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. 644-1463
Mfr. Part No.HF70RH16X28X9
BrandTDK
SGD1.46
Each (In a Pack of 5)
units
Cylindrical Core 16 x 9 x 28mm EMI Suppression, Round Cable - HF70 16mm 28mm 9mm 16mm - - - - -
RS Stock No. 811-8960
Mfr. Part No.ESD-R-12S
BrandKEMET
SGD0.606
Each (In a Bag of 10)
units
Ferrite Core - Consumer Electronics - Ferrite - - - - 12 Dia. x 5.5mm 5.5mm ESD-R Toroidal Cores 7mm 1
RS Stock No. 467-2845
Mfr. Part No.2643665802
BrandFair-Rite
SGD1.029
Each (In a Pack of 10)
units
Round Cable Core 17.45 x 9.5 x 12.7mm EMI Suppression - 43 Material 17.45mm 12.7mm 9.5mm 17.45mm - - - - -
RS Stock No. 257-4519
Mfr. Part No.RRH158-079-160-K5B
BrandRichco
SGD3.538
Each (In a Pack of 5)
units
Ferrite Core 15.8 x 7.9 x 16mm CATV, MATV, Wire Assembly - K5B 15.8mm - 7.9mm 15.8mm - - - - -
RS Stock No. 170-1373
Mfr. Part No.B64290L0618X087
BrandEPCOS
SGD0.944
Each (On a Reel of 500)
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. 125-3312
Mfr. Part No.B64290L0045X087
BrandEPCOS
SGD0.516
Each (In a Pack of 25)
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. 811-9036
Mfr. Part No.ESD-R-25D
BrandKEMET
SGD2.722
Each (In a Bag of 5)
units
Ferrite Core - Consumer Electronics - Ferrite - - - - 26 Dia. x 15mm 15mm ESD-R Toroidal Cores 14mm 1
RS Stock No. 644-1508
Mfr. Part No.HF70RH19X29X13
BrandTDK
SGD3.174
Each (In a Pack of 5)
units
Round Cable Core 19 (Dia.) x 29mm Round Cable - HF70 19mm 29mm 13mm 19mm - - - - -
RS Stock No. 467-3012
Mfr. Part No.2643806402
BrandFair-Rite
SGD1.967
Each (In a Pack of 10)
units
Round Cable Core 25.4 (Dia.) x 12.7mm EMI Suppression - 43 Material 25.4mm - 15.5mm 25.4mm - - - - -
RS Stock No. 788-0200
Mfr. Part No.742701703
SGD2.22
Each
units
Toroid Core 25 x 15 x 12mm EMI Suppression - 7 W 380 12mm 12mm 15mm 25mm - - - - -
RS Stock No. 788-0181
Mfr. Part No.74270120
SGD2.32
Each (In a Bag of 5)
units
Toroid Core 21 x 13 x 12mm EMI Suppression - 4 W 620 12mm 12mm 13mm 21mm - - - - -
RS Stock No. 172-9979
Mfr. Part No.2643540102
BrandFair-Rite
SGD0.855
Each (In a Box of 1179)
units
Round Cable Core 14.3 x 6.35 x 10.15mm Suppression Components - 43 Material 14.3mm 10.15mm 6.35mm 14.3mm - - - - -
RS Stock No. 467-3602
Mfr. Part No.2843010302
BrandFair-Rite
SGD1.858
Each (In a Pack of 5)
units
Multi Aperture Core 9.5 x 4.75 x 19.45mm Suppression Components - 43 Material - 19.45mm 4.75mm 9.5mm - - - - -
RS Stock No. 257-4525
Mfr. Part No.RRH160-090-280-K5B
BrandRichco
SGD2.024
Each (In a Pack of 5)
units
Ferrite Core 16 x 9 x 18mm CATV, MATV, Wire Assembly - K5B 16mm 18mm 9mm 16mm - - - - -
RS Stock No. 260-6739
Mfr. Part No.7427015
SGD4.78
Each
units
Toroid Core 40.6 27.4 (Dia.) x 15mm General Electronics - 4W620 40.6mm 15mm 27.4mm 40.6mm - - - - -
RS Stock No. 169-6779
Mfr. Part No.ESD-R-25D
BrandKEMET
SGD1.43
Each (In a Box of 300)
units
Toroid Core 26 x 14 x 15mm Consumer Electronics - Ferrite - 15mm 14mm 26mm - - - - -
RS Stock No. 467-4295
Mfr. Part No.5961001201
BrandFair-Rite
SGD4.17
Each (In a Pack of 5)
units
- 29 x 19 x 13.85mm - - 61 Material 29mm 13.8mm 19mm 29mm - - - - -
RS Stock No. 467-2918
Mfr. Part No.2643801102
BrandFair-Rite
SGD0.332
Each (In a Pack of 50)
units
Round Cable Core 12.7 x 7.9 x 6.35mm EMI Suppression - 43 Material 12.7mm 6.35mm 7.9mm 12.7mm - - - - -
RS Stock No. 644-1586
Mfr. Part No.HF70T8X4X4
BrandTDK
SGD0.242
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 8 x 4 x 4mm Round Cable - HF70 8mm 4mm 4mm 8mm - - - - -
RS Stock No. 125-3322
Mfr. Part No.B64290L0699X087
BrandEPCOS
SGD19.27
Each
units
Toroid Core 65.3 x 36 x 26.6mm Automotive Electronics, EMC Components, General Electronics - N87 - 26.6mm 36mm 65.3mm - - - - -
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