Size Dimen­sions L
(mm)
W
(mm)
H
(mm)
Mount
0402
1 0.55 0.55 SMT
0603
1.65 1.1 0.9 SMT
0805
2 1.25 1.2 SMT
1008
2.5 2 1.6 SMT

Characteristics

  • High performance ferrite beads
  • High impedance over a broad bandwidth
  • High current ratings
  • No core saturation
  • Very low RDC
  • Recommended soldering: Reflow
  • Custom designs on request
  • AEC-Q200 Grade 3 (−40°C to +85°C)
  • Operating temperature: –40 °C to +85 °C

Applications

  • Low pass filters to eliminate high frequency noise
  • Perfect as data line filter and for uncoupling of distribution voltage

Products

All
0402
0603
0805
1008
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Order Code
Data­sheet
Simu­lation
Downloads
Status
Z @ 10 MHz (Ω)
Z @ 25 MHz (Ω)
Z @ 100 MHz (Ω)
Zmax (Ω)
Test Condition Zmax
IR 2 (mA)
RDC max. (mΩ)
Design Kit
Samples
WE-RFI SMT Wirewound Ferrite Bead
7447610322
130 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 130 Ω
Maximum Impedance 6380 Ω
Maximum Impedance 110 MHz 
Rated Current 2 575 mA
DC Resistance 400 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610333
190 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 190 Ω
Maximum Impedance 10250 Ω
Maximum Impedance 110 MHz 
Rated Current 2 350 mA
DC Resistance 950 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610347
280 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 280 Ω
Maximum Impedance 11100 Ω
Maximum Impedance 67 MHz 
Rated Current 2 300 mA
DC Resistance 1125 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610356
325 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 325 Ω
Maximum Impedance 12080 Ω
Maximum Impedance 62 MHz 
Rated Current 2 315 mA
DC Resistance 1055 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610368
400 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 400 Ω
Maximum Impedance 13300 Ω
Maximum Impedance 52 MHz 
Rated Current 2 280 mA
DC Resistance 1380 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610382
490 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 490 Ω
Maximum Impedance 14390 Ω
Maximum Impedance 46 MHz 
Rated Current 2 250 mA
DC Resistance 1550 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610410
580 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 580 Ω
Maximum Impedance 15450 Ω
Maximum Impedance 40 MHz 
Rated Current 2 260 mA
DC Resistance 1700 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762410A
670 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 670 Ω
Maximum Impedance 32000 Ω
Maximum Impedance 55 MHz 
Rated Current 2 230 mA
DC Resistance 3500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762415A
950 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 950 Ω
Maximum Impedance 70000 Ω
Maximum Impedance 70 MHz 
Rated Current 2 200 mA
DC Resistance 4000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610415
950 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 950 Ω
Maximum Impedance 22410 Ω
Maximum Impedance 30 MHz 
Rated Current 2 155 mA
DC Resistance 3900 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762418A
1300 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 1300 Ω
Maximum Impedance 35000 Ω
Maximum Impedance 30 MHz 
Rated Current 2 195 mA
DC Resistance 4500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762422A
1400 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 1400 Ω
Maximum Impedance 70000 Ω
Maximum Impedance 50 MHz 
Rated Current 2 200 mA
DC Resistance 5000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762427A
1900 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 1900 Ω
Maximum Impedance 86000 Ω
Maximum Impedance 45 MHz 
Rated Current 2 165 mA
DC Resistance 6000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762433A
2500 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 2500 Ω
Maximum Impedance 75000 Ω
Maximum Impedance 30 MHz 
Rated Current 2 160 mA
DC Resistance 6500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762439A
2900 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 2900 Ω
Maximum Impedance 90000 Ω
Maximum Impedance 30 MHz 
Rated Current 2 145 mA
DC Resistance 8500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762447A
3400 Ω, –, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz 3400 Ω
Maximum Impedance 125000 Ω
Maximum Impedance 30 MHz 
Rated Current 2 110 mA
DC Resistance 14000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760247A
–, –, 280 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 280 Ω
Maximum Impedance 4725 Ω
Maximum Impedance 700 MHz 
Rated Current 2 650 mA
DC Resistance 500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760256A
–, –, 350 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 350 Ω
Maximum Impedance 5570 Ω
Maximum Impedance 600 MHz 
Rated Current 2 620 mA
