WE-RFI SMT Wirewound Ferrite Bead
SizeDimen­sionsL
(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 Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz130 Ω
Maximum Impedance6380 Ω
Maximum Impedance110 MHz 
Rated Current 2575 mA
DC Resistance400 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610333
190 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz190 Ω
Maximum Impedance10250 Ω
Maximum Impedance110 MHz 
Rated Current 2350 mA
DC Resistance950 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610347
280 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz280 Ω
Maximum Impedance11100 Ω
Maximum Impedance67 MHz 
Rated Current 2300 mA
DC Resistance1125 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610356
325 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz325 Ω
Maximum Impedance12080 Ω
Maximum Impedance62 MHz 
Rated Current 2315 mA
DC Resistance1055 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610368
400 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz400 Ω
Maximum Impedance13300 Ω
Maximum Impedance52 MHz 
Rated Current 2280 mA
DC Resistance1380 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610382
490 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz490 Ω
Maximum Impedance14390 Ω
Maximum Impedance46 MHz 
Rated Current 2250 mA
DC Resistance1550 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610410
580 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz580 Ω
Maximum Impedance15450 Ω
Maximum Impedance40 MHz 
Rated Current 2260 mA
DC Resistance1700 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762410A
670 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz670 Ω
Maximum Impedance32000 Ω
Maximum Impedance55 MHz 
Rated Current 2230 mA
DC Resistance3500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762415A
950 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz950 Ω
Maximum Impedance70000 Ω
Maximum Impedance70 MHz 
Rated Current 2200 mA
DC Resistance4000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610415
950 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz950 Ω
Maximum Impedance22410 Ω
Maximum Impedance30 MHz 
Rated Current 2155 mA
DC Resistance3900 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762418A
1300 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz1300 Ω
Maximum Impedance35000 Ω
Maximum Impedance30 MHz 
Rated Current 2195 mA
DC Resistance4500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762422A
1400 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz1400 Ω
Maximum Impedance70000 Ω
Maximum Impedance50 MHz 
Rated Current 2200 mA
DC Resistance5000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762427A
1900 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz1900 Ω
Maximum Impedance86000 Ω
Maximum Impedance45 MHz 
Rated Current 2165 mA
DC Resistance6000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762433A
2500 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz2500 Ω
Maximum Impedance75000 Ω
Maximum Impedance30 MHz 
Rated Current 2160 mA
DC Resistance6500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762439A
2900 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz2900 Ω
Maximum Impedance90000 Ω
Maximum Impedance30 MHz 
Rated Current 2145 mA
DC Resistance8500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762447A
3400 Ω, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 10 MHz3400 Ω
Maximum Impedance125000 Ω
Maximum Impedance30 MHz 
Rated Current 2110 mA
DC Resistance14000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760247A
–, –, 280 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz280 Ω
Maximum Impedance4725 Ω
Maximum Impedance700 MHz 
Rated Current 2650 mA
DC Resistance500 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760256A
–, –, 350 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz350 Ω
Maximum Impedance5570 Ω
Maximum Impedance600 MHz 
Rated Current 2620 mA
DC Resistance550 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760268A
–, –, 420 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz420 Ω
Maximum Impedance6860 Ω
Maximum Impedance550 MHz 
Rated Current 2560 mA
DC Resistance850 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760282A
–, –, 520 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz520 Ω
Maximum Impedance8500 Ω
Maximum Impedance500 MHz 
Rated Current 2450 mA
DC Resistance1050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760310A
–, –, 620 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz620 Ω
Maximum Impedance9665 Ω
Maximum Impedance450 MHz 
Rated Current 2430 mA
DC Resistance1050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760312A
–, –, 730 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz730 Ω
Maximum Impedance12500 Ω
Maximum Impedance440 MHz 
Rated Current 2380 mA
DC Resistance1200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760315A
–, –, 950 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz950 Ω
Maximum Impedance15100 Ω
Maximum Impedance390 MHz 
Rated Current 2330 mA
DC Resistance1450 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760318A
–, –, 1160 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1160 Ω
Maximum Impedance19700 Ω
Maximum Impedance340 MHz 
Rated Current 2310 mA
DC Resistance2000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760322A
–, –, 1300 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1300 Ω
Maximum Impedance11600 Ω
Maximum Impedance300 MHz 
Rated Current 2300 mA
DC Resistance1750 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760327A
