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. 309-7962
Mfr. Part No.74271221
£5.16
Each
Units
STAR-TEC STAR-TEC General Application 4 W 620 - No Yes 270Ω 33.6 x 29.5 x 37.7mm 13mm - - 33.6mm 29.5mm
RS Stock No. 367-5304
Mfr. Part No.74271132
£4.51
Each
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 241Ω 36.3 x 24.2 x 19.7mm 7.0 → 8.5mm - 1 24.2mm 19.7mm
RS Stock No. 309-7940
Mfr. Part No.74271131
£4.19
Each
Units
STAR-TEC STAR-TEC General Application 4 W 620 - No Yes 246Ω 24.2 x 36.4 x 20.1mm 9mm - - 24.6mm 20.1mm
RS Stock No. 367-5297
Mfr. Part No.74271112
£3.86
Each
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 321Ω 23.7 x 36.9 x 18.2mm 6.6mm - 1 36.9mm 18.2mm
RS Stock No. 367-5310
Mfr. Part No.74271222
£5.16
Each
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 265 42.2 x 28.8 x 33.5mm 13mm - 1 28.8mm 33.5mm
RS Stock No. 815-0021
Mfr. Part No.74271
£0.206
Each (In a Bag of 10)
Units
- Safety Key General Application - - - - - - - - - - -
RS Stock No. 736-1920
Mfr. Part No.74272733
£5.03
Each
Units
STAR-FIX Snap Ferrite EMI Suppression 8W5000 - No Yes - 18.2 x 21.7 x 35.1mm 8mm - 1 35.1mm 18.2mm
RS Stock No. 163-3527
Mfr. Part No.74272733
£3.528
Each (In a Box of 38)
Units
STAR-FIX Snap Ferrite EMI Suppression 8W5000 - No Yes - 18.2 x 21.7 x 35.1mm 8mm - 1 35.1mm 18.2mm
RS Stock No. 177-6022
Mfr. Part No.74271142
£2.587
Each (In a Box of 56)
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 321Ω 32.5 x 18.8 x 13.2mm 5.4mm - 1 18.8mm 13.2mm
RS Stock No. 367-5281
Mfr. Part No.74271142
£3.93
Each
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 321Ω 32.5 x 18.8 x 13.2mm 5.4mm - 1 18.8mm 13.2mm
RS Stock No. 163-3201
Mfr. Part No.74271142
£2.846
Each (In a Box of 42)
Units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 321Ω 32.5 x 18.8 x 13.2mm 5.4mm - 1 18.8mm 13.2mm
RS Stock No. 163-3994
Mfr. Part No.7427155
£5.321
Each (In a Box of 30)
Units
STAR-RING Split Core - 4W620 - No Yes 110Ω 55 x 20 x 44mm 27mm - 1 20mm 44mm
RS Stock No. 756-8395
Mfr. Part No.7427155
£6.13
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 - No Yes 110Ω 55 x 20 x 44mm 27mm - 1 20mm 44mm
RS Stock No. 736-1923
Mfr. Part No.74272722
£10.26
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. 163-3526
Mfr. Part No.74272722
£8.889
Each (In a Tray of 20)
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. 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. 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. 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. 177-6021
Mfr. Part No.74275812
£2.332
Each (In a Box of 56)
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. 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