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. 367-5304
Mfr. Part No.74271132
HK$44.51
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. 309-7962
Mfr. Part No.74271221
HK$49.46
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. 260-6543
Mfr. Part No.7427141
HK$35.98
Each
units
- Ring Core General Application 4 W 620 - - Yes 97 15.5 x 30 x 36mm 15mm - 1 15.5mm 30mm
RS Stock No. 163-5432
Mfr. Part No.74271221S
HK$51.43
Each (In a Box of 20)
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270 42.2 x 33.6 x 29.5mm 10.5mm - 1 33.6mm 29.5mm
RS Stock No. 815-0002
Mfr. Part No.74271221S
HK$53.85
Each
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270 42.2 x 33.6 x 29.5mm 10.5mm - 1 33.6mm 29.5mm
RS Stock No. 163-3201
Mfr. Part No.74271142
HK$37.57
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. 163-3204
Mfr. Part No.74271622S
HK$58.53
Each (In a Box of 20)
units
STAR-GAP STAR-GAP - 4W620 - - Yes 140Ω 31.5 x 35 x 28.3mm 13mm - 1 35mm 28.3mm
RS Stock No. 756-8395
Mfr. Part No.7427155
HK$58.79
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. 195-3888
Mfr. Part No.74272475
HK$138.411
Each (In a Tray of 48)
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. 168-3222
Mfr. Part No.74271251
HK$287.85
Each
units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 62 x 60 x 55 55mm - 1 60mm 55mm
RS Stock No. 163-8200
Mfr. Part No.74271211
HK$157.36
Each (In a Box of 20)
units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - Yes Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 162-1272
Mfr. Part No.74271722S
HK$57.85
Each (In a Box of 20)
units
STAR-FIX Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270Ω 35.1 x 31 x 28mm 12.5mm - 1 31mm 28mm
RS Stock No. 736-1914
Mfr. Part No.74275812
HK$39.19
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. 185-7114
Mfr. Part No.74272211
HK$130.472
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. 195-3889
Mfr. Part No.74272475
HK$184.48
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. 163-3988
Mfr. Part No.74271308
HK$35.039
Each (In a Tray of 36)
units
WE-NCF Split Core - 4W620 - - Yes 93Ω 29.8 x 20.1 x 13mm 7.8mm - 1 20.1mm 13mm
RS Stock No. 168-3183
Mfr. Part No.74271151
HK$94.30
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. 163-3990
Mfr. Part No.74271378
HK$120.134
Each (In a Tray of 16)
units
WE-NCF Split Core - 4W620 - - Yes 200Ω 59 x 35 x 44.6mm 7.8mm - 1 35mm 44.6mm
RS Stock No. 163-8201
Mfr. Part No.74271211S
HK$141.19
Each (In a Box of 20)
units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - Yes Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 163-3526
Mfr. Part No.74272722
HK$96.61
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