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. 644-1160
Mfr. Part No.HF70BB3.5X5X0.8
BrandTDK
SGD0.203
Each (In a Pack of 10)
units
Bead 3.5 x 0.8 x 5mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 5mm 0.8mm 3.5mm - - - - -
RS Stock No. 644-1665
Mfr. Part No.HF70T16X8X12
BrandTDK
SGD0.488
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 16 x 12 x 8mm Round Cable - HF70 16mm 8mm 12mm 16mm - - - - -
RS Stock No. 644-1148
Mfr. Part No.HF70BB3.5X3X1.3
BrandTDK
SGD0.208
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. 644-1609
Mfr. Part No.HF70T10X3X6
BrandTDK
SGD0.244
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 10 x 6 x 3mm Round Cable - HF70 10mm 3mm 6mm 10mm - - - - -
RS Stock No. 644-1306
Mfr. Part No.HF70BB9.5X10.4X4.9
BrandTDK
SGD0.677
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. 644-1463
Mfr. Part No.HF70RH16X28X9
BrandTDK
SGD1.632
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. 644-1283
Mfr. Part No.HF70BB9X10X4.5
BrandTDK
SGD0.588
Each (In a Pack of 10)
units
Bead 9 x 4.5 x 10mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 9mm 10mm 4.5mm 9mm - - - - -
RS Stock No. 644-1081
Mfr. Part No.HF40BB3.4X3X1
BrandTDK
SGD0.203
Each (In a Pack of 10)
units
Bead 3.4 x 1 x 3mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.4mm 3mm 1mm 3.4mm - - - - -
RS Stock No. 644-1722
Mfr. Part No.HF70T22X10X14
BrandTDK
SGD1.224
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 22 x 14 x 10mm Round Cable - HF70 22mm 10mm 14mm 22mm - - - - -
RS Stock No. 371-7391
Mfr. Part No.HF70T31X8X19
BrandTDK
SGD6.435
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 31 (Dia.) x 8mm Round Cable - HF70 31mm 8mm 19mm 31mm - - - - -
RS Stock No. 644-1384
Mfr. Part No.HF70RH14.3X14.3X6.35
BrandTDK
SGD1.09
Each (In a Pack of 5)
units
Round Cable Core 14.3 (Dia.) x 14.3mm Round Cable - HF70 14.3mm 14.3mm 6.35mm 14.3mm - - - - -
RS Stock No. 644-1788
Mfr. Part No.HF70T31X13X19
BrandTDK
SGD2.512
Each (In a Pack of 5)
units
EMI Suppression Toroid Core 31 x 19 x 13mm Round Cable - HF70 31mm 13mm 19mm 31mm - - - - -
RS Stock No. 644-1205
Mfr. Part No.HF70BB3.5X10X1.3
BrandTDK
SGD0.203
Each (In a Pack of 10)
units
Bead 3.5 x 1.3 x 10mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 3.5mm 10mm 1.3mm 3.5mm - - - - -
RS Stock No. 371-7240
Mfr. Part No.HF70RH26X29X13
BrandTDK
SGD4.979
Each (In a Pack of 10)
units
Cylindrical Core 26 x 13 x 29mm EMI Suppression - HF70 26mm 29mm 13mm 26mm - - - - -
RS Stock No. 644-1340
Mfr. Part No.HF70RH12X15X7.3
BrandTDK
SGD0.634
Each (In a Pack of 5)
units
Cylindrical Core 12 x 7.3 x 15mm EMI Suppression, Round Cable - HF70 12mm 15mm 7.3mm 12mm - - - - -
RS Stock No. 371-7212
Mfr. Part No.HF70RH14.3X28.6X6.35
BrandTDK
SGD1.088
Each (In a Pack of 10)
units
Cylindrical Core 14.3 x 6.35 x 28.6mm EMI Suppression - HF70 14.3mm - 6.35mm 14.3mm - - - - -
RS Stock No. 371-7385
Mfr. Part No.HF70T25X13X15
BrandTDK
SGD2.353
Each (In a Pack of 10)
units
EMI Suppression Toroid Core 25 (Dia.) x 13mm Round Cable - HF70 25mm 13mm 15mm 25mm - - - - -
RS Stock No. 644-1586
Mfr. Part No.HF70T8X4X4
BrandTDK
SGD0.271
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. 644-1508
Mfr. Part No.HF70RH19X29X13
BrandTDK
SGD3.222
Each (In a Pack of 5)
units
Round Cable Core 19 (Dia.) x 29mm Round Cable - HF70 19mm 29mm 13mm 19mm - - - - -
RS Stock No. 644-1227
Mfr. Part No.HF70BB4.5X5X1.6
BrandTDK
SGD0.203
Each (In a Pack of 10)
units
Bead 4.5 x 1.6 x 5mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 4.5mm 5mm 1.6mm 4.5mm - - - - -