EMI Suppression Ferrite Beads

Würth Elektronik EMI Suppression Ferrite Bead product families include the WE-AFB, WE-AFB LFS, WE-SAFB, and WE-TOF series. The WE-AFB, WE-SAFB, and WE-TOF series all feature a ferrite core made of NiZn. This NiZn core allows for the best possible interference suppression and works in a broadband frequency range. The NiZn core ferrites are available in axial (WE-AFB) and toroidal (WE-SAFB) types. Würth WE-SAFB ferrite beads are smaller in size and used for cables with a diameter of 0.55mm up to 4mm. The WE-AFB LFS axial ferrite beads have an MnZn core. The MnZn core material is used for low-frequency applications from 150kHz and 30MHz.

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Qty. RoHS ECAD Model Series
Product
Impedance
Inside Diameter
Outside Diameter
Inside Length
Outside Length
Outside Width
Inside Height
Outside Height
Qualification
Packaging
Core Material
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 84Ohm Ferrite Core
Datasheet
698In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 84 Ohms 4.8 mm 9.5 mm 9.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 186Ohm Ferrite Core
Datasheet
204In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 186 Ohms 5 mm 11.5 mm 18.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 255Ohm Ferrite Core
Datasheet
565In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 255 Ohms 5 mm 11.5 mm 25 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 370Ohm Ferrite Core
Datasheet
586In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 370 Ohms 6.1 mm 12 mm 45 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 210Ohm Ferrite Core
Datasheet
328In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 210 Ohms 7.2 mm 14 mm 25 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 270Ohm Ferrite Core
Datasheet
186In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 270 Ohms 7.3 mm 15.5 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 240Ohm Ferrite Core
Datasheet
512In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 240 Ohms 8 mm 16 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 200Ohm Ferrite Core
Datasheet
236In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 200 Ohms 8.2 mm 14 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 205Ohm Ferrite Core
Datasheet
128In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 205 Ohms 9 mm 16 mm 28 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 220Ohm Ferrite Core
Datasheet
624In Stock
1,152Expected 2026/10/02
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 220 Ohms 9.5 mm 17.5 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 150Ohm Ferrite Core
Datasheet
151In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 150 Ohms 10.5 mm 15.5 mm 28 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 345Ohm Ferrite Core
Datasheet
579In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 345 Ohms 11.5 mm 19 mm 50.8 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 240Ohm Ferrite Core
Datasheet
127In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 240 Ohms 13 mm 26 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 190Ohm Ferrite Core
Datasheet
102In Stock
63Expected 2026/10/02
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 190 Ohms 15.5 mm 26 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA Axial EMI Suppression Ferrite 152 Ohms
Datasheet
9In Stock
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 152 Ohms 41.5 mm 65 mm 40 mm Bulk 1E04_620
Wurth Elektronik Ferrite Cable Cores WE-AFB EMI Axial 100MHz 200Ohm
Datasheet
113,713On Order
Min.: 1
Mult.: 1

WE-AFB Round Cable Cores Solid 200 Ohms 3.55 mm 12 mm 15 mm Tray 4 W 1500
Wurth Elektronik Ferrite Cable Cores WE-SAFB 1.65mm 50Ohm @ 25MHz
Datasheet
8,332Expected 2026/10/02
Min.: 1
Mult.: 1

WE-SAFB Round Cable Cores Solid 79 Ohms 2 mm 4 mm 10 mm Bulk 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-AFB Axial 25MHz 133Ohm
Datasheet
6,236On Order
Min.: 1
Mult.: 1

WE-AFB Round Cable Cores Solid 211 Ohms 7.2 mm 14.2 mm 25 mm Tray 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-FLAT Flat Ferrite Core
Datasheet
1,792Expected 2026/10/16
Min.: 1
Mult.: 1

WE-FLAT Flat Ribbon Cable Cores Solid 22 mm 9 mm 26 mm 1.2 mm 5 mm Tray 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-FLAT Round 100MHz @ 50Ohms
Datasheet
3,116Expected 2026/10/23
Min.: 1
Mult.: 1

WE-FLAT Flat Ribbon Cable Cores Solid 50 Ohms 17 mm 21 mm 8 mm 0.8 mm 5 mm Tray 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-AEFA AEC-Q200 270Ohm Ferrite Core
Datasheet
1,219On Order
Min.: 1
Mult.: 1

WE-AEFA Round Cable Cores Solid 270 Ohms 6.3 mm 14 mm 28.5 mm AEC-Q200 Tray 1E04 620
Wurth Elektronik Ferrite Cable Cores WE-SAFB 1.65mm 45Ohm @ 25MHz
Datasheet
1,000Expected 2026/10/02
Min.: 1
Mult.: 1

WE-SAFB Round Cable Cores Solid 60 Ohms 2 mm 4 mm 10 mm Bulk 4 W 1500
Wurth Elektronik Ferrite Cable Cores WE-AFB 1 Turn Axial 25MHz @ 119Ohms
Datasheet
2,816Expected 2026/10/02
Min.: 1
Mult.: 1

WE-AFB Round Cable Cores Solid 199 Ohms 5.6 mm 12 mm 20 mm Tray 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-FLAT 48Ohms 21Pol
Datasheet
462Expected 2026/10/02
Min.: 1
Mult.: 1

WE-FLAT Flat Ribbon Cable Cores Solid 48 Ohms 28 mm 33.5 mm 8 mm 1.3 mm 6.5 mm Tray 4 W 620
Wurth Elektronik Ferrite Cable Cores WE-FLAT Ferrite for Flexible Printed Circuit Board
Datasheet
256Expected 2026/10/02
Min.: 1
Mult.: 1

WE-FLAT Flat Ribbon Cable Cores Solid 65 Ohms 20 mm 24.5 mm 12 mm 0.5 mm 5 mm Tray 4 W 620