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. 124-1532
Mfr. Part No.74270090
TWD112.80
Each (In a Pack of 10)
units
Axial Ferrite Bead 26 x 13 x 28.5mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 4 W 620 - 28.5mm 13mm 26mm - - - - -
RS Stock No. 466-9849
Mfr. Part No.2643000101
BrandFair-Rite
TWD1.50
Each (In a Pack of 50)
units
Bead 3.5 x 1.3 x 3.25mm Suppression Components - 43 Material 3.5mm 3.25mm 1.3mm 3.5mm - - - - -
RS Stock No. 124-1544
Mfr. Part No.7427012
TWD44.20
Each (In a Pack of 10)
units
EMI Suppression Toroidal Ferrite 23.5 x 12.6 x 14mm Coaxial Cable, Multiconductor Wire, Wire-Wrapping Cable, Wires - 4 W 620 - 14mm 12.6mm 23.5mm - - - - -
RS Stock No. 172-9989
Mfr. Part No.2631540002
BrandFair-Rite
TWD20.30
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. 466-9798
Mfr. Part No.2631540002
BrandFair-Rite
TWD36.00
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. 260-6739
Mfr. Part No.7427015
TWD123.00
Each
units
Toroid Core 40.6 27.4 (Dia.) x 15mm General Electronics - 4W620 40.6mm 15mm 27.4mm 40.6mm - - - - -
RS Stock No. 163-4549
Mfr. Part No.7427013
TWD45.70
Each (In a Tray of 50)
units
Toroid Core 28 x 16 x 13mm EMI Suppression - 3 W 800 13mm 13mm 16mm 28mm - - - - -
RS Stock No. 257-4395
Mfr. Part No.RT145-102-080-K5B
BrandRichco
TWD26.60
Each (In a Pack of 5)
units
Toroid Core 14.5 (Dia.) x 8mm Multi-Turn Suppression Core - K5B 14.5mm 8mm - 14.5mm - - - - -
RS Stock No. 788-0193
Mfr. Part No.7427013
TWD53.00
Each
units
Toroid Core 28 x 16 x 13mm EMI Suppression - 3 W 800 13mm 13mm 16mm 28mm - - - - -
RS Stock No. 647-9907
Mfr. Part No.B64290L0038X830
BrandEPCOS
TWD5.30
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. 124-1542
Mfr. Part No.74270031
TWD20.10
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. 644-1306
Mfr. Part No.HF70BB9.5X10.4X4.9
BrandTDK
TWD14.80
Each (In a Pack of 10)
units
Bead 9.5 x 4 x 10.4mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 9.52mm 10.4mm 4mm 9.5mm - - - - -
RS Stock No. 163-3136
Mfr. Part No.7427015
TWD117.50
Each (In a Bag of 30)
units
Toroid Core 40.6 27.4 (Dia.) x 15mm General Electronics - 4W620 40.6mm 15mm 27.4mm 40.6mm - - - - -
RS Stock No. 167-0319
Mfr. Part No.B64290L0038X830
BrandEPCOS
TWD2.80
Each (In a Box of 3000)
units
Ferrite Core 10.8 (Dia.) x 4.75mm - - N30 10.8mm 4.75mm 5.05mm 10.8mm - - - - -
RS Stock No. 136-8983
BrandRS PRO
TWD234.30
Each (In a Tray of 90)
units
Ferrite Ring 50 x 30 x 21.1mm EMI Suppression - K 4000 21.1mm 21.1mm 30mm 50mm - - - - -
RS Stock No. 814-3385
Mfr. Part No.433003080301
BrandFERROXCUBE
TWD826.00
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. 136-8984
BrandRS PRO
TWD227.80
Each (In a Tray of 90)
units
Ferrite Ring 58.3 x 40.8 x 18.6mm EMI Suppression - K 4000 18.6mm 18.6mm 40.8mm 58.3mm - - - - -
RS Stock No. 814-3388
Mfr. Part No.TX63/38/25-3E12
BrandFERROXCUBE
TWD509.00
Each
units
Ring Core 63.4 x 37.7 x 25.3mm Interference Suppression Coil, Pulse and Wide Band Transformers - 3E12 Material 63.4mm 25.3mm 37.7mm 63.4mm - - - - -
RS Stock No. 167-8284
Mfr. Part No.B64290P0037X830
BrandEPCOS
TWD5.50
Each (In a Box of 4000)
units
Ferrite Core 6.3 x 3.8 x 2.5mm General Electronics - N30 6.3mm 2.5mm - 6.3mm - - - - -
RS Stock No. 788-0143
Mfr. Part No.74270097
TWD227.00
Each
units
Toroid Core 61 x 35.5 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 35.5mm 61mm - - - - -