–, –, 1650 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1650 Ω
Maximum Impedance14870 Ω
Maximum Impedance290 MHz 
Rated Current 2275 mA
DC Resistance1750 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760333A
–, –, 1980 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1980 Ω
Maximum Impedance18140 Ω
Maximum Impedance250 MHz 
Rated Current 2285 mA
DC Resistance2000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760339A
–, –, 2300 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz2300 Ω
Maximum Impedance20360 Ω
Maximum Impedance250 MHz 
Rated Current 2265 mA
DC Resistance2150 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760347A
–, 730 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz730 Ω
Maximum Impedance16780 Ω
Maximum Impedance140 MHz 
Rated Current 2260 mA
DC Resistance1900 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760356A
–, 830 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz830 Ω
Maximum Impedance17920 Ω
Maximum Impedance110 MHz 
Rated Current 2260 mA
DC Resistance2200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760382A
–, 1180 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz1180 Ω
Maximum Impedance25220 Ω
Maximum Impedance105 MHz 
Rated Current 2250 mA
DC Resistance2400 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744760410A
–, 1490 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz1490 Ω
Maximum Impedance31920 Ω
Maximum Impedance105 MHz 
Rated Current 2190 mA
DC Resistance3600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762312A
–, –, 780 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz780 Ω
Maximum Impedance32000 Ω
Maximum Impedance385 MHz 
Rated Current 2350 mA
DC Resistance1300 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762315A
–, –, 1000 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1000 Ω
Maximum Impedance65000 Ω
Maximum Impedance350 MHz 
Rated Current 2285 mA
DC Resistance1650 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762318A
–, –, 1200 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1200 Ω
Maximum Impedance95000 Ω
Maximum Impedance310 MHz 
Rated Current 2265 mA
DC Resistance2200 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762322A
–, –, 1550 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz1550 Ω
Maximum Impedance105000 Ω
Maximum Impedance270 MHz 
Rated Current 2260 mA
DC Resistance2350 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762327A
–, 450 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz450 Ω
Maximum Impedance40000 Ω
Maximum Impedance150 MHz 
Rated Current 2250 mA
DC Resistance2600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762333A
–, 550 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz550 Ω
Maximum Impedance38000 Ω
Maximum Impedance120 MHz 
Rated Current 2210 mA
DC Resistance2850 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762339A
–, 650 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz650 Ω
Maximum Impedance35000 Ω
Maximum Impedance95 MHz 
Rated Current 2200 mA
DC Resistance4000 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762347A
–, 800 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz800 Ω
Maximum Impedance38000 Ω
Maximum Impedance85 MHz 
Rated Current 2190 mA
DC Resistance4300 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762356A
–, 1000 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz1000 Ω
Maximum Impedance38000 Ω
Maximum Impedance110 MHz 
Rated Current 2260 mA
DC Resistance2600 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762368A
–, 1200 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz1200 Ω
Maximum Impedance37000 Ω
Maximum Impedance85 MHz 
Rated Current 2240 mA
DC Resistance2800 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
744762382A
–, 1600 Ω, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 25 MHz1600 Ω
Maximum Impedance35000 Ω
Maximum Impedance65 MHz 
Rated Current 2230 mA
DC Resistance3050 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610139
–, –, 20 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz20 Ω
Maximum Impedance160 Ω
Maximum Impedance2320 MHz 
Rated Current 21910 mA
DC Resistance42 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610168
–, –, 35 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz35 Ω
Maximum Impedance265 Ω
Maximum Impedance1925 MHz 
Rated Current 21650 mA
DC Resistance50 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610211
–, –, 60 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz60 Ω
Maximum Impedance540 Ω
Maximum Impedance1925 MHz 
Rated Current 21230 mA
DC Resistance78 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610215
–, –, 80 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz80 Ω
Maximum Impedance705 Ω
Maximum Impedance1885 MHz 
Rated Current 21170 mA
DC Resistance90 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610220
–, –, 105 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz105 Ω
Maximum Impedance860 Ω
Maximum Impedance1730 MHz 
Rated Current 21100 mA
DC Resistance105 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610224
–, –, 125 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz125 Ω
Maximum Impedance1215 Ω
Maximum Impedance1345 MHz 
Rated Current 2810 mA
DC Resistance180 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610227
–, –, 140 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz140 Ω
Maximum Impedance1255 Ω
Maximum Impedance1540 MHz 
Rated Current 2790 mA
DC Resistance165 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610236
–, –, 190 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz190 Ω
