Ferrite Sleeves

Ferrite sleeves, also known as ferrite beads, are non-conductive components used in electrical circuits to suppress or filter high frequency electromagnetic interference noise. They prevent electromagnetic interference to and from a device. 


How do ferrite sleeves work?

If a device produces radio frequency energy, the conductive cable is used as an antenna to transmit the energy through the device. The ferrite sleeve or bead reduces the output of EMI from the device itself and prevents the cable from acting as an antenna for other sources of EMI, like household appliances. 


Uses for ferrite sleeves


Ferrite sleeves are commonly found on data cables and medical equipment. They may be built in to the equipment or be separate items that can be clamped on to a cable. You may see larger ones on external cables, like on computer monitor cables, while smaller ones can be used internally in electrical circuits, on printed circiut boards (PCBs) for example. Ferrite sleeves are often needed for regulatory compliance. 


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Description Price Series Type Application Material Impedance at 25 MHz Key Openable Impedance at 100 MHz Outer Dimensions Aperture Diameter Impedance at 500 MHz Number of Apertures Outer Depth Outer Height
RS Stock No. 222-4416
Mfr. Part No.MTFC 231114T
BrandRichco
£5.84
Each
Units
MTFC Toroid Core Computer Peripherals Ferrite - - Yes 121 26.6 Dia. x 18.6mm 10.9mm - 1 - 18.6mm
RS Stock No. 756-8682
Mfr. Part No.74271358
£8.39
Each
Units
WE-NCF Split Core Computers, Easy To Mount On Already Installed Cables Or Cables With Connecters, Interference Problems On Data Lines, Terminals 4W620 - - Yes 98Ω 60 x 45.5 x 15mm 26.5mm - 1 45.5mm 15mm
RS Stock No. 163-3989
Mfr. Part No.74271358
£7.624
Each (In a Tray of 16)
Units
WE-NCF Split Core - 4W620 - - Yes 98Ω 60 x 45.5 x 15mm 26.5mm - 1 45.5mm 15mm
RS Stock No. 163-5437
Mfr. Part No.74271633
£5.613
Each (In a Box of 38)
Units
STAR-GAP Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 35.1 x 21.7 x 19mm 4.5 → 8mm - 1 21.7mm 19mm
RS Stock No. 814-9982
Mfr. Part No.74271633
£5.06
Each
Units
STAR-GAP Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 35.1 x 21.7 x 19mm 4.5 → 8mm - 1 21.7mm 19mm
RS Stock No. 466-9192
Mfr. Part No.0444164181
BrandFair-Rite
£2.62
Each
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes - 31 x 15.25 x 39.4mm 13.05mm - 1 15.25mm 39.4mm
RS Stock No. 169-6795
Mfr. Part No.ESD-SR-160H
BrandKEMET
£2.34
Each (In a Box of 210)
Units
ESD-SR Snap-on Cores Snap Ferrite Round Cable Nickel Zinc - - Yes - 19.5 x 38.5 x 19.5mm 9mm - 1 38.5mm 19.5mm
RS Stock No. 811-9118
Mfr. Part No.ESD-SR-110
BrandKEMET
£1.85
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 14.4 x 28 x 14.2mm 5mm - 1 28mm 14.2mm
RS Stock No. 811-9127
Mfr. Part No.ESD-SR-160H
BrandKEMET
£3.21
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Round Cable Nickel Zinc - - Yes - 19.5 x 38.5 x 19.5mm 9mm - 1 38.5mm 19.5mm
RS Stock No. 814-3401
Mfr. Part No.432703021131
BrandFERROXCUBE
£7.48
Each
Units
- Cable Shield EMI Suppression 4S2 Material - - Yes - 29 x 32.5 x 14.8mm 13.4mm - 1 29mm 14.8mm
RS Stock No. 173-0008
Mfr. Part No.0444164181
BrandFair-Rite
£2.449
Each (In a Box of 110)
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes - 31 x 15.25 x 39.4mm 13.05mm - 1 15.25mm 39.4mm
RS Stock No. 466-9186
Mfr. Part No.0443800506
BrandFair-Rite
£1.30
Each
Units
- Round Cable Core Suppression Components Nylon 66 - - Yes - 29.7 x 15.6 x 25.4mm 12.8mm - 1 15.6mm 25.4mm
RS Stock No. 169-6792
Mfr. Part No.ESD-SR-110
BrandKEMET
£0.912
Each (In a Box of 900)
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 14.4 x 28 x 14.2mm 5mm - 1 28mm 14.2mm
RS Stock No. 170-3332
Mfr. Part No.ZCAT2436-1330A-BK
BrandTDK
£1.48
Each (In a Box of 400)
Units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 30Ω 23.5 Dia. x 36mm 13mm - 1 - 36mm
RS Stock No. 916-4333
Mfr. Part No.ZCAT2436-1330A-BK
BrandTDK
£2.84
Each (In a Pack of 2)
Units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 30Ω 23.5 Dia. x 36mm 13mm - 1 - 36mm
RS Stock No. 163-5435
Mfr. Part No.7427154S
£4.038
Each (In a Box of 40)
Units
STAR-RING Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 814-9970
Mfr. Part No.7427154S
£5.40
Each
Units
STAR-RING Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 163-3529
Mfr. Part No.74275813
£3.195
Each (In a Box of 38)
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes 200Ω 24 x 24 x 39.2mm 8.5mm - 1 39.2mm 24mm
RS Stock No. 756-8685
Mfr. Part No.74271378
£12.58
Each
Units
WE-NCF Split Core Computers, Easy To Mount On Already Installed Cables Or Cables With Connecters, Interference Problems On Data Lines, Terminals 4W620 - - Yes 200Ω 59 x 35 x 44.6mm 7.8mm - 1 35mm 44.6mm
RS Stock No. 163-3990
Mfr. Part No.74271378
£11.437
Each (In a Tray of 16)
Units
WE-NCF Split Core - 4W620 - - Yes 200Ω 59 x 35 x 44.6mm 7.8mm - 1 35mm 44.6mm