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. 169-6796
Mfr. Part No.ESD-SR-250H
BrandKEMET
HK$59.936
Each (In a Box of 60)
units
ESD-SR Snap-on Cores Snap Ferrite Round Cable Nickel Zinc - - Yes - 30 x 42 x 30mm 13mm - 1 42mm 30mm
RS Stock No. 163-8201
Mfr. Part No.74271211S
HK$141.19
Each (In a Box of 20)
units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - Yes Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 136-8976
BrandRS PRO
HK$44.616
Each (In a Tray of 120)
units
- Ferrite Sleeve EMI Suppression Manganese-Zinc 128 - - 268Ω - 13mm - - - 28.5mm
RS Stock No. 172-9999
Mfr. Part No.0431164281
BrandFair-Rite
HK$26.972
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. 916-4324
Mfr. Part No.ZCAT2235-1030A-BK
BrandTDK
HK$23.98
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 50Ω 21.5 Dia. x 35mm 10mm - 1 - 35mm
RS Stock No. 466-9215
Mfr. Part No.0444164951
BrandFair-Rite
HK$13.31
Each
units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes - 17.3 x 8.4 x 36.2mm 5.1mm - 1 8.4mm 36.2mm
RS Stock No. 814-9995
Mfr. Part No.74271111S
HK$44.87
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. 222-4365
Mfr. Part No.MSFC8-T
BrandRichco
HK$61.27
Each
units
MSFC Cable Core EMI Suppression A5 - - Yes 195 19 x 20.8mm 8.5mm - 1 - 20.8mm
RS Stock No. 815-0021
Mfr. Part No.74271
HK$2.018
Each (In a Bag of 10)
units
- Safety Key General Application - - - - - - - - - - -
RS Stock No. 109-4166
Mfr. Part No.ZCAT2132-1130
BrandTDK
HK$11.55
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. 815-0018
Mfr. Part No.74271222S
HK$52.28
Each
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 265Ω 42.2 x 33.5 x 28.8mm 12.5mm - 1 33.5mm 28.8mm
RS Stock No. 163-5438
Mfr. Part No.74271722
HK$40.081
Each (In a Box of 20)
units
- Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270Ω 35.1 x 31 x 28mm 12.5mm - 1 31mm 28mm
RS Stock No. 162-1274
Mfr. Part No.74271633S
HK$28.931
Each (In a Box of 38)
units
STAR-GAP STAR-GAP General Application 4W620 - - Yes - 21.7 x 35.1 x 19mm - - 1 35.1mm 19mm
RS Stock No. 163-5439
Mfr. Part No.74271733
HK$24.994
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. 815-0024
Mfr. Part No.74271722S
HK$66.46
Each
units
STAR-FIX Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270Ω 35.1 x 31 x 28mm 12.5mm - 1 31mm 28mm
RS Stock No. 136-9024
BrandRS PRO
HK$7.701
Each (In a Pack of 10)
units
- EMI Suppression EMI Suppression - 130 - - 213Ω 12 (Dia.) x 30mm 5.3mm - 1 30mm -
RS Stock No. 172-9998
Mfr. Part No.0431167281
BrandFair-Rite
HK$25.727
Each (In a Box of 196)
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 240 23.7 x 11.7 x 39.4mm 10.15mm - 1 11.7mm 39.4mm
RS Stock No. 815-0011
Mfr. Part No.74271722
HK$42.79
Each
units
- Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 270Ω 35.1 x 31 x 28mm 12.5mm - 1 31mm 28mm
RS Stock No. 741-3068
Mfr. Part No.ZCAT3035-1330
BrandTDK
HK$45.47
Each
units
ZCAT Bead EMC Absorption 30 Material - - - - 34 Dia. x 39mm 13mm - 1 30mm -
RS Stock No. 466-9209
Mfr. Part No.0444164281
BrandFair-Rite
HK$15.69
Each
units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes - 20 x 9.8 x 39.4mm 6.6mm - 1 9.8mm 39.4mm