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. 811-9115
Mfr. Part No.ESD-SR-150
BrandKEMET
MYR15.19
Each
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 19.6 x 37.4 x 20.3mm 7mm - 1 37.4mm 20.3mm
RS Stock No. 814-3436
Mfr. Part No.432703021221
BrandFERROXCUBE
MYR4.074
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. 466-9136
Mfr. Part No.0431173551
BrandFair-Rite
MYR29.32
Each
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 220 29.2 x 14.7 x 42mm 18.8mm - 1 14.7mm 42mm
RS Stock No. 162-1304
Mfr. Part No.74271318
MYR18.564
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. 756-8682
Mfr. Part No.74271358
MYR42.39
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. 736-1917
Mfr. Part No.74275813
MYR23.12
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. 123-2484
BrandRS PRO
MYR8.76
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 40 - Yes 75Ω 14 Dia. x 22mm 7mm - 1 22mm -
RS Stock No. 168-3209
Mfr. Part No.74271151S
MYR55.63
Each
units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 49 x 39 x 35 35mm - 1 39mm 35mm
RS Stock No. 222-4337
Mfr. Part No.MSFC4-T
BrandRichco
MYR44.38
Each
units
MSFC Cable Core EMI Suppression A5 Material - - Yes 139 13.2 x 14.3mm 5mm - 1 - 14.3mm