DC Resistance 550 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760268A
–, –, 420 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 420 Ω
Maximum Impedance 6860 Ω
Maximum Impedance 550 MHz 
Rated Current 2 560 mA
DC Resistance 850 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760282A
–, –, 520 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 520 Ω
Maximum Impedance 8500 Ω
Maximum Impedance 500 MHz 
Rated Current 2 450 mA
DC Resistance 1050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760310A
–, –, 620 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 620 Ω
Maximum Impedance 9665 Ω
Maximum Impedance 450 MHz 
Rated Current 2 430 mA
DC Resistance 1050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760312A
–, –, 730 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 730 Ω
Maximum Impedance 12500 Ω
Maximum Impedance 440 MHz 
Rated Current 2 380 mA
DC Resistance 1200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760315A
–, –, 950 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 950 Ω
Maximum Impedance 15100 Ω
Maximum Impedance 390 MHz 
Rated Current 2 330 mA
DC Resistance 1450 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760318A
–, –, 1160 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1160 Ω
Maximum Impedance 19700 Ω
Maximum Impedance 340 MHz 
Rated Current 2 310 mA
DC Resistance 2000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760322A
–, –, 1300 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1300 Ω
Maximum Impedance 11600 Ω
Maximum Impedance 300 MHz 
Rated Current 2 300 mA
DC Resistance 1750 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760327A
–, –, 1650 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1650 Ω
Maximum Impedance 14870 Ω
Maximum Impedance 290 MHz 
Rated Current 2 275 mA
DC Resistance 1750 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760333A
–, –, 1980 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1980 Ω
Maximum Impedance 18140 Ω
Maximum Impedance 250 MHz 
Rated Current 2 285 mA
DC Resistance 2000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760339A
–, –, 2300 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 2300 Ω
Maximum Impedance 20360 Ω
Maximum Impedance 250 MHz 
Rated Current 2 265 mA
DC Resistance 2150 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760347A
–, 730 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 730 Ω
Maximum Impedance 16780 Ω
Maximum Impedance 140 MHz 
Rated Current 2 260 mA
DC Resistance 1900 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760356A
–, 830 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 830 Ω
Maximum Impedance 17920 Ω
Maximum Impedance 110 MHz 
Rated Current 2 260 mA
DC Resistance 2200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760382A
–, 1180 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 1180 Ω
Maximum Impedance 25220 Ω
Maximum Impedance 105 MHz 
Rated Current 2 250 mA
DC Resistance 2400 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760410A
–, 1490 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 1490 Ω
Maximum Impedance 31920 Ω
Maximum Impedance 105 MHz 
Rated Current 2 190 mA
DC Resistance 3600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762312A
–, –, 780 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 780 Ω
Maximum Impedance 32000 Ω
Maximum Impedance 385 MHz 
Rated Current 2 350 mA
DC Resistance 1300 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762315A
–, –, 1000 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1000 Ω
Maximum Impedance 65000 Ω
Maximum Impedance 350 MHz 
Rated Current 2 285 mA
DC Resistance 1650 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762318A
–, –, 1200 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1200 Ω
Maximum Impedance 95000 Ω
Maximum Impedance 310 MHz 
Rated Current 2 265 mA
DC Resistance 2200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762322A
–, –, 1550 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 1550 Ω
Maximum Impedance 105000 Ω
Maximum Impedance 270 MHz 
Rated Current 2 260 mA
DC Resistance 2350 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762327A
–, 450 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 450 Ω
Maximum Impedance 40000 Ω
Maximum Impedance 150 MHz 
Rated Current 2 250 mA
DC Resistance 2600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762333A
–, 550 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 550 Ω
Maximum Impedance 38000 Ω
Maximum Impedance 120 MHz 
Rated Current 2 210 mA
DC Resistance 2850 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762339A
–, 650 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 650 Ω
Maximum Impedance 35000 Ω
Maximum Impedance 95 MHz 
Rated Current 2 200 mA
DC Resistance 4000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762347A
