WE-RFI Ferrite SMT Inductor
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 inductances
  • Recommended soldering: Reflow
  • Custom designs on request
  • AEC-Q200 Grade 3 (−40°C to +85°C)
  • Operating temperature: –40 °C to +85 °C

Applications

  • Especially developed for RF-applications
  • RFID
  • Low frequency radio applications (keyless)

Products

All
0402
0603
0805
1008
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Order Code
Data­sheet
Simu­lation
Downloads
Status
L(nH)
Tol. L
Test Condition L
Qmin.
Q(%)
RDC max.(mΩ)
IR(mA)
fres(MHz)
Design Kit
Samples
WE-RFI Ferrite SMT Inductor
7447650120
20 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance20 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance25 mΩ
Rated Current1080 mA
Self Resonant Frequency7720 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650130
30 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance30 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance35 mΩ
Rated Current900 mA
Self Resonant Frequency3800 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650133
33 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance33 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance35 mΩ
Rated Current900 mA
Self Resonant Frequency3875 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650136
36 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance36 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance40 mΩ
Rated Current850 mA
Self Resonant Frequency3875 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610139
39 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance39 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance42 mΩ
Rated Current1170 mA
Self Resonant Frequency2320 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610168
68 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance68 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance50 mΩ
Rated Current1050 mA
Self Resonant Frequency1925 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650177
77 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance77 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance90 mΩ
Rated Current640 mA
Self Resonant Frequency2980 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650210
100 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance100 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance130 mΩ
Rated Current550 mA
Self Resonant Frequency2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610211
110 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance110 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance78 mΩ
Rated Current750 mA
Self Resonant Frequency1925 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650212
120 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance120 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance110 mΩ
Rated Current575 mA
Self Resonant Frequency2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610215
150 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance150 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance90 mΩ
Rated Current720 mA
Self Resonant Frequency1885 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650215
150 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance150 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance130 mΩ
Rated Current545 mA
Self Resonant Frequency2590 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650218
180 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance180 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance160 mΩ
Rated Current470 mA
Self Resonant Frequency2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610220
200 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance200 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance105 mΩ
Rated Current700 mA
Self Resonant Frequency1730 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650222
220 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance220 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance220 mΩ
Rated Current390 mA
Self Resonant Frequency2170 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610224
240 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance240 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance180 mΩ
Rated Current490 mA
Self Resonant Frequency1345 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610227
270 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance270 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance165 mΩ
Rated Current480 mA
Self Resonant Frequency1540 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650227
270 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance270 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance260 mΩ
Rated Current370 mA
Self Resonant Frequency2015 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610236
360 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance360 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance185 mΩ
Rated Current470 mA
Self Resonant Frequency1040 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650236
360 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance360 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance375 mΩ
Rated Current320 mA
Self Resonant Frequency1565 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610242
420 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance420 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance255 mΩ
Rated Current425 mA
Self Resonant Frequency1110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650242
420 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance420 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance460 mΩ
Rated Current270 mA
Self Resonant Frequency1810 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760247A
470 nH, ±5%, 25.2 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance470 nH
Inductance±5% 
Inductance25.2 MHz 
Q-Factor45 
DC Resistance500 mΩ
Rated Current500 mA
Self Resonant Frequency375 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650247
470 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance470 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance510 mΩ
Rated Current260 mA
Self Resonant Frequency1600 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650253
530 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance530 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance615 mΩ
Rated Current230 mA
Self Resonant Frequency1600 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760256A
560 nH, ±5%, 25.2 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance560 nH
Inductance±5% 
Inductance25.2 MHz 
Q-Factor45 
DC Resistance550 mΩ
Rated Current450 mA
Self Resonant Frequency340 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610256
560 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance560 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance270 mΩ
Rated Current390 mA
Self Resonant Frequency915 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650259
590 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance590 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance670 mΩ
Rated Current220 mA
Self Resonant Frequency1370 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610260
600 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance600 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance380 mΩ
Rated Current330 mA
Self Resonant Frequency1000 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760268A
680 nH, ±5%, 25.2 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance680 nH
Inductance±5% 
Inductance25.2 MHz 
Q-Factor35 
DC Resistance850 mΩ
Rated Current400 mA
Self Resonant Frequency188 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650270
700 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance700 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor11 
Q-Factor11 %
DC Resistance1125 mΩ
Rated Current160 mA
Self Resonant Frequency1565 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650277
770 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance770 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor12 
Q-Factor12 %
DC Resistance1250 mΩ
Rated Current155 mA
Self Resonant Frequency1240 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760282A
820 nH, ±5%, 25.2 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance820 nH
Inductance±5% 
Inductance25.2 MHz 
Q-Factor35 
DC Resistance1050 mΩ
Rated Current300 mA
Self Resonant Frequency215 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610282
820 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance820 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance450 mΩ
Rated Current300 mA
Self Resonant Frequency830 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760310A
1000 nH, ±5%, 25.2 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1000 nH
Inductance±5% 
Inductance25.2 MHz 
Q-Factor35 
DC Resistance1050 mΩ
Rated Current180 mA
Self Resonant Frequency200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610310
1000 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1000 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance700 mΩ
Rated Current230 mA
