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. 172-9983
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 - - - - -
RS Stock No. 467-3595
Mfr. Part No.2843009902
BrandFair-Rite
TWD192.00
Each
units
Multi Aperture Core 14.25 x 6.35 x 28.7mm Suppression Components - 43 Material - 28.7mm 6.35mm 14.25mm - - - - -
RS Stock No. 125-3323
Mfr. Part No.B64290L0730X087
BrandEPCOS
TWD683.00
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. 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. 467-4172
Mfr. Part No.5943003801
BrandFair-Rite
TWD266.00
Each
units
Toroid Core 61 (Dia.) x 12.7mm Inductive Component - 43 Material 61mm 12.7mm 35.55mm 61mm - - - - -
RS Stock No. 788-0222
Mfr. Part No.74270182
TWD92.00
Each
units
Toroid Core 18.6 x 10.2 x 10mm EMI Suppression - 4 W 1500 10mm 10mm 10.2mm 18.6mm - - - - -
RS Stock No. 170-1371
Mfr. Part No.B64290L0618X037
BrandEPCOS
TWD27.30
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. 257-4503
Mfr. Part No.RRH157-070-286-K5B
BrandRichco
TWD71.60
Each (In a Pack of 5)
units
Ferrite Core 15.65 x 6.99 x 28.57mm CATV, MATV, Wire Assembly - K5B 15.65mm - 6.99mm 15.65mm - - - - -
RS Stock No. 170-1364
Mfr. Part No.B64290L0044X087
BrandEPCOS
TWD4.00
Each (On a Reel of 1500)
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. 167-8285
Mfr. Part No.B64290L0674X830
BrandEPCOS
TWD76.10
Each (In a Box of 100)
units
Toroid Core 37.5 (Dia.) x 16.2mm General Electronics - N30 37.5mm 16.2mm 23mm 37.5mm - - - - -
RS Stock No. 172-9963
Mfr. Part No.2673015301
BrandFair-Rite
TWD6.10
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. 151-2725
Mfr. Part No.2675023002
BrandFair-Rite
TWD19.00
Each (In a Tray of 1128)
units
Round Cable Core 9.5 x 5.1 x 19mm EMI Suppression 17 Ω @ 200 KHz 75 Material 9.5mm 19mm 5.1mm 9.5mm - - - - -
RS Stock No. 172-9947
Mfr. Part No.2643200101
BrandFair-Rite
TWD2.70
Each (In a Box of 5000)
units
Bead 5.1 x 1.45 x 3.4mm Suppression Components - 43 Material 5.1mm 3.4mm 1.45mm 5.1mm - - - - -
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. 788-0165
Mfr. Part No.742701111
TWD77.00
Each
units
Toroid Core 29.5 x 19 x 7.7mm EMI Suppression - 3 W 800 7.7mm 7.7mm 19mm 29.5mm - - - - -
RS Stock No. 467-4554
Mfr. Part No.5978002701
BrandFair-Rite
TWD340.20
Each (In a Pack of 5)
units
Toroid Core 35.55 x 23 x 12.7mm Inductive Component - 78 Material 35.55mm 23mm 12.7mm 35.55mm - - - - -
RS Stock No. 163-3194
Mfr. Part No.74270001
TWD12.10
Each (In a Bag of 5000)
units
EMI Suppression 2.5 x 0.76 x 4mm EMI Suppression - Ferrite, Nickel Zinc - 4mm 0.76mm 2.5mm - - - - -
RS Stock No. 163-4554
Mfr. Part No.742701707
TWD34.70
Each (In a Tray of 165)
units
Toroid Core 20 x 10 x 10mm EMI Suppression - 7 W 850 10mm 10mm 10mm 20mm - - - - -
RS Stock No. 644-1148
Mfr. Part No.HF70BB3.5X3X1.3
BrandTDK
TWD7.00
Each (In a Pack of 10)
units
Bead 3.5 x 1.3 x 3mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 3mm 1.3mm 3.5mm - - - - -
RS Stock No. 151-2787
Mfr. Part No.2675102002
BrandFair-Rite
TWD157.30
Each (In a Pack of 3)
units
Round Cable Core 25.9 x 12.8 x 28.6mm EMI Suppression 30 Ω @ 200 KHz 75 Material 25.9mm 28.6mm 12.8mm 25.9mm - - - - -