–, 800 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 800 Ω
Maximum Impedance 38000 Ω
Maximum Impedance 85 MHz 
Rated Current 2 190 mA
DC Resistance 4300 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762356A
–, 1000 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 1000 Ω
Maximum Impedance 38000 Ω
Maximum Impedance 110 MHz 
Rated Current 2 260 mA
DC Resistance 2600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762368A
–, 1200 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 1200 Ω
Maximum Impedance 37000 Ω
Maximum Impedance 85 MHz 
Rated Current 2 240 mA
DC Resistance 2800 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762382A
–, 1600 Ω, –
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz 1600 Ω
Maximum Impedance 35000 Ω
Maximum Impedance 65 MHz 
Rated Current 2 230 mA
DC Resistance 3050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610139
–, –, 20 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 20 Ω
Maximum Impedance 160 Ω
Maximum Impedance 2320 MHz 
Rated Current 2 1910 mA
DC Resistance 42 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610168
–, –, 35 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 35 Ω
Maximum Impedance 265 Ω
Maximum Impedance 1925 MHz 
Rated Current 2 1650 mA
DC Resistance 50 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610211
–, –, 60 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 60 Ω
Maximum Impedance 540 Ω
Maximum Impedance 1925 MHz 
Rated Current 2 1230 mA
DC Resistance 78 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610215
–, –, 80 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 80 Ω
Maximum Impedance 705 Ω
Maximum Impedance 1885 MHz 
Rated Current 2 1170 mA
DC Resistance 90 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610220
–, –, 105 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 105 Ω
Maximum Impedance 860 Ω
Maximum Impedance 1730 MHz 
Rated Current 2 1100 mA
DC Resistance 105 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610224
–, –, 125 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 125 Ω
Maximum Impedance 1215 Ω
Maximum Impedance 1345 MHz 
Rated Current 2 810 mA
DC Resistance 180 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610227
–, –, 140 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 140 Ω
Maximum Impedance 1255 Ω
Maximum Impedance 1540 MHz 
Rated Current 2 790 mA
DC Resistance 165 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610236
–, –, 190 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 190 Ω
Maximum Impedance 1840 Ω
Maximum Impedance 1040 MHz 
Rated Current 2 770 mA
DC Resistance 185 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610242
–, –, 220 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 220 Ω
Maximum Impedance 2000 Ω
Maximum Impedance 1110 MHz 
Rated Current 2 670 mA
DC Resistance 255 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610256
–, –, 320 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 320 Ω
Maximum Impedance 2820 Ω
Maximum Impedance 915 MHz 
Rated Current 2 640 mA
DC Resistance 270 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610260
–, –, 320 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 320 Ω
Maximum Impedance 2700 Ω
Maximum Impedance 1000 MHz 
Rated Current 2 545 mA
DC Resistance 380 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610282
–, –, 440 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 440 Ω
Maximum Impedance 3590 Ω
Maximum Impedance 830 MHz 
Rated Current 2 470 mA
DC Resistance 450 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610310
–, –, 535 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 535 Ω
Maximum Impedance 4670 Ω
Maximum Impedance 680 MHz 
Rated Current 2 375 mA
DC Resistance 700 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610315
–, –, 830 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 830 Ω
Maximum Impedance 6910 Ω
Maximum Impedance 605 MHz 
Rated Current 2 240 mA
DC Resistance 1070 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650120
–, –, 11 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 11 Ω
Maximum Impedance 187 Ω
Maximum Impedance 7720 MHz 
Rated Current 2 1770 mA
DC Resistance 25 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650130
–, –, 16 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 16 Ω
Maximum Impedance 261 Ω
Maximum Impedance 3800 MHz 
Rated Current 2 1470 mA
DC Resistance 35 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650133
–, –, 18 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 18 Ω
Maximum Impedance 327 Ω
Maximum Impedance 3875 MHz 
Rated Current 2 1470 mA
DC Resistance 35 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650136
–, –, 20 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 20 Ω
