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. 185-7115
Mfr. Part No.74272251
£12.711
Each (In a Tray of 12)
Units
STAR-TEC Snap Ferrite Especially for Applications in the Low Frequency Range from 300 kHz to 30 Mhz, Perfect for Applications with Varying Cable Diameter, Reusable because of the Key Technology Therefore Perfect for Test and Measuring Purposes and Cables with Difficult Access, Suppression of Electronic Ballasts (i.e. Neon Tube) in the Lighting Industry Manganese-Zinc (Coating) - Yes - - 62 x 60 x 55mm 22 → 25mm - 1 62mm 55mm
RS Stock No. 185-7113
Mfr. Part No.74272151
£4.601
Each (In a Tray of 24)
Units
STAR-TEC Snap Ferrite Especially for Applications in the Low Frequency Range from 300 kHz to 30 Mhz, Perfect for Applications with Varying Cable Diameter, Reusable because of the Key Technology Therefore Perfect for Test and Measuring Purposes and Cables with Difficult Access, Suppression of Electronic Ballasts (i.e. Neon Tube) in the Lighting Industry Manganese-Zinc (Coating) - Yes - - 49 x 39 x 35mm 12 → 15mm - 1 49mm 35mm
RS Stock No. 185-7410
Mfr. Part No.74272221
£6.82
Each
Units
STAR-TEC Snap Ferrite Especially for Applications in the Low Frequency Range from 300 kHz to 30 Mhz, Perfect for Applications with Varying Cable Diameter, Reusable because of the Key Technology Therefore Perfect for Test and Measuring Purposes and Cables with Difficult Access, Suppression of Electronic Ballasts (i.e. Neon Tube) in the Lighting Industry Manganese-Zinc (Coating) - Yes - - 41.6 x 33.5 x 28.4mm 8.5 → 10.5mm - 1 41.6mm 28.4mm
RS Stock No. 185-7450
Mfr. Part No.74272222
£6.82
Each
Units
STAR-TEC Snap Ferrite Especially for Applications in the Low Frequency Range from 300 kHz to 30 Mhz, Perfect for Applications with Varying Cable Diameter, Reusable because of the Key Technology Therefore Perfect for Test and Measuring Purposes and Cables with Difficult Access, Suppression of Electronic Ballasts (i.e. Neon Tube) in the Lighting Industry Manganese-Zinc (Coating) - Yes - - 41.6 x 33.5 x 28.4mm 10.5 → 12.5mm - 1 41.6mm 28.4mm
RS Stock No. 151-2794
Mfr. Part No.475164181
BrandFair-Rite
£12.63
Each
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.5 x 30 x 31mm 13.05mm - 1 30mm 31mm
RS Stock No. 168-3183
Mfr. Part No.74271151
£7.958
Each (In a Box of 24)
Units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 49 x 39 x 35 35mm - 1 39mm 35mm
RS Stock No. 151-2796
Mfr. Part No.475181651
BrandFair-Rite
£5.09
Each
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 23 x 13 x 12.1mm 5.1mm - 1 13mm 12.1mm
RS Stock No. 195-3889
Mfr. Part No.74272475
£16.05
Each
Units
STAR-FLAT Snap Ferrite Computer, Medical Technology, Ribbon Cable 4 W 620 - Yes Yes - 84.5 x 19.6 x 16mm 1.27mm - 1 19.6mm 16mm
RS Stock No. 151-2789
Mfr. Part No.475167281
BrandFair-Rite
£11.78
Each
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.5 x 23 x 23.4mm 10.15mm - 1 23mm 23.4mm