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. 163-3530
Mfr. Part No.74275815
£4.873
Each (In a Box of 30)
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes - 24 x 24 x 56.2mm 4.5 → 8.5mm - 1 56.2mm 24mm
RS Stock No. 736-1914
Mfr. Part No.74275812
£4.09
Each
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes 200Ω 19 x 19 x 30.3mm 2.5 → 5mm - 1 30.3mm 19mm
RS Stock No. 736-1911
Mfr. Part No.74275815
£5.67
Each
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes - 24 x 24 x 56.2mm 4.5 → 8.5mm - 1 56.2mm 24mm
RS Stock No. 170-3327
Mfr. Part No.ZCAT1730-0730A-BK
BrandTDK
£0.712
Each (In a Box of 840)
Units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 40Ω 16.5 Dia. x 30mm 7mm - 1 - 30mm
RS Stock No. 916-4318
Mfr. Part No.ZCAT1730-0730A-BK
BrandTDK
£1.494
Each (In a Pack of 5)
Units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 40Ω 16.5 Dia. x 30mm 7mm - 1 - 30mm
RS Stock No. 222-4365
Mfr. Part No.MSFC8-T
BrandRichco
£5.33
Each
Units
MSFC Cable Core EMI Suppression A5 - - Yes 195 19 x 20.8mm 8.5mm - 1 - 20.8mm
RS Stock No. 173-0002
Mfr. Part No.0443167251
BrandFair-Rite
£1.718
Each (In a Box of 196)
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes 225 22.1 x 11 x 32.3mm 10.15mm - 1 11mm 32.2mm
RS Stock No. 219-2656
Mfr. Part No.0443167251
BrandFair-Rite
£1.82
Each
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes 225 22.1 x 11 x 32.3mm 10.15mm - 1 11mm 32.2mm
RS Stock No. 222-4359
Mfr. Part No.MSFC6-T
BrandRichco
£5.35
Each
Units
MSFC Cable Core EMI Suppression A5 - - Yes 192 19 x 20.8mm 7mm - 1 - 20.8mm
RS Stock No. 923-6166
Mfr. Part No.74271211S
£15.42
Each
Units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - Yes Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 500-2972
Mfr. Part No.74271622S
£6.13
Each
Units
STAR-GAP STAR-GAP - 4W620 - - Yes 140Ω 31.5 x 35 x 28.3mm 13mm - 1 35mm 28.3mm
RS Stock No. 163-3204
Mfr. Part No.74271622S
£4.175
Each (In a Box of 20)
Units
STAR-GAP STAR-GAP - 4W620 - - Yes 140Ω 31.5 x 35 x 28.3mm 13mm - 1 35mm 28.3mm
RS Stock No. 163-8201
Mfr. Part No.74271211S
£11.192
Each (In a Box of 20)
Units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - Yes Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 466-9265
Mfr. Part No.0461167281
BrandFair-Rite
£2.12
Each
Units
- Round Cable Snap-Its EMI Suppression 61 Material - - Yes - 23.7 x 11.7 x 39.4mm 10.15mm - 1 11.7mm 39.4mm
RS Stock No. 173-0006
Mfr. Part No.0461167281
BrandFair-Rite
£1.975
Each (In a Box of 196)
Units
- Round Cable Snap-Its EMI Suppression 61 Material - - Yes - 23.7 x 11.7 x 39.4mm 10.15mm - 1 11.7mm 39.4mm
RS Stock No. 163-3993
Mfr. Part No.7427154
£4.253
Each (In a Box of 40)
Units
STAR-RING Split Core - 4W620 - No Yes 130Ω 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 484-1417
Mfr. Part No.0461164181
BrandFair-Rite
£4.29
Each
Units
- EMI Suppression - - - - Yes 205Ω 39.4 x 31 x 30.5mm 13mm 475Ω 1 39.4mm 30.5mm
RS Stock No. 162-1304
Mfr. Part No.74271318
£3.381
Each (In a Tray of 36)
Units
WE-NCF Split Core - 4W620 - - Yes 106Ω 19.4 x 16 x 8.2mm 8.2mm - 1 16mm 8.2mm
RS Stock No. 756-8673
Mfr. Part No.74271318
£3.72
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 106Ω 19.4 x 16 x 8.2mm 8.2mm - 1 16mm 8.2mm
RS Stock No. 173-0014
Mfr. Part No.0461164181
BrandFair-Rite
£4.04
Each (In a Box of 110)
Units
- EMI Suppression - - - - Yes 205Ω 39.4 x 31 x 30.5mm 13mm 475Ω 1 39.4mm 30.5mm