Maximum Impedance1840 Ω
Maximum Impedance1040 MHz 
Rated Current 2770 mA
DC Resistance185 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610242
–, –, 220 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz220 Ω
Maximum Impedance2000 Ω
Maximum Impedance1110 MHz 
Rated Current 2670 mA
DC Resistance255 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610256
–, –, 320 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz320 Ω
Maximum Impedance2820 Ω
Maximum Impedance915 MHz 
Rated Current 2640 mA
DC Resistance270 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610260
–, –, 320 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz320 Ω
Maximum Impedance2700 Ω
Maximum Impedance1000 MHz 
Rated Current 2545 mA
DC Resistance380 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610282
–, –, 440 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz440 Ω
Maximum Impedance3590 Ω
Maximum Impedance830 MHz 
Rated Current 2470 mA
DC Resistance450 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610310
–, –, 535 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz535 Ω
Maximum Impedance4670 Ω
Maximum Impedance680 MHz 
Rated Current 2375 mA
DC Resistance700 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447610315
–, –, 830 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz830 Ω
Maximum Impedance6910 Ω
Maximum Impedance605 MHz 
Rated Current 2240 mA
DC Resistance1070 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650120
–, –, 11 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz11 Ω
Maximum Impedance187 Ω
Maximum Impedance7720 MHz 
Rated Current 21770 mA
DC Resistance25 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650130
–, –, 16 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz16 Ω
Maximum Impedance261 Ω
Maximum Impedance3800 MHz 
Rated Current 21470 mA
DC Resistance35 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650133
–, –, 18 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz18 Ω
Maximum Impedance327 Ω
Maximum Impedance3875 MHz 
Rated Current 21470 mA
DC Resistance35 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650136
–, –, 20 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz20 Ω
Maximum Impedance380 Ω
Maximum Impedance3875 MHz 
Rated Current 21380 mA
DC Resistance40 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650177
–, –, 42 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz42 Ω
Maximum Impedance802 Ω
Maximum Impedance2980 MHz 
Rated Current 21030 mA
DC Resistance90 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650210
–, –, 55 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz55 Ω
Maximum Impedance1184 Ω
Maximum Impedance2955 MHz 
Rated Current 2890 mA
DC Resistance130 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650212
–, –, 65 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz65 Ω
Maximum Impedance1160 Ω
Maximum Impedance2955 MHz 
Rated Current 2940 mA
DC Resistance110 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650215
–, –, 84 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz84 Ω
Maximum Impedance2063 Ω
Maximum Impedance2590 MHz 
Rated Current 2885 mA
DC Resistance130 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650218
–, –, 100 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz100 Ω
Maximum Impedance1836 Ω
Maximum Impedance2955 MHz 
Rated Current 2765 mA
DC Resistance160 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650222
–, –, 120 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz120 Ω
Maximum Impedance2318 Ω
Maximum Impedance2170 MHz 
Rated Current 2640 mA
DC Resistance220 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650227
–, –, 150 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz150 Ω
Maximum Impedance2883 Ω
Maximum Impedance2015 MHz 
Rated Current 2600 mA
DC Resistance260 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650236
–, –, 200 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz200 Ω
Maximum Impedance4418 Ω
Maximum Impedance1565 MHz 
Rated Current 2515 mA
DC Resistance375 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650242
–, –, 235 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz235 Ω
Maximum Impedance4888 Ω
Maximum Impedance1810 MHz 
Rated Current 2440 mA
DC Resistance460 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650247
–, –, 260 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz260 Ω
Maximum Impedance4790 Ω
Maximum Impedance1600 MHz 
Rated Current 2430 mA
DC Resistance510 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650253
–, –, 300 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz300 Ω
Maximum Impedance6050 Ω
Maximum Impedance1600 MHz 
Rated Current 2370 mA
DC Resistance615 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650259
–, –, 330 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz330 Ω
Maximum Impedance6260 Ω
Maximum Impedance1370 MHz 
Rated Current 2360 mA
DC Resistance670 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650270
–, –, 400 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz400 Ω
Maximum Impedance7130 Ω
Maximum Impedance1565 MHz 
Rated Current 2260 mA
DC Resistance1125 mΩ
Design Kit
WE-RFI SMT Wirewound Ferrite Bead
7447650277
–, –, 430 Ω
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Impedance @ 100 MHz430 Ω
Maximum Impedance8900 Ω
Maximum Impedance1240 MHz 
Rated Current 2240 mA
DC Resistance1250 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.

Assortments

Articles from this product series can be found in the following assortments:

Videos

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