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. 172-9989
Mfr. Part No.2631540002
BrandFair-Rite
MYR3.855
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. 170-1377
Mfr. Part No.B64290L0699X087
BrandEPCOS
MYR41.814
Each (On a Reel of 30)
units
Toroid Core 65.3 x 36 x 26.6mm Automotive Electronics, EMC Components, General Electronics - N87 - 26.6mm 36mm 65.3mm - - - - -
RS Stock No. 170-1376
Mfr. Part No.B64290L0674X087
BrandEPCOS
MYR8.987
Each (On a Reel of 100)
units
Toroid Core 37.5 x 21.7 x 16.2mm Automotive Electronics, EMC Components, General Electronics - N87 - 16.2mm 21.7mm 37.5mm - - - - -
RS Stock No. 172-9974
Mfr. Part No.2843000302
BrandFair-Rite
MYR1.883
Each (In a Box of 350)
units
Multi Aperture Core 13.3 x 3.8 x3.8 x 10.3mm Suppression Components - 43 Material - 13.3mm 3.8mm 7.5mm - - - - -
RS Stock No. 125-3316
Mfr. Part No.B64290L0618X037
BrandEPCOS
MYR5.566
Each (In a Pack of 10)
units
Toroid Core 26.6 x 13.5 x 11mm Automotive Electronics, EMC Components, General Electronics - T37 - 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 163-4546
Mfr. Part No.74270119
MYR3.26
Each (In a Tray of 184)
units
Toroid Core 22.5 x 13.8 x 6.4mm EMI Suppression - 3 W 800 6.4mm 6.4mm 13.8mm 22.5mm - - - - -
RS Stock No. 466-9798
Mfr. Part No.2631540002
BrandFair-Rite
MYR4.50
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. 644-1328
Mfr. Part No.HF70RH10X20X5
BrandTDK
MYR2.496
Each (In a Pack of 5)
units
Round Cable Core 10 (Dia.) x 20mm Round Cable - HF70 10mm 20mm 5mm 10mm - - - - -
RS Stock No. 170-1378
Mfr. Part No.B64290L0730X087
BrandEPCOS
MYR77.059
Each (On a Reel of 12)
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. 174-1229
Mfr. Part No.TN9/6/3-4C65
BrandFERROXCUBE
MYR5.376
Each (In a Pack of 10)
units
Toroid Core 9.5 x 5.4 x 3.4mm Choke, Current Regulation, Energy Storage, Transformer - Ferrite, 4C65 - 3.4mm 5.4mm 9.5mm - - - - -
RS Stock No. 170-1371
Mfr. Part No.B64290L0618X037
BrandEPCOS
MYR3.109
Each (On a Reel of 500)
units
Toroid Core 26.6 x 13.5 x 11mm Automotive Electronics, EMC Components, General Electronics - T37 - 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 124-1542
Mfr. Part No.74270031
MYR2.646
Each (In a Pack of 10)
units
EMI Suppression Axial Ferrite Bead 11.5 x 5 x 20.5mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 4 W 1500 - 20.5mm 5mm 11.5mm - - - - -
RS Stock No. 125-3323
Mfr. Part No.B64290L0730X087
BrandEPCOS
MYR82.97
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. 814-3385
Mfr. Part No.433003080301
BrandFERROXCUBE
MYR128.26
Each
units
Ring Core 63.4 x 37.7 x 25.3mm Interference Suppression Coil, Pulse and Wide Band Transformers - 3E10 Material 63.4mm 25.3mm 37.7mm 63.4mm - - - - -
RS Stock No. 788-0187
Mfr. Part No.74270119
MYR3.854
Each (In a Bag of 5)
units
Toroid Core 22.5 x 13.8 x 6.4mm EMI Suppression - 3 W 800 6.4mm 6.4mm 13.8mm 22.5mm - - - - -
RS Stock No. 163-4555
Mfr. Part No.74270176
MYR1.796
Each (In a Tray of 500)
units
Toroid Core 10 x 5 x 5mm EMI Suppression - 7 W 850 5mm 5mm 5mm 10mm - - - - -
RS Stock No. 125-3321
Mfr. Part No.B64290L0674X087
BrandEPCOS
MYR13.195
Each (In a Pack of 2)
units
Toroid Core 37.5 x 21.7 x 16.2mm Automotive Electronics, EMC Components, General Electronics - N87 - 16.2mm 21.7mm 37.5mm - - - - -
RS Stock No. 482-6575
Mfr. Part No.5943001101
BrandFair-Rite
MYR1.132
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. 371-7212
Mfr. Part No.HF70RH14.3X28.6X6.35
BrandTDK
MYR3.752
Each (In a Pack of 10)
units
Cylindrical Core 14.3 x 6.35 x 28.6mm EMI Suppression - HF70 14.3mm - 6.35mm 14.3mm - - - - -
RS Stock No. 125-3322
Mfr. Part No.B64290L0699X087
BrandEPCOS
MYR54.37
Each
units
Toroid Core 65.3 x 36 x 26.6mm Automotive Electronics, EMC Components, General Electronics - N87 - 26.6mm 36mm 65.3mm - - - - -