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 Inner Dimensions Outer Height Series Aperture Diameter
RS Stock No. 239-062
BrandRS PRO
PHP173.957
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. 136-9032
BrandRS PRO
PHP266.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 136-9023
BrandRS PRO
PHP2,330.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 136-8983
BrandRS PRO
PHP363.489
Each (In a Tray of 90)
units
Ferrite Ring 50 x 30 x 21.1mm - - K 4000 21.1mm 21.1mm 30mm 50mm - - - - -
RS Stock No. 136-8984
BrandRS PRO
PHP307.844
Each (In a Tray of 90)
units
Ferrite Ring 58.3 x 40.8 x 18.6mm - - K 4000 18.6mm 18.6mm 40.8mm 58.3mm - - - - -
RS Stock No. 136-9022
BrandRS PRO
PHP558.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 136-8980
BrandRS PRO
PHP146.814
Each (In a Tray of 140)
units
Ferrite Ring 36 x 23 x 16mm - - K 4000 16mm 16mm 23mm 36mm - - - - -
RS Stock No. 136-9021
BrandRS PRO
PHP659.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 136-8982
BrandRS PRO
PHP166.946
Each (In a Tray of 112)
units
Ferrite Ring 40 x 24 x 17.1mm - - K 4000 17.1mm 17.1mm 24mm 40mm - - - - -
RS Stock No. 239-056
BrandRS PRO
PHP54.80
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. 136-9033
BrandRS PRO
PHP303.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 136-8985
BrandRS PRO
PHP1,285.875
Each (In a Tray of 8)
units
Ferrite Ring 102 x 65.8 x 16.1mm - - K 4000 16.1mm 16.1mm 65.8mm 102mm - - - - -
RS Stock No. 788-0165
Mfr. Part No.742701111
PHP113.51
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. 163-4543
Mfr. Part No.742701111
PHP107.22
Each (In a Tray of 50)
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. 467-4172
Mfr. Part No.5943003801
BrandFair-Rite
PHP408.24
Each
units
Toroid Core 61 (Dia.) x 12.7mm Inductive Component - 43 Material 61mm 12.7mm 35.55mm 61mm - - - - -
RS Stock No. 163-4540
Mfr. Part No.74270097
PHP355.047
Each (In a Tray of 15)
units
Toroid Core 61 x 35.5 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 35.5mm 61mm - - - - -
RS Stock No. 788-0143
Mfr. Part No.74270097
PHP369.60
Each
units
Toroid Core 61 x 35.5 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 35.5mm 61mm - - - - -
RS Stock No. 467-2659
Mfr. Part No.2643250402
BrandFair-Rite
PHP12.504
Each (In a Pack of 5)
units
EMI Suppression 6.35 x 2.95 x 12.7mm EMI Suppression - 43 Material 6.35mm 12.7mm 2.95mm 6.35mm - - - - -
RS Stock No. 290-6219
Mfr. Part No.B64290L0022X830
BrandEPCOS
PHP175.77
Each
units
Toroid Core 41.8 x 26.2 x 12.5mm - - Ferrite 41.8mm 12.5mm 26.2mm 41.8mm - - - - -
RS Stock No. 644-1665
Mfr. Part No.HF70T16X8X12
BrandTDK
PHP24.629
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 16 x 12 x 8mm Round Cable - HF70 16mm 8mm 12mm 16mm - - - - -
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