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. 923-6163
Mfr. Part No.74271211
HK$147.43
Each
units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - No Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 169-6791
Mfr. Part No.ESD-SR-150
BrandKEMET
HK$18.952
Each (In a Box of 400)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 19.6 x 37.4 x 20.3mm 7mm - 1 37.4mm 20.3mm
RS Stock No. 177-6022
Mfr. Part No.74271142
HK$36.05
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. 123-2490
BrandRS PRO
HK$15.69
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 80 - Yes 130Ω 19.5 x 35 x 18mm 9mm - 1 35mm 18mm
RS Stock No. 162-0177
Mfr. Part No.B62152A0004X001
BrandEPCOS
HK$7.885
Each (In a Box of 1000)
units
B62152 Multi Aperture Core Broadband Transformers - - - - - 14.5 x 8.5 x 8.3mm 3.4mm - - 8.5mm 8.3mm
RS Stock No. 162-1304
Mfr. Part No.74271318
HK$36.044
Each (In a Tray of 36)
units
WE-NCF Split Core - 4W620 - - Yes 106Ω 19.4 x 16 x 8.2mm 8.2mm - 1 16mm 8.2mm
RS Stock No. 123-2498
BrandRS PRO
HK$23.795
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 80 - Yes 130Ω 30.5 Dia. x 39.5mm 13mm - 1 39.5mm -
RS Stock No. 169-6790
Mfr. Part No.ESD-SR-120
BrandKEMET
HK$11.074
Each (In a Box of 700)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 16 x 33 x 16.4mm 6mm - 1 33mm 16.4mm
RS Stock No. 774-0641
Mfr. Part No.ZCAT2035-0930A
BrandTDK
HK$19.13
Each
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 19.5 Dia. x 35mm 9mm - 1 20.5mm -
RS Stock No. 466-9158
Mfr. Part No.0431176451
BrandFair-Rite
HK$75.85
Each
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 380 38.6 x 19.15 x 47.5mm 18.35mm - 1 19.15mm 47.5mm
RS Stock No. 163-3994
Mfr. Part No.7427155
HK$57.85
Each (In a Box of 30)
units
STAR-RING Split Core - 4W620 - No Yes 110Ω 55 x 20 x 44mm 27mm - 1 20mm 44mm
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