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. 736-1923
Mfr. Part No.74272722
HK$98.32
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. 222-4393
Mfr. Part No.MTFC 16816-T
BrandRichco
HK$52.18
Each
units
MTFC Toroid Core Computer Peripherals Ferrite - - Yes 127 19.2 Dia. x 20.6mm 7.6mm - 1 - 20.6mm
RS Stock No. 815-0009
Mfr. Part No.74271132S
HK$41.05
Each
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 241Ω 40.5 x 24.5 x 21mm - - 1 24.5mm 21mm
RS Stock No. 109-4163
Mfr. Part No.ZCAT1518-0730
BrandTDK
HK$5.583
Each (On a Reel of 896)
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 15 Dia. X 18mm 7mm - 1 15mm -
RS Stock No. 109-4160
Mfr. Part No.ZCAT3035-1330
BrandTDK
HK$22.762
Each (On a Reel of 200)
units
ZCAT Bead EMC Absorption 30 Material - - - - 34 Dia. x 39mm 13mm - 1 30mm -
RS Stock No. 136-9030
BrandRS PRO
HK$17.164
Each (In a Pack of 5)
units
- Ferrite Sleeve Suppress High Frequency Noise - 75Ω - - 140Ω 10.5 Dia. x 20mm 10.5mm - 1 - -
RS Stock No. 136-9029
BrandRS PRO
HK$20.664
Each (In a Pack of 5)
units
- - - - - - - 200Ω - - - - - -
RS Stock No. 168-3194
Mfr. Part No.74271151
HK$117.57
Each
units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 49 x 39 x 35 35mm - 1 39mm 35mm
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. 814-3394
Mfr. Part No.432703021201
BrandFERROXCUBE
HK$7.528
Each (In a Bag of 5)
units
- Cable Shield EMI Suppression 4S2 Material - - - - 14.3 Dia. x 28.6mm 6.35mm - 1 - 28.6mm
RS Stock No. 163-5430
Mfr. Part No.74271132S
HK$43.806
Each (In a Box of 38)
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 241Ω 40.5 x 24.5 x 21mm - - 1 24.5mm 21mm
RS Stock No. 736-1914
Mfr. Part No.74275812
HK$40.37
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. 169-6800
Mfr. Part No.ESD-SR-S25
BrandKEMET
HK$13.167
Each (In a Box of 200)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 33 x 15.5 x 29mm 14.5mm - 1 15.5mm 29mm
RS Stock No. 466-9186
Mfr. Part No.0443800506
BrandFair-Rite
HK$12.93
Each
units
- Round Cable Core Suppression Components Nylon 66 - - Yes - 29.7 x 15.6 x 25.4mm 12.8mm - 1 15.6mm 25.4mm
RS Stock No. 814-3411
Mfr. Part No.432703021381
BrandFERROXCUBE
HK$3.058
Each (In a Bag of 5)
units
- Cable Shield EMI Suppression 4S2 Material - - - - 9.5 Dia. x 19.05mm 4.75mm - 1 - 19.05mm
RS Stock No. 173-0018
Mfr. Part No.0431177081
BrandFair-Rite
HK$256.753
Each (In a Box of 36)
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 375 56.4 x 27.45 x 42.95mm 25.65mm - 1 27.45mm 42.95mm
RS Stock No. 116-1471
Mfr. Part No.11.05.1006
BrandRotronic
HK$35.34
Each
units
EMV - - - - - - 200 - - - - - -
RS Stock No. 123-2485
BrandRS PRO
HK$11.38
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 80 - Yes 135Ω 17 x 30 x 15mm 7mm - 1 30mm 15mm
RS Stock No. 185-7492
Mfr. Part No.74272151
HK$79.15
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 - - 49 x 39 x 35mm 12 → 15mm - 1 49mm 35mm
RS Stock No. 123-2496
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 105 - Yes 170Ω 31.5 x 33 x 30mm 13mm - 1 33mm 30mm