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. 151-2738
Mfr. Part No.475167281
BrandFair-Rite
£7.924
Each (In a Tray of 225)
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.5 x 23 x 23.4mm 10.15mm - 1 23mm 23.4mm
RS Stock No. 168-3184
Mfr. Part No.74271151S
£8.203
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. 168-3209
Mfr. Part No.74271151S
£10.84
Each
Units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 49 x 39 x 35 35mm - 1 39mm 35mm
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. 185-7450
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. 168-3222
Mfr. Part No.74271251
£29.89
Each
Units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 62 x 60 x 55 55mm - 1 60mm 55mm
RS Stock No. 151-2798
Mfr. Part No.475176451
BrandFair-Rite
£19.68
Each
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 47.5 x 38.5 x 38.3mm 18.7mm - 1 38.5mm 38.3mm
RS Stock No. 185-7111
Mfr. Part No.74272221
£4.798
Each (In a Tray of 26)
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. 168-3191
Mfr. Part No.74271251S
£29.89
Each
Units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 62 x 60 x 55 55mm - 1 60mm 55mm
RS Stock No. 151-2741
Mfr. Part No.475176451
BrandFair-Rite
£15.682
Each (In a Tray of 29)
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 47.5 x 38.5 x 38.3mm 18.7mm - 1 38.5mm 38.3mm
RS Stock No. 195-3890
Mfr. Part No.7427151S
£3.88
Each (In a Tray of 80)
Units
STAR-RING Snap Ferrite Computer Data and Power Cable, Mounting on Circuit Boards 4 W 620 - Yes Yes - 40 x 20 x 30mm 14.5mm - 1 20mm 30mm
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. 185-7328
Mfr. Part No.74272251
£19.86
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 - - 62 x 60 x 55mm 22 → 25mm - 1 62mm 55mm
RS Stock No. 185-7114
Mfr. Part No.74272211
£13.162
Each (In a Tray of 20)
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 - - 56 x 47 x 43mm 17 → 21mm - 1 56mm 43mm
RS Stock No. 185-7319
Mfr. Part No.74272131
£3.71
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 - - 40 x 24 x 20mm 6 → 7.5mm - 1 40mm 20mm
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
RS Stock No. 185-7535
Mfr. Part No.74272211
£19.63
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 - - 56 x 47 x 43mm 17 → 21mm - 1 56mm 43mm
RS Stock No. 151-2737
Mfr. Part No.475178281
BrandFair-Rite
£5.762
Each (In a Tray of 225)
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.4 x 21 x 21mm 9mm - 1 21mm 21mm
RS Stock No. 151-2785
Mfr. Part No.475178281
BrandFair-Rite
£6.63
Each
Units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.4 x 21 x 21mm 9mm - 1 21mm 21mm
RS Stock No. 185-7112
Mfr. Part No.74272222
£5.165
Each (In a Tray of 26)
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