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. 367-5304
Mfr. Part No.74271132
HK$56.60
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. 815-0002
Mfr. Part No.74271221S
HK$49.75
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. 260-6543
Mfr. Part No.7427141
HK$36.11
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. 163-5432
Mfr. Part No.74271221S
HK$45.90
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. 309-7962
Mfr. Part No.74271221
HK$48.61
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. 923-6163
Mfr. Part No.74271211
HK$152.62
Each
units
STAR-TEC Snap Ferrite EMI Suppression 4 W 620 - No Yes 425Ω 43 x 56 x 47mm 17 → 21mm - 1 56mm 47mm
RS Stock No. 923-6166
Mfr. Part No.74271211S
HK$144.48
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. 500-2972
Mfr. Part No.74271622S
HK$51.99
Each
units
STAR-GAP STAR-GAP - 4W620 - - Yes 140Ω 31.5 x 35 x 28.3mm 13mm - 1 35mm 28.3mm
RS Stock No. 163-5428
Mfr. Part No.74271112S
HK$32.526
Each (In a Box of 38)
units
- Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes - 40.5 x 23.7 x 18.2mm - - 1 23.7mm 18.2mm
RS Stock No. 814-9992
Mfr. Part No.74271142S
HK$33.93
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. 815-0021
Mfr. Part No.74271
HK$2.10
Each (In a Bag of 10)
units
- Safety Key General Application - - - - - - - - - - -
RS Stock No. 163-5440
Mfr. Part No.74271733S
HK$29.78
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. 815-0018
Mfr. Part No.74271222S
HK$51.39
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. 163-5441
Mfr. Part No.7427711
HK$12.41
Each (In a Tray of 180)
units
- Snap Ferrite STAR-TEC 74271111/74271112 STAR-GAP 74271633 STAR-FIX 74271733 STAR-FIX LFS 74272733 Ferrite - - - - 26 x 16 x 18.5mm - - - 16mm 18.5mm
RS Stock No. 185-7328
Mfr. Part No.74272251
HK$85.70
Each
units
STAR-TEC Snap Ferrite Especially for Applications in the Low Frequency Range from 300 kHz to 30 Mhz, Perfect for Applications with Varying Cable Diameter, Reusable because of the Key Technology Therefore Perfect for Test and Measuring Purposes and Cables with Difficult Access, Suppression of Electronic Ballasts (i.e. Neon Tube) in the Lighting Industry Manganese-Zinc (Coating) - Yes - - 62 x 60 x 55mm 22 → 25mm - 1 62mm 55mm
RS Stock No. 814-9989
Mfr. Part No.7427155S
HK$53.93
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. 168-3209
Mfr. Part No.74271151S
HK$112.19
Each
units
STAR-TEC Snap Ferrite - Nickel Zinc - Yes Yes - 49 x 39 x 35 35mm - 1 39mm 35mm
RS Stock No. 163-5429
Mfr. Part No.74271131S
HK$35.237
Each (In a Box of 38)
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 246 40.5 x 24.5 x 21mm - - 1 24.5mm 21mm
RS Stock No. 815-0005
Mfr. Part No.74271131S
HK$39.45
Each
units
STAR-TEC Snap Ferrite General Application, Safety Relevant Application 4W620 - No Yes 246 40.5 x 24.5 x 21mm - - 1 24.5mm 21mm
RS Stock No. 163-3204
Mfr. Part No.74271622S
HK$54.671
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