Self Resonant Frequency680 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760312A
1200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance1200 mΩ
Rated Current150 mA
Self Resonant Frequency200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762312A
1200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance1300 mΩ
Rated Current230 mA
Self Resonant Frequency280 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760315A
1500 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1500 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance1450 mΩ
Rated Current130 mA
Self Resonant Frequency200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762315A
1500 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1500 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance1650 mΩ
Rated Current220 mA
Self Resonant Frequency250 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610315
1500 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1500 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance1070 mΩ
Rated Current200 mA
Self Resonant Frequency605 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760318A
1800 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1800 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance2000 mΩ
Rated Current120 mA
Self Resonant Frequency120 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762318A
1800 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance1800 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2200 mΩ
Rated Current210 mA
Self Resonant Frequency200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760322A
2200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance1750 mΩ
Rated Current110 mA
Self Resonant Frequency110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762322A
2200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2350 mΩ
Rated Current200 mA
Self Resonant Frequency160 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610322
2200 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2200 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance400 mΩ
Rated Current350 mA
Self Resonant Frequency110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760327A
2700 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2700 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance1750 mΩ
Rated Current100 mA
Self Resonant Frequency100 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762327A
2700 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance2700 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2600 mΩ
Rated Current195 mA
Self Resonant Frequency130 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760333A
3300 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance3300 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance2000 mΩ
Rated Current210 mA
Self Resonant Frequency70 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762333A
3300 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance3300 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2850 mΩ
Rated Current185 mA
Self Resonant Frequency80 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610333
3300 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance3300 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance950 mΩ
Rated Current220 mA
Self Resonant Frequency110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760339A
3900 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance3900 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance2150 mΩ
Rated Current200 mA
Self Resonant Frequency60 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762339A
3900 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance3900 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance4000 mΩ
Rated Current180 mA
Self Resonant Frequency50 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760347A
4700 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance4700 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance1900 mΩ
Rated Current180 mA
Self Resonant Frequency50 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762347A
4700 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance4700 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance4300 mΩ
Rated Current175 mA
Self Resonant Frequency45 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610347
4700 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance4700 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance1125 mΩ
Rated Current200 mA
Self Resonant Frequency67 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760356A
5600 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance5600 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance2200 mΩ
Rated Current160 mA
Self Resonant Frequency45 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762356A
5600 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance5600 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2600 mΩ
Rated Current170 mA
Self Resonant Frequency42 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610356
5600 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance5600 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance1055 mΩ
Rated Current195 mA
Self Resonant Frequency62 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762368A
6800 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance6800 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance2800 mΩ
Rated Current165 mA
Self Resonant Frequency39 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610368
6800 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance6800 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance1380 mΩ
Rated Current170 mA
Self Resonant Frequency52 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760382A
8200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance8200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor15 
DC Resistance2400 mΩ
Rated Current120 mA
Self Resonant Frequency40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762382A
8200 nH, ±5%, 7.96 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance8200 nH
Inductance±5% 
Inductance7.96 MHz 
Q-Factor20 
DC Resistance3050 mΩ
Rated Current160 mA
Self Resonant Frequency36 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610382
8200 nH, ±5%, 7.9 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance8200 nH
Inductance±5% 
Inductance7.9 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance1550 mΩ
Rated Current150 mA
Self Resonant Frequency46 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760410A
10000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance10000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance3600 mΩ
Rated Current80 mA
Self Resonant Frequency40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762410A
10000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance10000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance3500 mΩ
Rated Current150 mA
Self Resonant Frequency33 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610410
10000 nH, ±5%, 2.5 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance10000 nH
Inductance±5% 
Inductance2.5 MHz 
Q-Factor14 
Q-Factor14 %
DC Resistance1700 mΩ
Rated Current160 mA
Self Resonant Frequency40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762415A
15000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance15000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance4000 mΩ
Rated Current130 mA
Self Resonant Frequency26 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610415
15000 nH, ±5%, 2.5 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance15000 nH
Inductance±5% 
Inductance2.5 MHz 
Q-Factor13 
Q-Factor13 %
DC Resistance3900 mΩ
Rated Current90 mA
Self Resonant Frequency30 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762418A
18000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance18000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance4500 mΩ
Rated Current120 mA
Self Resonant Frequency24 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762422A
22000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance22000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance5000 mΩ
Rated Current110 mA
Self Resonant Frequency22 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762427A
27000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance27000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance6000 mΩ
Rated Current95 mA
Self Resonant Frequency21 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762433A
33000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance33000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance6500 mΩ
Rated Current85 mA
Self Resonant Frequency20 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762439A
39000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance39000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance8500 mΩ
Rated Current60 mA
Self Resonant Frequency18 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762447A
47000 nH, ±5%, 2.52 MHz
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Inductance47000 nH
Inductance±5% 
Inductance2.52 MHz 
Q-Factor15 
DC Resistance14000 mΩ
Rated Current45 mA
Self Resonant Frequency17 MHz
Design Kit

