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. 125-3314
Mfr. Part No.B64290L0084X087
BrandEPCOS
$47.60
Each
units
Toroid Core 104.8 x 63.7 x 16.5mm Automotive Electronics, EMC Components, General Electronics - N87 - 16.5mm 63.7mm 104.8mm - - - - -
RS Stock No. 170-1369
Mfr. Part No.B64290L0084X087
BrandEPCOS
$41.87
Each (On a Reel of 12)
units
Toroid Core 104.8 x 63.7 x 16.5mm Automotive Electronics, EMC Components, General Electronics - N87 - 16.5mm 63.7mm 104.8mm - - - - -
RS Stock No. 167-8290
Mfr. Part No.B64290L0659X830
BrandEPCOS
$6.00
Each (In a Box of 80)
units
Toroid Core 41.8 (Dia.) x 17.2mm General Electronics - N30 41.8mm 17.02mm 22.5mm 41.8mm - - - - -
RS Stock No. 212-0976
Mfr. Part No.B64290L0659X830
BrandEPCOS
$9.17
Each
units
Toroid Core 41.8 (Dia.) x 17.2mm - - N30 41.8mm 17.02mm 22.5mm 41.8mm - - - - -
RS Stock No. 212-0982
Mfr. Part No.B64290L0674X830
BrandEPCOS
$4.31
Each
units
Toroid Core 37.5 (Dia.) x 16.2mm General Electronics - N30 37.5mm 16.2mm 23mm 37.5mm - - - - -
RS Stock No. 167-8299
Mfr. Part No.B64290L0022X830
BrandEPCOS
$3.941
Each (In a Box of 100)
units
Toroid Core 41.8 x 26.2 x 12.5mm - - Ferrite 41.8mm 12.5mm 26.2mm 41.8mm - - - - -
RS Stock No. 290-6219
Mfr. Part No.B64290L0022X830
BrandEPCOS
$7.14
Each
units
Toroid Core 41.8 x 26.2 x 12.5mm - - Ferrite 41.8mm 12.5mm 26.2mm 41.8mm - - - - -
RS Stock No. 170-1363
Mfr. Part No.B64290L0038X087
BrandEPCOS
$0.138
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. 125-3309
Mfr. Part No.B64290L0038X087
BrandEPCOS
$0.214
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. 167-8277
Mfr. Part No.B64290L0048X830
BrandEPCOS
$2.68
Each (In a Box of 100)
units
Toroid Core 35.5 (Dia.) x 13.6mm General Electronics - N30 35.5mm 13.6mm 19.2mm 35.5mm - - - - -
RS Stock No. 125-3315
Mfr. Part No.B64290L0618X027
BrandEPCOS
$1.584
Each (In a Pack of 10)
units
Toroid Core 26.6 x 13.5 x 11mm Automotive Electronics, EMC Components, General Electronics - N37 - 11mm 13.5mm 26.6mm - - - - -
RS Stock No. 170-1374
Mfr. Part No.B64290L0632X830
BrandEPCOS
$0.717
Each (On a Reel of 1000)
units
Toroid Core 21.2 x 8.95 x 8.1mm Automotive Electronics, EMC Components, General Electronics - N30 - 8.1mm 8.95mm 21.2mm - - - - -
RS Stock No. 170-1364
Mfr. Part No.B64290L0044X087
BrandEPCOS
$0.188
Each (On a Reel of 1500)
units
Toroid Core 13.6 x 6.5 x 5.95mm Automotive Electronics, EMC Components, General Electronics - N87 - 5.95mm 6.5mm 13.6mm - - - - -
RS Stock No. 170-1378
Mfr. Part No.B64290L0730X087
BrandEPCOS
$28.65
Each (On a Reel of 12)
units
Toroid Core 89.3 x 52.4 x 14.8mm Automotive Electronics, EMC Components, General Electronics - N87 - 14.8mm 52.4mm 89.3mm - - - - -
RS Stock No. 212-0825
Mfr. Part No.B64290L0044X038
BrandEPCOS
$0.646
Each (In a Pack of 5)
units
Ferrite Core 13.6 (Dia.) x 5.95mm - - T38 13.6mm 5.95mm 6.5mm 12.5mm - - - - -
RS Stock No. 125-3311
Mfr. Part No.B64290L0045X038
BrandEPCOS
$0.904
Each (In a Pack of 25)
units
Toroid Core 17.2 x 8.5 x 7.3mm Automotive Electronics, EMC Components, General Electronics - T38 - 7.3mm 8.5mm 17.2mm - - - - -
RS Stock No. 212-0803
Mfr. Part No.B64290L0040X830
BrandEPCOS
$18.98
Each
units
Ferrite Core 60.1 x 39.2 x 18.8mm Broadband Transformers, Choke, Mixer, Pulse, Transformer - Ferrite N30 - 18.8mm 39.2mm 60.1mm - - - - -
RS Stock No. 170-1380
Mfr. Part No.B64290P0036X830
BrandEPCOS
$0.126
Each (On a Reel of 16000)
units
Toroid Core 4.17 x 2.23 x 1.75mm Automotive Electronics, EMC Components, General Electronics - N30 - 1.61mm 2.41mm 4.01mm - - - - -
RS Stock No. 167-0319
Mfr. Part No.B64290L0038X830
BrandEPCOS
$0.145
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. 125-3312
Mfr. Part No.B64290L0045X087
BrandEPCOS
$0.655
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 - - - - -