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. 741-3068
Mfr. Part No.ZCAT3035-1330
BrandTDK
TWD172.00
Each
units
ZCAT Bead EMC Absorption 30 Material - - - - 34 Dia. x 39mm 13mm - 1 30mm -
RS Stock No. 123-2493
BrandRS PRO
TWD41.50
Each (In a Pack of 2)
units
- Clamp Filter Computer Peripherals, Digital TV, Internal & External Power Cables, Monitors, Printers Ferrite 35 - Yes 75Ω 24.5 Dia. x 28.5mm 10.2mm - 1 28.5mm -
RS Stock No. 109-4160
Mfr. Part No.ZCAT3035-1330
BrandTDK
TWD92.30
Each (On a Reel of 200)
units
ZCAT Bead EMC Absorption 30 Material - - - - 34 Dia. x 39mm 13mm - 1 30mm -
RS Stock No. 172-9999
Mfr. Part No.0431164281
BrandFair-Rite
TWD66.20
Each (In a Box of 196)
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 310 20 x 9.8 x 39.4mm 6.6mm - 1 9.8mm 39.4mm
RS Stock No. 466-9091
Mfr. Part No.0431164281
BrandFair-Rite
TWD153.00
Each
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 310 20 x 9.8 x 39.4mm 6.6mm - 1 9.8mm 39.4mm
RS Stock No. 814-9998
Mfr. Part No.74271111
TWD174.00
Each
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 320 40.5 x 23.7 x 18.2mm - - 1 23.7mm 18.2mm
RS Stock No. 163-5426
Mfr. Part No.74271111
TWD144.50
Each (In a Box of 38)
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 320 40.5 x 23.7 x 18.2mm - - 1 23.7mm 18.2mm
RS Stock No. 109-4164
Mfr. Part No.ZCAT1730-0730A
BrandTDK
TWD31.80
Each (On a Reel of 840)
units
ZCAT Ferrite Core USB 30 Material - - Yes - 23 Dia. x 30mm 7mm - 1 16.5mm 17.4mm
RS Stock No. 774-0639
Mfr. Part No.ZCAT1730-0730A
BrandTDK
TWD79.00
Each
units
ZCAT Ferrite Core USB 30 Material - - Yes - 23 Dia. x 30mm 7mm - 1 16.5mm 17.4mm
RS Stock No. 170-3332
Mfr. Part No.ZCAT2436-1330A-BK
BrandTDK
TWD68.20
Each (In a Box of 400)
units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 30Ω 23.5 Dia. x 36mm 13mm - 1 - 36mm
RS Stock No. 916-4333
Mfr. Part No.ZCAT2436-1330A-BK
BrandTDK
TWD123.00
Each (In a Pack of 2)
units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 30Ω 23.5 Dia. x 36mm 13mm - 1 - 36mm
RS Stock No. 163-5439
Mfr. Part No.74271733
TWD116.70
Each (In a Box of 38)
units
STAR-FIX Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 246Ω 35.1 x 21.7 x 18.2mm 8mm - 1 21.7mm 18.2mm
RS Stock No. 815-0015
Mfr. Part No.74271733
TWD139.00
Each
units
STAR-FIX Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 246Ω 35.1 x 21.7 x 18.2mm 8mm - 1 21.7mm 18.2mm
RS Stock No. 109-4166
Mfr. Part No.ZCAT2132-1130
BrandTDK
TWD46.10
Each (On a Reel of 480)
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 36 Dia x 32mm 11mm - 1 32mm 22mm
RS Stock No. 774-0645
Mfr. Part No.ZCAT2132-1130
BrandTDK
TWD112.00
Each
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 36 Dia x 32 mm 11mm - 1 32mm 22mm
RS Stock No. 815-0021
Mfr. Part No.74271
TWD10.50
Each (In a Bag of 10)
units
- Safety Key General Application - - - - - - - - - - -
RS Stock No. 170-3333
Mfr. Part No.ZCAT3035-1330-BK
BrandTDK
TWD97.00
Each (In a Box of 200)
units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 80Ω 30 Dia. x 39mm 13mm - 1 - 39mm
RS Stock No. 170-3329
Mfr. Part No.ZCAT2132-1130-BK
BrandTDK
TWD50.20
Each (In a Box of 480)
units
ZCAT Clamp Filter Audio Equipment, Copiers, Digital Telephones, Electronic Musical Instruments, Facsimiles, HDDs, Monitors, PCs, Video Games, Word Processors - - - Yes 40Ω 20.5 Dia. x 36mm 11mm - 1 - 36mm
RS Stock No. 163-3204
Mfr. Part No.74271622S
TWD232.00
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. 109-4162
Mfr. Part No.ZCAT1325-0530A
BrandTDK
TWD18.30
Each (On a Reel of 1344)
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 20 Dia. x 25mm 5mm - 1 12.8mm 11.2mm