD226.50
Each (In a Tray of 88)
units
EMI Suppression 26.6 x 12.8 x 28.5mm EMI Suppression - - - 28.5mm 12.8mm 26.6mm - - - - -
RS Stock No. 125-3310
Mfr. Part No.B64290L0044X087
BrandEPCOS
TWD9.40
Each (In a Pack of 50)
units
Toroid Core 13.6 x 6.5 x 5.95mm Automotive Electronics, EMC Components, General Electronics - N87 - 5.95mm 6.5mm 13.6mm - - - - -
RS Stock No. 125-3314
Mfr. Part No.B64290L0084X087
BrandEPCOS
TWD920.00
Each
units
Toroid Core 104.8 x 63.7 x 16.5mm Automotive Electronics, EMC Components, General Electronics - N87 - 16.5mm 63.7mm 104.8mm - - - - -
RS Stock No. 212-0869
Mfr. Part No.B64290L0045X830
BrandEPCOS
TWD19.40
Each (In a Pack of 5)
units
Ferrite Core 17.2 (Dia.) x 7.3mm - - N30 17.2mm 7.3mm 9.6mm 16mm - - - - -
RS Stock No. 788-0197
Mfr. Part No.74270151
TWD151.00
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. 265-1802
Mfr. Part No.RI 26 13 28
BrandRichco
TWD273.00
Each
units
Ferrite Core 26 (Dia.) x 28.5mm VE/CD - Ferrite 26mm 28.5mm 13mm 26mm - - - - -
RS Stock No. 467-5074
Mfr. Part No.2643665702
BrandFair-Rite
TWD39.20
Each (In a Pack of 5)
units
Round Cable Core 17.45 x 9.5 x 28.6mm Suppression Components - 43 Material 17.45mm 28.6mm 9.5mm 17.45mm - - - - -
RS Stock No. 172-9983
Mfr. Part No.2643665802
BrandFair-Rite
TWD33.70
Each (In a Box of 910)
units
Round Cable Core 17.45 x 9.5 x 12.7mm EMI Suppression - 43 Material 17.45mm 12.7mm 9.5mm 17.45mm - - - - -