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. 212-0926
Mfr. Part No.B64290L0618X830
BrandEPCOS
MYR5.166
Each (In a Pack of 5)
units
Toroid Core 26.6 (Dia.) x 11mm General Electronics - N30 26.8mm 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 788-0197
Mfr. Part No.74270151
MYR18.69
Each
units
Toroid Core 34.6 x 20.8 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 20.8mm 34.6mm - - - - -
RS Stock No. 170-1363
Mfr. Part No.B64290L0038X087
BrandEPCOS
MYR0.378
Each (On a Reel of 3000)
units
Toroid Core 10.8 x 5.25 x 4.75mm Automotive Electronics, EMC Components, General Electronics - N87 - 4.75mm 5.25mm 10.8mm - - - - -
RS Stock No. 811-8979
Mfr. Part No.ESD-R-14A
BrandKEMET
MYR2.02
Each (In a Bag of 10)
units
Ferrite Core - Consumer Electronics - Ferrite - - - - 15 Dia. x 3.5mm 3.5mm ESD-R Toroidal Cores 6.2mm 1
RS Stock No. 163-4550
Mfr. Part No.74270151
MYR16.69
Each (In a Tray of 63)
units
Toroid Core 34.6 x 20.8 x 12.7mm EMI Suppression - 4 W 620 12.7mm 12.7mm 20.8mm 34.6mm - - - - -
RS Stock No. 162-0149
Mfr. Part No.B64290L0618X830
BrandEPCOS
MYR2.658
Each (In a Box of 500)
units
Toroid Core 26.6 (Dia.) x 11mm General Electronics - N30 26.8mm 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 644-2999
Mfr. Part No.HF40BB6X3.8X3A-G
BrandTDK
MYR0.891
Each (In a Pack of 10)
units
Bead 6 x 3 x 3.8mm Audio Equipment, Automotive, Computer Peripherals, Digital Interface, EMI Absorption, Imaging Devices, Telecom - Nickel Zinc 6mm 3.8mm 3mm 6mm - - - - -
RS Stock No. 257-4519
Mfr. Part No.RRH158-079-160-K5B
BrandRichco
MYR10.852
Each (In a Pack of 5)
units
Ferrite Core 15.8 x 7.9 x 16mm CATV, MATV, Wire Assembly - K5B 15.8mm - 7.9mm 15.8mm - - - - -
RS Stock No. 814-3388
Mfr. Part No.TX63/38/25-3E12
BrandFERROXCUBE
MYR80.45
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. 173-0003
Mfr. Part No.2631102002
BrandFair-Rite
MYR12.90
Each (In a Box of 212)
units
Round Cable Core 25.9 x 12.8 x 28.6mm Suppression Components - 31 Material 25.9mm 28.6mm 12.8mm 25.9mm - - - - -
RS Stock No. 466-9748
Mfr. Part No.2631102002
BrandFair-Rite
MYR13.15
Each
units
Round Cable Core 25.9 x 12.8 x 28.6mm Suppression Components - 31 Material 25.9mm 28.6mm 12.8mm 25.9mm - - - - -
RS Stock No. 212-0976
Mfr. Part No.B64290L0659X830
BrandEPCOS
MYR20.41
Each
units
Toroid Core 41.8 (Dia.) x 17.2mm - - N30 41.8mm 17.02mm 22.5mm 41.8mm - - - - -
RS Stock No. 260-6739
Mfr. Part No.7427015
MYR14.01
Each
units
Toroid Core 40.6 27.4 (Dia.) x 15mm General Electronics - 4W620 40.6mm 15mm 27.4mm 40.6mm - - - - -
RS Stock No. 174-1358
Mfr. Part No.TN10/6/4-3E25
BrandFERROXCUBE
MYR1.094
Each (In a Pack of 10)
units
Toroid Core 10.6 x 5.2 x 4.4mm Choke, Current Regulation, Energy Storage, Transformer - Ferrite - 4.4mm 5.2mm 10.6mm - - - - -
RS Stock No. 167-0407
Mfr. Part No.B64290L0044X830
BrandEPCOS
MYR0.612
Each (In a Box of 1500)
units
Ferrite Core 13.6 (Dia.) x 5.95mm - - N30 13.6mm 5.95mm 6.5mm 13.6mm - - - - -
RS Stock No. 171-0802
Mfr. Part No.TX63/38/25-3E12
BrandFERROXCUBE
MYR72.335
Each (On a Reel of 24)
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. 163-3136
Mfr. Part No.7427015
MYR15.697
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. 125-3309
Mfr. Part No.B64290L0038X087
BrandEPCOS
MYR0.538
Each (In a Pack of 100)
units
Toroid Core 10.8 x 5.25 x 4.75mm Automotive Electronics, EMC Components, General Electronics - N87 - 4.75mm 5.25mm 10.8mm - - - - -
RS Stock No. 163-4555
Mfr. Part No.74270176
MYR1.796
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. 125-3312
Mfr. Part No.B64290L0045X087
BrandEPCOS
MYR1.648
Each (In a Pack of 25)
units
Toroid Core 17.2 x 8.5 x 7.3mm Automotive Electronics, EMC Components, General Electronics - N87 - 7.3mm 8.5mm 17.2mm - - - - -