Maximum Impedance 380 Ω
Maximum Impedance 3875 MHz 
Rated Current 2 1380 mA
DC Resistance 40 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650177
–, –, 42 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 42 Ω
Maximum Impedance 802 Ω
Maximum Impedance 2980 MHz 
Rated Current 2 1030 mA
DC Resistance 90 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650210
–, –, 55 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 55 Ω
Maximum Impedance 1184 Ω
Maximum Impedance 2955 MHz 
Rated Current 2 890 mA
DC Resistance 130 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650212
–, –, 65 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 65 Ω
Maximum Impedance 1160 Ω
Maximum Impedance 2955 MHz 
Rated Current 2 940 mA
DC Resistance 110 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650215
–, –, 84 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 84 Ω
Maximum Impedance 2063 Ω
Maximum Impedance 2590 MHz 
Rated Current 2 885 mA
DC Resistance 130 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650218
–, –, 100 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 100 Ω
Maximum Impedance 1836 Ω
Maximum Impedance 2955 MHz 
Rated Current 2 765 mA
DC Resistance 160 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650222
–, –, 120 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 120 Ω
Maximum Impedance 2318 Ω
Maximum Impedance 2170 MHz 
Rated Current 2 640 mA
DC Resistance 220 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650227
–, –, 150 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 150 Ω
Maximum Impedance 2883 Ω
Maximum Impedance 2015 MHz 
Rated Current 2 600 mA
DC Resistance 260 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650236
–, –, 200 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 200 Ω
Maximum Impedance 4418 Ω
Maximum Impedance 1565 MHz 
Rated Current 2 515 mA
DC Resistance 375 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650242
–, –, 235 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 235 Ω
Maximum Impedance 4888 Ω
Maximum Impedance 1810 MHz 
Rated Current 2 440 mA
DC Resistance 460 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650247
–, –, 260 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 260 Ω
Maximum Impedance 4790 Ω
Maximum Impedance 1600 MHz 
Rated Current 2 430 mA
DC Resistance 510 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650253
–, –, 300 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 300 Ω
Maximum Impedance 6050 Ω
Maximum Impedance 1600 MHz 
Rated Current 2 370 mA
DC Resistance 615 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650259
–, –, 330 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 330 Ω
Maximum Impedance 6260 Ω
Maximum Impedance 1370 MHz 
Rated Current 2 360 mA
DC Resistance 670 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650270
–, –, 400 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 400 Ω
Maximum Impedance 7130 Ω
Maximum Impedance 1565 MHz 
Rated Current 2 260 mA
DC Resistance 1125 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650277
–, –, 430 Ω
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz 430 Ω
Maximum Impedance 8900 Ω
Maximum Impedance 1240 MHz 
Rated Current 2 240 mA
DC Resistance 1250 mΩ
Design Kit

Impedance behavior

In the range of the highest impedance, i.e. the resonance range, the gray curve, which corresponds to the resistive ("ohmic") component of the impedance, has its maximum. The resistive component is only found in inductors with a ferrite core and represents the losses of the ferrite material over the frequency.

In case of choke applications in which inductors (with and without ferrite) are used, the best signal blocking occurs shortly below the self resonance frequency (SRF), where the impedance is very high and thus the attenuation reaches its maximum.

For filter or impedance-matching applications, it is more important to have constant inductance in the relevant frequency range, which means the SRF of the inductor should be well above the operating frequency of the circuit.

DC-Bias

For inductors, factors like DC bias current have less impact on the preservation of impedance until the inductors are used beyond the saturation current.

In contrast, DC bias has a prominent influence on multilayer ferrite (e.g. WE-CBF) and the current flowing through the component changes the impedance over a specific frequency range.

Multilayer ferrite saturate as a function of the flowing bias current, changing the impedance curve in the lower frequency (<100 MHz) at the same time, shifting the self resonant frequency higher in frequency.

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Würth Elektronik Webinar: Signal interface filters - effectiveness under real conditions