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. 309-7940
Mfr. Part No.74271131
MYR19.95
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. 177-6021
Mfr. Part No.74275812
MYR17.30
Each (In a Box of 56)
units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes 200Ω 19 x 19 x 30.3mm 2.5 → 5mm - 1 30.3mm 19mm
RS Stock No. 736-1914
Mfr. Part No.74275812
MYR19.48
Each
units
STAR-BUENO Snap Ferrite EMI Suppression 4W620 - No Yes 200Ω 19 x 19 x 30.3mm 2.5 → 5mm - 1 30.3mm 19mm
RS Stock No. 367-5297
Mfr. Part No.74271112
MYR17.71
Each
units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 321Ω 23.7 x 36.9 x 18.2mm 6.6mm - 1 36.9mm 18.2mm
RS Stock No. 367-5310
Mfr. Part No.74271222
MYR21.99
Each
units
STAR-TEC STAR-TEC EMI Suppression 4 W 620 - No Yes 265 42.2 x 28.8 x 33.5mm 13mm - 1 28.8mm 33.5mm
RS Stock No. 814-9989
Mfr. Part No.7427155S
MYR28.10
Each
units
STAR-RING Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 100 55 x 20 x 44mm 27.5mm - 1 20mm 44mm
RS Stock No. 163-5431
Mfr. Part No.74271142S
MYR17.96
Each (In a Box of 42)
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. 177-6025
Mfr. Part No.74271142S
MYR16.73
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. 815-0021
Mfr. Part No.74271
MYR1.10
Each (In a Bag of 10)
units
- Safety Key General Application - - - - - - - - - - -
RS Stock No. 163-3993
Mfr. Part No.7427154
MYR24.74
Each (In a Box of 40)
units
STAR-RING Split Core - 4W620 - No Yes 130Ω 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 163-5436
Mfr. Part No.7427155S
MYR27.65
Each (In a Box of 30)
units
STAR-RING Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 100 55 x 20 x 44mm 27.5mm - 1 20mm 44mm
RS Stock No. 814-9992
Mfr. Part No.74271142S
MYR18.97
Each
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. 756-8386
Mfr. Part No.7427154
MYR25.11
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. 309-7962
Mfr. Part No.74271221
MYR23.64
Each
units
STAR-TEC STAR-TEC General Application 4 W 620 - No Yes 270Ω 33.6 x 29.5 x 37.7mm 13mm - - 33.6mm 29.5mm
RS Stock No. 163-3991
Mfr. Part No.7427151
MYR21.80
Each (In a Box of 40)
units
STAR-RING Split Core - 4W620 - - Yes 130Ω 40 x 20 x 30mm 14.5mm - 1 20mm 30mm
RS Stock No. 163-5432
Mfr. Part No.74271221S
MYR24.58
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. 923-6166
Mfr. Part No.74271211S
MYR80.98
Each
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. 163-5426
Mfr. Part No.74271111
MYR17.42
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. 163-5435
Mfr. Part No.7427154S
MYR24.74
Each (In a Box of 40)
units
STAR-RING Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 43 x 20 x 32mm 16mm - 1 20mm 32mm
RS Stock No. 177-6022
Mfr. Part No.74271142
MYR16.73
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