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. 169-6789
Mfr. Part No.ESD-SR-100
BrandKEMET
TWD35.70
Each (In a Box of 900)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 16.5 x 21 x 16.5mm 6mm - 1 21mm 16.5mm
RS Stock No. 756-8395
Mfr. Part No.7427155
TWD240.00
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. 177-6025
Mfr. Part No.74271142S
TWD142.80
Each (In a Box of 56)
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 182 32.5 x 18.8 x 13.2mm 5mm - 1 18.8mm 13.2mm
RS Stock No. 309-7940
Mfr. Part No.74271131
TWD164.00
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. 123-2496
BrandRS PRO
TWD93.50
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
RS Stock No. 136-8976
BrandRS PRO
TWD171.10
Each (In a Tray of 120)
units
- Ferrite Sleeve EMI Suppression Manganese-Zinc 128 - - 268Ω - 13mm - - - 28.5mm
RS Stock No. 466-9085
Mfr. Part No.0431164181
BrandFair-Rite
TWD131.00
Each
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 260 31 x 15.25 x 39.4mm 13.05mm - 1 15.25mm 39.4mm
RS Stock No. 163-5432
Mfr. Part No.74271221S
TWD209.80
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. 741-3074
Mfr. Part No.ZCAT6819-5230D
BrandTDK
TWD192.00
Each
units
ZCAT Bead EMC Absorption 30 Material - - - - 18.5 Dia. x 67.5mm 52mm - 1 16mm -
RS Stock No. 169-6794
Mfr. Part No.ESD-SR-160
BrandKEMET
TWD65.80
Each (In a Box of 400)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 20.2 x 39 x 20mm 9mm - 1 39mm 20mm
RS Stock No. 168-3191
Mfr. Part No.74271251S
TWD1,140.00
Each
units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 62 x 60 x 55 55mm - 1 60mm 55mm
RS Stock No. 814-3382
Mfr. Part No.432703021311
BrandFERROXCUBE
TWD113.00
Each
units
- Cable Shield EMI Suppression 4S2 Material - - - - 25.9 Dia. x 28.6mm 12.8mm - 1 - 28.6mm
RS Stock No. 151-2785
Mfr. Part No.475178281
BrandFair-Rite
TWD263.00
Each
units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.4 x 21 x 21mm 9mm - 1 21mm 21mm
RS Stock No. 736-1911
Mfr. Part No.74275815
TWD221.00
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. 151-2794
Mfr. Part No.475164181
BrandFair-Rite
TWD474.00
Each
units
04 Round Cable Snap-Its EMI Suppression 75 Material - - Yes - 39.5 x 30 x 31mm 13.05mm - 1 30mm 31mm
RS Stock No. 814-3411
Mfr. Part No.432703021381
BrandFERROXCUBE
TWD12.00
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. 123-2480
BrandRS PRO
TWD53.50
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 70 - Yes 120Ω 16.5 Dia. x 29.5mm 5.2mm - 1 29.5 -
RS Stock No. 169-6797
Mfr. Part No.ESD-SR-S10
BrandKEMET
TWD34.90
Each (In a Box of 800)
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 15.5 x 18.5 x 14mm 6mm - 1 18.5mm 14mm
RS Stock No. 168-3184
Mfr. Part No.74271151S
TWD384.80
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. 756-8682
Mfr. Part No.74271358
TWD354.00
Each
units
WE-NCF Split Core Computers, Easy To Mount On Already Installed Cables Or Cables With Connecters, Interference Problems On Data Lines, Terminals 4W620 - - Yes 98Ω 60 x 45.5 x 15mm 26.5mm - 1 45.5mm 15mm