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. 136-9028
BrandRS PRO
TWD189.00
Each
units
- - - - - - - 268Ω - - - - - -
RS Stock No. 173-0002
Mfr. Part No.0443167251
BrandFair-Rite
TWD138.50
Each (In a Box of 196)
units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes 225 22.1 x 11 x 32.3mm 10.15mm - 1 11mm 32.2mm
RS Stock No. 774-0648
Mfr. Part No.ZCAT2436-1330A
BrandTDK
TWD138.00
Each
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 28 Dia. x 35mm 13mm - 1 19.5mm 17.4mm
RS Stock No. 136-9029
BrandRS PRO
TWD89.40
Each (In a Pack of 5)
units
- - - - - - - 200Ω - - - - - -
RS Stock No. 169-6790
Mfr. Part No.ESD-SR-120
BrandKEMET
TWD45.00
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. 171-0801
Mfr. Part No.432703021311
BrandFERROXCUBE
TWD88.10
Each (On a Reel of 128)
units
- Cable Shield EMI Suppression 4S2 Material - - - - - - - - - -
RS Stock No. 814-3394
Mfr. Part No.432703021201
BrandFERROXCUBE
TWD29.80
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. 163-3990
Mfr. Part No.74271378
TWD516.20
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. 163-3529
Mfr. Part No.74275813
TWD181.90
Each (In a Box of 38)
units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes 200Ω 24 x 24 x 39.2mm 8.5mm - 1 39.2mm 24mm
RS Stock No. 212-0617
Mfr. Part No.B62152A0004X030
BrandEPCOS
TWD36.20
Each (In a Pack of 5)
units
B62152 Double Aperture Core Broadband Transformers N30 - - - - 14.5 x 8.5 x 8.3mm 3.4mm - 2 8.5mm 8.3mm
RS Stock No. 811-9121
Mfr. Part No.ESD-SR-250
BrandKEMET
TWD233.00
Each
units
ESD-SR Snap-on Cores Snap Ferrite Consumer Electronics Ferrite - - Yes - 31.5 x 38 x 31.6mm 13mm - 1 38mm 31.6mm
RS Stock No. 123-2479
BrandRS PRO
TWD57.00
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 55 - Yes 95Ω 15 Dia. x 25.2mm 4mm - 1 25.2 -
RS Stock No. 756-8386
Mfr. Part No.7427154
TWD214.00
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 130Ω 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 222-4365
Mfr. Part No.MSFC8-T
BrandRichco
TWD241.00
Each
units
MSFC Cable Core EMI Suppression A5 - - Yes 195 19 x 20.8mm 8.5mm - 1 - 20.8mm
RS Stock No. 484-1417
Mfr. Part No.0461164181
BrandFair-Rite
TWD169.00
Each
units
- EMI Suppression - - - - Yes 205Ω 39.4 x 31 x 30.5mm 13mm 475Ω 1 39.4mm 30.5mm
RS Stock No. 167-8217
Mfr. Part No.B62152A0007X001
BrandEPCOS
TWD16.60
Each (In a Box of 2000)
units
B62152 Double Aperture Core Broadband Transformers - - - - - 7.25 x 4.2 x 6.2mm 1.7mm - 2 4.2mm 6.2mm
RS Stock No. 177-6022
Mfr. Part No.74271142
TWD142.80
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. 815-0009
Mfr. Part No.74271132S
TWD176.00
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. 163-3530
Mfr. Part No.74275815
TWD218.20
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. 168-3183
Mfr. Part No.74271151
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