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. 172-9998
Mfr. Part No.0431167281
BrandFair-Rite
£1.402
Each (In a Box of 196)
Units
- Round Cable Snap-Its EMI Suppression 31 Material 144Ω No Yes 240Ω 23.7 x 11.7 x 39.4mm 10.15mm - 1 11.7mm 39.4mm
RS Stock No. 172-9999
Mfr. Part No.0431164281
BrandFair-Rite
£1.47
Each (In a Box of 196)
Units
- Round Cable Snap-Its EMI Suppression 31 Material 180Ω No Yes 310Ω 20 x 9.8 x 39.4mm 6.6mm - 1 9.8mm 39.4mm
RS Stock No. 466-9091
Mfr. Part No.0431164281
BrandFair-Rite
£1.68
Each
Units
- Round Cable Snap-Its EMI Suppression 31 Material 225Ω No Yes 380Ω 20 x 9.8 x 39.4mm 6.6mm - 1 9.8mm 39.4mm
RS Stock No. 466-9158
Mfr. Part No.0431176451
BrandFair-Rite
£7.91
Each
Units
- Round Cable Snap-Its EMI Suppression 31 Material 125Ω No Yes 210Ω 38.6 x 19.15 x 47.5mm 18.35mm - 1 19.15mm 47.5mm
RS Stock No. 756-8395
Mfr. Part No.7427155
£6.25
Each
Units
STAR-RING Split Core For Mounting On Circuit Boards Midget Blind Rivet, Internal and External Computer Data and Power Cable, Perfect For Cables With Difficult Access Because Of Easy Installation and Removal 4W620 55Ω Yes Yes 110Ω 55 x 20 x 44mm 27mm - 1 20mm 44mm
RS Stock No. 173-0017
Mfr. Part No.0431176451
BrandFair-Rite
£7.336
Each (In a Box of 60)
Units
- Round Cable Snap-Its EMI Suppression 31 Material 218Ω No Yes 375Ω 38.6 x 19.15 x 47.5mm 18.35mm - 1 19.15mm 47.5mm
RS Stock No. 163-3994
Mfr. Part No.7427155
£5.321
Each (In a Box of 30)
Units
STAR-RING Split Core Computer Data and Power Cable, Mounting on Circuit Boards 4W620 156Ω No Yes 260Ω 55 x 20 x 44mm 27mm - 1 20mm 44mm
RS Stock No. 163-3526
Mfr. Part No.74272722
£8.889
Each (In a Tray of 20)
Units
STAR-FIX Snap Ferrite EMI Suppression 8W5000 55Ω No Yes 110Ω 28 x 31 x 35.1mm 12.5mm - 1 35.1mm 28mm
RS Stock No. 736-1923
Mfr. Part No.74272722
£10.47
Each
Units
STAR-FIX Snap Ferrite EMI Suppression 8W5000 - No Yes - 28 x 31 x 35.1mm 12.5mm - 1 35.1mm 28mm
RS Stock No. 811-9109
Mfr. Part No.ESD-SR-100
BrandKEMET
£1.52
Each
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite 30Ω No Yes 80Ω 16.5 x 21 x 16.5mm 6mm - 1 21mm 16.5mm
RS Stock No. 169-6789
Mfr. Part No.ESD-SR-100
BrandKEMET
£0.749
Each (In a Box of 900)
Units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - No Yes - 16.5 x 21 x 16.5mm 6mm - 1 21mm 16.5mm
RS Stock No. 466-9136
Mfr. Part No.0431173551
BrandFair-Rite
£3.60
Each
Units
- Round Cable Snap-Its EMI Suppression 31 Material 156Ω No Yes 260Ω 29.2 x 14.7 x 42mm 18.8mm - 1 14.7mm 42mm
RS Stock No. 173-0012
Mfr. Part No.0431173551
BrandFair-Rite
£3.324
Each (In a Box of 110)
Units
- Round Cable Snap-Its EMI Suppression 31 Material 125Ω No Yes 220Ω 29.2 x 14.7 x 42mm 18.8mm - 1 14.7mm 42mm
RS Stock No. 172-9997
Mfr. Part No.0443164251
BrandFair-Rite
£1.275
Each (In a Box of 196)
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material 163Ω No Yes 275Ω 17.9 x 9.2 x 32.2mm 6.6mm - 1 9.2mm 32.2mm
RS Stock No. 219-2640
Mfr. Part No.0443164251
BrandFair-Rite
£1.52
Each
Units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material 169Ω No Yes 280Ω 17.9 x 9.2 x 32.2mm 6.6mm - 1 9.2mm 32.2mm
RS Stock No. 116-1471
Mfr. Part No.11.05.1006
BrandRotronic
£3.27
Each
Units
EMV - Computer Peripherals Ferrite 120Ω No Yes 200Ω 32 ´ 19.5mm 6.5mm - 1 - -
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 223Ω No Yes 417Ω 24 x 24 x 56.2mm 8.5mm - 1 56.2mm 24mm
RS Stock No. 736-1911
Mfr. Part No.74275815
£5.78
Each
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 180Ω No Yes 350Ω 24 x 24 x 56.2mm 8.5mm - 1 56.2mm 24mm
RS Stock No. 177-6021
Mfr. Part No.74275812
£2.332
Each (In a Box of 56)
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 42Ω No Yes 114Ω 19 x 19 x 30.3mm 5mm - 1 30.3mm 19mm
RS Stock No. 736-1914
Mfr. Part No.74275812
£4.17
Each
Units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 125Ω No Yes 200Ω 19 x 19 x 30.3mm 5mm - 1 30.3mm 19mm