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. 109-4164
Mfr. Part No.ZCAT1730-0730A
BrandTDK
HK$7.239
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
HK$17.81
Each
units
ZCAT Ferrite Core USB 30 Material - - Yes - 23 Dia. x 30mm 7mm - 1 16.5mm 17.4mm
RS Stock No. 367-5304
Mfr. Part No.74271132
HK$42.28
Each
units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 241Ω 36.3 x 24.2 x 19.7mm 7.0 → 8.5mm - 1 24.2mm 19.7mm
RS Stock No. 222-4337
Mfr. Part No.MSFC4-T
BrandRichco
HK$71.49
Each
units
MSFC Cable Core EMI Suppression A5 Material - - Yes 139 13.2 x 14.3mm 5mm - 1 - 14.3mm
RS Stock No. 774-0648
Mfr. Part No.ZCAT2436-1330A
BrandTDK
HK$34.72
Each
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 28 Dia. x 35mm 13mm - 1 19.5mm 17.4mm
RS Stock No. 109-4167
Mfr. Part No.ZCAT2436-1330A
BrandTDK
HK$16.26
Each (On a Reel of 400)
units
ZCAT Ferrite Core Suppression Components 30 Material - - - - 28 Dia. x 35mm 13mm - 1 19.5mm 17.4mm
RS Stock No. 222-4371
Mfr. Part No.MSFC 10-T
BrandRichco
HK$134.14
Each
units
MSFC Cable Core EMI Suppression A5 - - Yes 223 28 x 29.8mm 10.5mm - 1 - 29.8mm
RS Stock No. 466-9142
Mfr. Part No.0431173951
BrandFair-Rite
HK$12.34
Each
units
- Round Cable Snap-Its EMI Suppression 31 Material - - Yes 180 12.8 x 5.6 x 25mm 5.1mm - 1 5.6mm 25mm
RS Stock No. 811-9133
Mfr. Part No.ESD-SR-S10
BrandKEMET
HK$16.18
Each
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. 222-4343
Mfr. Part No.MSFC5-T
BrandRichco
HK$57.93
Each
units
MSFC Cable Core EMI Suppression A5 - - Yes 229 16.6 x 18mm 6mm - 1 - 18mm
RS Stock No. 466-9192
Mfr. Part No.0444164181
BrandFair-Rite
HK$39.34
Each
units
- Round Cable Snap-Its EMI Suppression 43 Material, 44 Material - - Yes - 31 x 15.25 x 39.4mm 13.05mm - 1 15.25mm 39.4mm
RS Stock No. 814-3382
Mfr. Part No.432703021311
BrandFERROXCUBE
HK$28.86
Each
units
- Cable Shield EMI Suppression 4S2 Material - - - - 25.9 Dia. x 28.6mm 12.8mm - 1 - 28.6mm
RS Stock No. 171-0801
Mfr. Part No.432703021311
BrandFERROXCUBE
HK$22.408
Each (On a Reel of 128)
units
- Cable Shield EMI Suppression 4S2 Material - - - - - - - - - -
RS Stock No. 219-2656
Mfr. Part No.0443167251
BrandFair-Rite
HK$17.81
Each
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. 111-0865
Mfr. Part No.ZCAT2235-1030A
BrandTDK
HK$11.381
Each (On a Reel of 400)
units
ZCAT Bead EMC Absorption 30 Material - - - - 28 Dia. 35mm 10mm - 1 10mm 20mm
RS Stock No. 260-6543
Mfr. Part No.7427141
HK$33.82
Each
units
- Ring Core General Application 4 W 620 - - Yes 97 15.5 x 30 x 36mm 15mm - 1 15.5mm 30mm
RS Stock No. 815-0002
Mfr. Part No.74271221S
HK$48.14
Each
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. 741-3056
Mfr. Part No.ZCAT2235-1030A
BrandTDK
HK$23.17
Each
units
ZCAT Bead EMC Absorption 30 Material - - - - 28 Dia. 35mm 10mm - 1 10mm 20mm
RS Stock No. 170-3333
Mfr. Part No.ZCAT3035-1330-BK
BrandTDK
HK$24.472
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. 222-4359
Mfr. Part No.MSFC6-T
BrandRichco
HK$61.49
Each
units
MSFC Cable Core EMI Suppression A5 - - Yes 192 19 x 20.8mm 7mm - 1 - 20.8mm