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 Impedance at 25 MHz Openable Series
RS Stock No. 163-3133
Mfr. Part No.74270104
TWD49.90
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. 124-1853
Mfr. Part No.74270111
TWD36.00
Each (In a Pack of 10)
units
Toroid Core 7.3 x 3.3 x 4.3mm EMI Suppression - 4 W 620 - 4.3mm 3.3mm 7.3mm - - - - -
RS Stock No. 167-8284
Mfr. Part No.B64290P0037X830
BrandEPCOS
TWD5.60
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. 644-1328
Mfr. Part No.HF70RH10X20X5
BrandTDK
TWD16.00
Each (In a Pack of 5)
units
Round Cable Core 10 (Dia.) x 20mm Round Cable - HF70 10mm 20mm 5mm 10mm - - - - -
RS Stock No. 170-7473
Mfr. Part No.FS-1RIN-106B-00
BrandBlock
TWD85.20
Each (In a Box of 5)
units
Toroid Core 26.9 x 14.5 x 14.6mm - - Iron Powder 26.9mm 14.6mm 14.5mm 26.9mm - - - - -
RS Stock No. 482-6632
Mfr. Part No.2643200101
BrandFair-Rite
TWD3.50
Each (In a Pack of 25)
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. 788-0200
Mfr. Part No.742701703
TWD56.00
Each
units
Toroid Core 25 x 15 x 12mm EMI Suppression - 7 W 380 12mm 12mm 15mm 25mm - - - - -
RS Stock No. 163-3217
Mfr. Part No.74277290
TWD219.10
Each (In a Tray of 88)
units
EMI Suppression 26.6 x 12.8 x 28.5mm EMI Suppression - - - 28.5mm 12.8mm 26.6mm - - - - -
RS Stock No. 467-2801
Mfr. Part No.2643626002
BrandFair-Rite
TWD1,370.00
Each
units
Round Cable Core 50.8 x 25.4 x 50.8mm EMI Suppression - 43 Material 50.8mm 50.8mm 25.4mm 50.8mm - - - - -
RS Stock No. 788-0181
Mfr. Part No.74270120
TWD53.20
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. 172-9983
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. 371-7278
Mfr. Part No.HF70RU26X29X13
BrandTDK
TWD77.30
Each (In a Pack of 10)
units
Ferrite Core 26 x 13 x 29mm Round Cable - HF70 26mm 29mm 13mm 26mm - - - - -
RS Stock No. 725-9032
Mfr. Part No.FSRH041D85RNB00B
BrandMurata
TWD1.60
Each (In a Pack of 20)
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. 172-9985
Mfr. Part No.2631250202
BrandFair-Rite
TWD45.50
Each (In a Box of 50)
units
Round Cable Core 6.35 x 2.95 x 25.4mm Suppression Components - 31 Material 6.35mm 25.4mm 2.95mm 6.35mm - - - - -
RS Stock No. 327-5465
Mfr. Part No.74270104
TWD52.00
Each
units
Toroid Core 31.7 (Dia.) x 8mm General Electronics - 4W620 31.7mm 8mm - 31.7mm - - - - -
RS Stock No. 163-4555
Mfr. Part No.74270176
TWD13.90
Each (In a Tray of 500)
units
Toroid Core 10 x 5 x 5mm EMI Suppression - 7 W 850 5mm 5mm 5mm 10mm - - - - -
RS Stock No. 261-8984
Mfr. Part No.RI 14 6 28
BrandRichco
TWD88.00
Each
units
Ferrite Core 14.3 (Dia.) x 28.6mm VE/CD - Ferrite 14.3mm 28.6mm 6.4mm 14.3mm - - - - -
RS Stock No. 163-4543
Mfr. Part No.742701111
TWD70.90
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. 136-9032
BrandRS PRO
TWD202.00
Each
units
Ferrite Ring 36 x 23 x 16.1mm EMI Suppression - - - - - - - - - - -
RS Stock No. 257-4446
Mfr. Part No.RT220-135-064
BrandRichco
TWD33.40
Each (In a Pack of 5)
units
Toroid Core 22 x 13.5 x 6.4mm Filtering - Ferrite - 6.4mm 13.5mm 22mm - - - - -