Ferrite Rings

Ferrite rings are toroidal (doughnut) shaped, or cylindrical shaped pieces of ferrite (a ceramic compound).

What do ferrite rings do?

Ferrite rings help to protect against Electromagnetic Interference) (EMI) and Radio Frequency interference (RFI). They prevent interference moving to a device or from a device

How do ferrite rings 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 ferrite rings 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.

Applications

Digital Audio systems
Computers
Sensitive electrical equipment

237 Products showing for Ferrite Rings

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Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 20 x 10 x 10mm RS Stock No.: 788-0204 Mfr. Part No.: 742701707 Datasheets: TWD34.40 Each (In a Bag of 5)	Wurth Elektronik	Toroid Core	20 x 10 x 10mm	EMI Suppression	-	7 W 850	10mm	10mm	10mm	10mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 26.6 x 13.5 x 11mm RS Stock No.: 170-1372 Mfr. Part No.: B64290L0618X038 Datasheets: TWD44.60 Each (On a Reel of 500)	EPCOS	Toroid Core	26.6 x 13.5 x 11mm	Automotive Electronics, EMC Components, General Electronics	-	T38	-	11mm	13.5mm	26.6mm
Wurth Elektronik Ferrite Ring Toroid Core, For: General Electronics, 31.7 x 19 x 8mm RS Stock No.: 163-3133 Mfr. Part No.: 74270104 Datasheets: TWD39.70 Each (In a Tray of 63)	Wurth Elektronik	Toroid Core	31.7 x 19 x 8mm	General Electronics	-	4W620	31.7mm	8mm	19mm	31.7mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 25 x 15 x 12mm RS Stock No.: 788-0200P Mfr. Part No.: 742701703 Datasheets: TWD46.00 Each (Supplied in a Bag)	Wurth Elektronik	Toroid Core	25 x 15 x 12mm	EMI Suppression	-	7 W 380	12mm	12mm	15mm	12mm
Essentra Ferrite Ring Toroid Core, For: Multi-Turn Suppression Core, 25 (Dia.) x 12mm RS Stock No.: 257-4452 Mfr. Part No.: RT250-150-120 K5B Datasheets: TWD122.40 Each (In a Pack of 5)	Essentra	Toroid Core	25 (Dia.) x 12mm	Multi-Turn Suppression Core	-	K5B	25mm	12mm	15mm	25mm
Wurth Elektronik Ferrite Ring EMI Suppression, For: Electromagnetic Interface, 4.1 x 1.6 x 4mm RS Stock No.: 123-4235 Mfr. Part No.: 74270012 Datasheets: TWD21.70 Each (In a Pack of 50)	Wurth Elektronik	EMI Suppression	4.1 x 1.6 x 4mm	Electromagnetic Interface	-	Ferrite, Nickel Zinc	-	4mm	1.6mm	4.1mm
KEMET Ferrite Ring Ferrite Core, For: Consumer Electronics RS Stock No.: 811-8960 Mfr. Part No.: ESD-R-12S Datasheets: TWD14.60 Each (In a Bag of 10)	KEMET	Ferrite Core	-	Consumer Electronics	-	Ferrite	-	-	-	-
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 25 x 15 x 12mm RS Stock No.: 788-0200 Mfr. Part No.: 742701703 Datasheets: TWD46.00 Each	Wurth Elektronik	Toroid Core	25 x 15 x 12mm	EMI Suppression	-	7 W 380	12mm	12mm	15mm	12mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 13.6 x 6.5 x 5.95mm RS Stock No.: 125-3310 Mfr. Part No.: B64290L0044X087 Datasheets: TWD7.40 Each (In a Pack of 50)	EPCOS	Toroid Core	13.6 x 6.5 x 5.95mm	Automotive Electronics, EMC Components, General Electronics	-	N87	-	5.95mm	6.5mm	13.6mm