Würth Elektronik offers several product series with different construction technology

RF Inductors selection guide

WE-KI SMT Wire Wound Ceramic Inductor
WE-KI SMT Wire Wound Ceramic Inductor
  • Inductance values from 1nH up to 1800nH
  • High Q factor
  • Up to 12.5GHz self resonant frequency
  • Up to ± 2% inductance tolerance
  • High thermal stability
  • Design Kits available for the different sizes
WE-KI HC SMT High Current Wire Wound Ceramic Inductor
WE-KI High Current Wire Wound Ceramic Inductor
  • Inductance values from 1nH up to 390nH
  • Excellent Q factor
  • High current up to 2.3 A
  • ± 2% Inductance Tolerance
  • High thermal stability
  • Design Kit available
WE-MK Multilayer Ceramic SMT Inductor
WE-MK Multilayer Ceramic Inductor
  • Inductance values from 1nH up to 470nH
  • Extremly small size (up to 0201)
  • Up to ±2% (or ±0.1nH) inductance tolerance
  • Robust structure
  • Polarity marking available 
  • Design Kits available for the different sizes
  • High thermal stability
WE-CAIR Air Coil
WE-CAIR Air Core Inductor
  • Inductance values from 1.65nH up to 538nH
  • Extremly high Q factor (Q>100)
  • Very high current up to 4 A
  • High self resonant frequency
  • Design Kit available
  • High thermal stability
WE-TCI Thinfilm Chip Inductor
WE-TCI Thin Film Inductor
  • Inductance values from 1nH up to 27nH
  • High self resonant frequency
  • Tight tolerance of 2 % (1% on request) or ± 0.1
  • Very small size (up to 0201)
WE-RFI Ferrite SMT Inductor
WE-RFI Wire Wound ferrite inductor
  • High inductance values available from 20 nH up to 47 µH
  • Operating temperature:–40 °C to +85 °C
  • Size: 0402 to 1008
  • Design Kit available  

What is the Quality Factor Q?

What is the Quality Factor Q?

The quality factor Q is an essential characteristic parameter and one of the first creterias that every RF engineer should take into account. The Q factor is given either as minimum or as typical value at a defined frequency point. In the case of Würth Elektronik, the Q factor is given as the minimum value in order to guarantee customers a reliable minimum level.

Basically, the Q factor is the ratio between the inductive reactance X<sub>L</sub> and the losses R<sub>S</sub> and is an indicator of how ideal an inductor is. For inductors with air or ceramic cores, the resistance R<sub>S</sub> is mainly due to the resistivity of the conductor in the inductor device. A higher Q factor means less losses in the component.

What is the Quality Factor Q Graph

Self Resonant Frequency

Self Resonant Frequency

Because the winding structure of any coil of wire will exhibit some capacitance, the inductor will serve as a parallel resonant tank circuit with an associated self-resonance frequency (SRF). As with conventional inductors, SRF indicates up to which frequency the inductor behaves as an inductor. 

Exactly at the SRF the inductor with its parasitic capacitance behaves as a resonance circuit with an almost infinite high impedance, only circuit losses limit the high value of the impedance. Beyond the SRF the “inductor” behaves like a capacitor 

Increasing the inductance and/or the parasitic capacitance lowers the SRF, and vice versa. This is the reason why the higher the inductance value, the lower the SRF.

In case of choke applications in which inductors are used, the best signal blocking occurs shortly below the 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. 

Self Resonant Frequency Graph

Rated current in high frequency application

Rated current in high frequency application

The rated current is specified as the maximum DC current (A or mA) that causes a defined temperature rise (i.e. ΔT = 40 K). The temperature rise plus the ambient temperature must not exceed the maximum operating temperature. For high current applications, please select the specific air core inductors: WE-KI HC, WE-ACHC and WE-CAIR.

Rated Current Graph

RF inductors and Antenna Matching

RF inductors and Antenna Matching

With the help of the Smith chart, the complex antenna feed point impedance, consisting of resistive and reactive values, can be represented graphically. In a matched antenna, the impedance at the operating frequency is close to the middle of the Smith chart and therefore close to the impedance of 50 Ω. This can be achieved by using RF inductors and RF capacitors. A pi matching network is particularly useful for this purpose, since it can be used flexibly for antenna matching from almost any other impedance. In practice, antenna matching works through iterative steps.

In addition to the WE-MCA Antennas, we offer our customers a development-accompanying antenna service. We support from the antenna selection over the antenna placement up to the antenna matching.

Webseite: www.we-online.com/antenna-matching

E-Mail: antenna.matching@we-online.com

We are also offering an Antenna Matching Design Kit that contains all the components needed for your antenna matching. This Design Kit with order code 748001, contains chip antennas WE-MCA, multilayer ceramic inductors WE-MK size 0402, high frequency chip capacitors WCAP-CSRF in size 0402 and RF coaxial cables WR-CXARY working up to 18 GHz

RF inductors and Antenna Matching

Assortments

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

Videos

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