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. 169-6796
Mfr. Part No.ESD-SR-250H
BrandKEMET
£5.39
Each (In a Box of 60)
Units
ESD-SR Snap-on Cores Snap Ferrite Round Cable Nickel Zinc - - Yes - 30 x 42 x 30mm 13mm - 1 42mm 30mm
RS Stock No. 811-9130
Mfr. Part No.ESD-SR-250H
BrandKEMET
£7.30
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Round Cable Nickel Zinc - - Yes - 30 x 42 x 30mm 13mm - 1 42mm 30mm
RS Stock No. 741-3062
Mfr. Part No.ZCAT3618-2630D
BrandTDK
£2.20
Each
Units
ZCAT Bead EMC Absorption 30 Material - - - - 17.5 Dia. x 33.5mm 26mm - 1 11.5mm -
RS Stock No. 169-6798
Mfr. Part No.ESD-SR-S16
BrandKEMET
£1.18
Each (In a Box of 280)
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 23 x 20.5 x 20mm 8mm - 1 20.5mm 20mm
RS Stock No. 916-4336
Mfr. Part No.ZCAT3035-1330-BK
BrandTDK
£3.885
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 80Ω 30 Dia. x 39mm 13mm - 1 - 39mm
RS Stock No. 170-3333
Mfr. Part No.ZCAT3035-1330-BK
BrandTDK
£2.205
Each (In a Box of 200)
Units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 80Ω 30 Dia. x 39mm 13mm - 1 - 39mm
RS Stock No. 109-4159
Mfr. Part No.ZCAT3618-2630D
BrandTDK
£1.102
Each (On a Reel of 480)
Units
ZCAT Bead EMC Absorption 30 Material - - - - 17.5 Dia. x 33.5mm 26mm - 1 11.5mm -
RS Stock No. 811-9137
Mfr. Part No.ESD-SR-S16
BrandKEMET
£2.22
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 23 x 20.5 x 20mm 8mm - 1 20.5mm 20mm
RS Stock No. 736-1917
Mfr. Part No.74275813
£4.72
Each
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. 169-6800
Mfr. Part No.ESD-SR-S25
BrandKEMET
£1.28
Each (In a Box of 200)
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 33 x 15.5 x 29mm 14.5mm - 1 15.5mm 29mm
RS Stock No. 811-9146
Mfr. Part No.ESD-SR-S25
BrandKEMET
£2.10
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 33 x 15.5 x 29mm 14.5mm - 1 15.5mm 29mm
RS Stock No. 165-3128
Mfr. Part No.ZCAT12V-BK
BrandTDK
£3.18
Each (In a Box of 120)
Units
ZCAT Cable Core Automotive ECUs - - - - - 27.5 x 34.6 x 27mm 12mm - 1 34.6mm 27mm
RS Stock No. 261-9117
Mfr. Part No.RICB 26 13 28
BrandRichco
£0.99
Each
Units
RICB Shrink VE/CD Ferrite - - - - 26 Dia. x 28.5mm - - - - 28.5mm
RS Stock No. 756-8679
Mfr. Part No.74271308
£3.52
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 93Ω 29.8 x 20.1 x 13mm 7.8mm - 1 20.1mm 13mm
RS Stock No. 163-3988
Mfr. Part No.74271308
£3.118
Each (In a Tray of 36)
Units
WE-NCF Split Core - 4W620 - - Yes 93Ω 29.8 x 20.1 x 13mm 7.8mm - 1 20.1mm 13mm
RS Stock No. 814-3436
Mfr. Part No.432703021221
BrandFERROXCUBE
£0.572
Each (In a Bag of 5)
Units
- Cable Shield EMI Suppression 4S2 Material - - - - 14.3 Dia. x 28.6mm 7.25mm - 1 - 28.6mm
RS Stock No. 831-9504
Mfr. Part No.ZCAT12V-BK
BrandTDK
£4.67
Each
Units
ZCAT Cable Core Automotive ECUs - - - - - 27.5 x 34.6 x 27mm 12mm - 1 34.6mm 27mm
RS Stock No. 811-9121
Mfr. Part No.ESD-SR-250
BrandKEMET
£5.27
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 31.5 x 38 x 31.6mm 13mm - 1 38mm 31.6mm
RS Stock No. 163-5440
Mfr. Part No.74271733S
£2.607
Each (In a Box of 38)
Units
STAR-FIX Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 246Ω 35.1 x 21.7 x 18.2mm 8mm - 1 21.7mm 18.2mm
RS Stock No. 169-6793
Mfr. Part No.ESD-SR-250
BrandKEMET
£3.87
Each (In a Box of 60)
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 31.5 x 38 x 31.6mm 13mm - 1 38mm 31.6mm