Wurth Elektronik Ferrite Ring EMI Suppression, For: Electromagnetic Interface, 26.6 x 12.8 x 28.5mm RS Stock No.: 123-4234 Mfr. Part No.: 74277290 Datasheets: TWD212.00 Each	Wurth Elektronik	EMI Suppression	26.6 x 12.8 x 28.5mm	Electromagnetic Interface	-	Ferrite, Nickel Zinc	-	28.5mm	12.8mm	26.6mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 61 x 35.5 x 20mm RS Stock No.: 788-0226P Mfr. Part No.: 74270191 Datasheets: TWD226.00 Each (Supplied in a Tray)	Wurth Elektronik	Toroid Core	61 x 35.5 x 20mm	EMI Suppression	-	4 W 620	20mm	20mm	35.5mm	20mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 26.6 x 13.5 x 11mm RS Stock No.: 170-1370 Mfr. Part No.: B64290L0618X027 Datasheets: TWD23.10 Each (On a Reel of 500)	EPCOS	Toroid Core	26.6 x 13.5 x 11mm	Automotive Electronics, EMC Components, General Electronics	-	N37	-	11mm	13.5mm	26.6mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 51.8 x 28.5 x 21.3mm RS Stock No.: 125-3313 Mfr. Part No.: B64290L0082X087 Datasheets: TWD314.00 Each	EPCOS	Toroid Core	51.8 x 28.5 x 21.3mm	Automotive Electronics, EMC Components, General Electronics	-	N87	-	21.3mm	28.5mm	51.8mm
Wurth Elektronik Ferrite Ring Ferrite Core, For: General Electronics, 14.2 x 6.35 x 28.5mm RS Stock No.: 124-1534 Mfr. Part No.: 7427007 Datasheets: TWD24.50 Each (In a Pack of 10)	Wurth Elektronik	Ferrite Core	14.2 x 6.35 x 28.5mm	General Electronics	-	3 W 800	-	28.5mm	6.35mm	14.2mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 61 x 35.5 x 12.7mm RS Stock No.: 788-0143 Mfr. Part No.: 74270097 Datasheets: TWD205.00 Each	Wurth Elektronik	Toroid Core	61 x 35.5 x 12.7mm	EMI Suppression	-	4 W 620	12.7mm	12.7mm	35.5mm	12.7mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 16 x 12 x 16mm RS Stock No.: 788-0159 Mfr. Part No.: 74270110 Datasheets: TWD54.00 Each	Wurth Elektronik	Toroid Core	16 x 12 x 16mm	EMI Suppression	-	4 W 1500	16mm	16mm	12mm	16mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 18.6 x 10.2 x 10mm RS Stock No.: 788-0222 Mfr. Part No.: 74270182 Datasheets: TWD79.00 Each	Wurth Elektronik	Toroid Core	18.6 x 10.2 x 10mm	EMI Suppression	-	4 W 1500	10mm	10mm	10.2mm	10mm
Wurth Elektronik Ferrite Ring Toroid Core, For: EMI Suppression, 28 x 16 x 13mm RS Stock No.: 163-4549 Mfr. Part No.: 7427013 Datasheets: TWD41.30 Each (In a Tray of 50)	Wurth Elektronik	Toroid Core	28 x 16 x 13mm	EMI Suppression	-	3 W 800	13mm	13mm	16mm	13mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 13.6 x 6.5 x 5.95mm RS Stock No.: 170-1364 Mfr. Part No.: B64290L0044X087 Datasheets: TWD6.20 Each (On a Reel of 1500)	EPCOS	Toroid Core	13.6 x 6.5 x 5.95mm	Automotive Electronics, EMC Components, General Electronics	-	N87	-	5.95mm	6.5mm	13.6mm
EPCOS Ferrite Ring Toroid Core, For: Automotive Electronics, EMC Components, General Electronics, 10.8 x 5.25 x 4.75mm RS Stock No.: 170-1363 Mfr. Part No.: B64290L0038X087 Datasheets: TWD4.10 Each (On a Reel of 3000)	EPCOS	Toroid Core	10.8 x 5.25 x 4.75mm	Automotive Electronics, EMC Components, General Electronics	-	N87	-	4.75mm	5.25mm	10.8mm