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. 170-1370
Mfr. Part No.B64290L0618X027
BrandEPCOS
MYR2.368
Each (On a Reel of 500)
units
Toroid Core 26.6 x 13.5 x 11mm Automotive Electronics, EMC Components, General Electronics - N37 - 11mm 13.5mm 26.6mm - - - - -
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. 239-062
BrandRS PRO
MYR27.823
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. 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. 647-9907
Mfr. Part No.B64290L0038X830
BrandEPCOS
MYR0.684
Each (In a Pack of 10)
units
Ferrite Core 10.8 (Dia.) x 4.75mm - - N30 10.8mm 4.75mm 5.05mm 10.8mm - - - - -
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. 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. 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. 371-7391
Mfr. Part No.HF70T31X8X19
BrandTDK
MYR22.19
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. 125-3318
Mfr. Part No.B64290L0618X087
BrandEPCOS
MYR4.66
Each (In a Pack of 10)
units
Toroid Core 26.6 x 13.5 x 11mm Automotive Electronics, EMC Components, General Electronics - N87 - 11mm 13.5mm 26.6mm - - - - -
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. 172-9963
Mfr. Part No.2673015301
BrandFair-Rite
MYR0.532
Each (In a Box of 1000)
units
Bead 4.1 x 1.8 x 6.85mm Suppression Components - 73 Material 4.1mm 6.85mm 1.8mm 4.1mm - - - - -
RS Stock No. 239-056
BrandRS PRO
MYR14.207
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. 257-4446
Mfr. Part No.RT220-135-064
BrandRichco
MYR5.19
Each (In a Pack of 5)
units
Toroid Core 22 x 13.5 x 6.4mm Filtering - Ferrite - 6.4mm 13.5mm 22mm - - - - -
RS Stock No. 125-3314
Mfr. Part No.B64290L0084X087
BrandEPCOS
MYR101.48
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. 788-0200
Mfr. Part No.742701703
MYR8.20
Each
units
Toroid Core 25 x 15 x 12mm EMI Suppression - 7 W 380 12mm 12mm 15mm 25mm - - - - -
RS Stock No. 163-3133
Mfr. Part No.74270104
MYR5.855
Each (In a Tray of 63)
units
Toroid Core 31.7 x 19 x 8mm General Electronics - 4W620 31.7mm 8mm - 31.7mm - - - - -
RS Stock No. 163-4552
Mfr. Part No.742701703
MYR5.471
Each (In a Tray of 130)
units
Toroid Core 25 x 15 x 12mm EMI Suppression - 7 W 380 12mm 12mm 15mm 25mm - - - - -
RS Stock No. 163-4544
Mfr. Part No.742701112
MYR7.182
Each (In a Tray of 36)
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. 125-3320
Mfr. Part No.B64290L0674X038
BrandEPCOS
MYR21.895
Each (In a Pack of 2)
units
Toroid Core 37.5 x 21.7 x 16.2mm Automotive Electronics, EMC Components, General Electronics - T38 - 16.2mm 21.7mm 37.5mm - - - - -