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 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 Active i | Production is active. Expected lifetime: >10 years.
Inductance 20 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 25 mΩ
Rated Current 1080 mA
Self Resonant Frequency 7720 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650130
30 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 30 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 35 mΩ
Rated Current 900 mA
Self Resonant Frequency 3800 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650133
33 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 33 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 35 mΩ
Rated Current 900 mA
Self Resonant Frequency 3875 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650136
36 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 36 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 40 mΩ
Rated Current 850 mA
Self Resonant Frequency 3875 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610139
39 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 39 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 42 mΩ
Rated Current 1170 mA
Self Resonant Frequency 2320 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610168
68 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 68 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 50 mΩ
Rated Current 1050 mA
Self Resonant Frequency 1925 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650177
77 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 77 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 90 mΩ
Rated Current 640 mA
Self Resonant Frequency 2980 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650210
100 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 100 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 130 mΩ
Rated Current 550 mA
Self Resonant Frequency 2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610211
110 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 110 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 78 mΩ
Rated Current 750 mA
Self Resonant Frequency 1925 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650212
120 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 120 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 110 mΩ
Rated Current 575 mA
Self Resonant Frequency 2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610215
150 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 150 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 90 mΩ
Rated Current 720 mA
Self Resonant Frequency 1885 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650215
150 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 150 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 130 mΩ
Rated Current 545 mA
Self Resonant Frequency 2590 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650218
180 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 180 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 160 mΩ
Rated Current 470 mA
Self Resonant Frequency 2955 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610220
200 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 200 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 105 mΩ
Rated Current 700 mA
Self Resonant Frequency 1730 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650222
220 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 220 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 220 mΩ
Rated Current 390 mA
Self Resonant Frequency 2170 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610224
240 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 240 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 180 mΩ
Rated Current 490 mA
Self Resonant Frequency 1345 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610227
270 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 270 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 165 mΩ
Rated Current 480 mA
Self Resonant Frequency 1540 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650227
270 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 270 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 260 mΩ
Rated Current 370 mA
Self Resonant Frequency 2015 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610236
360 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 360 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 185 mΩ
Rated Current 470 mA
Self Resonant Frequency 1040 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650236
360 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 360 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 375 mΩ
Rated Current 320 mA
Self Resonant Frequency 1565 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610242
420 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 420 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 255 mΩ
Rated Current 425 mA
Self Resonant Frequency 1110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650242
420 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 420 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 460 mΩ
Rated Current 270 mA
Self Resonant Frequency 1810 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760247A
470 nH, ±5%, 25.2 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 470 nH
Inductance ±5% 
Inductance 25.2 MHz 
Q-Factor 45 
DC Resistance 500 mΩ
Rated Current 500 mA
Self Resonant Frequency 375 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650247
470 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 470 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 510 mΩ
Rated Current 260 mA
Self Resonant Frequency 1600 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650253
530 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 530 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 615 mΩ
Rated Current 230 mA
Self Resonant Frequency 1600 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760256A
560 nH, ±5%, 25.2 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 560 nH
Inductance ±5% 
Inductance 25.2 MHz 
Q-Factor 45 
DC Resistance 550 mΩ
Rated Current 450 mA
Self Resonant Frequency 340 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610256
560 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 560 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 270 mΩ
Rated Current 390 mA
Self Resonant Frequency 915 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650259
590 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 590 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 670 mΩ
Rated Current 220 mA
Self Resonant Frequency 1370 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610260
600 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 600 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 380 mΩ
Rated Current 330 mA
Self Resonant Frequency 1000 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760268A
680 nH, ±5%, 25.2 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 680 nH
Inductance ±5% 
Inductance 25.2 MHz 
Q-Factor 35 
DC Resistance 850 mΩ
Rated Current 400 mA
Self Resonant Frequency 188 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650270
700 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 700 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 11 
Q-Factor 11 %
DC Resistance 1125 mΩ
Rated Current 160 mA
Self Resonant Frequency 1565 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447650277
770 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 770 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 12 
Q-Factor 12 %
DC Resistance 1250 mΩ
Rated Current 155 mA
Self Resonant Frequency 1240 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760282A
820 nH, ±5%, 25.2 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 820 nH
Inductance ±5% 
Inductance 25.2 MHz 
Q-Factor 35 
DC Resistance 1050 mΩ
Rated Current 300 mA
Self Resonant Frequency 215 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610282
820 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 820 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 450 mΩ
Rated Current 300 mA
Self Resonant Frequency 830 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760310A
1000 nH, ±5%, 25.2 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1000 nH
Inductance ±5% 
Inductance 25.2 MHz 
Q-Factor 35 
DC Resistance 1050 mΩ
Rated Current 180 mA
Self Resonant Frequency 200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610310
1000 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1000 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 700 mΩ
Rated Current 230 mA
Self Resonant Frequency 680 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760312A
1200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 1200 mΩ
Rated Current 150 mA
Self Resonant Frequency 200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762312A
1200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 1300 mΩ
Rated Current 230 mA
Self Resonant Frequency 280 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760315A
1500 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1500 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 1450 mΩ
Rated Current 130 mA
Self Resonant Frequency 200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762315A
1500 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1500 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 1650 mΩ
Rated Current 220 mA
Self Resonant Frequency 250 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610315
1500 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1500 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 1070 mΩ
Rated Current 200 mA
Self Resonant Frequency 605 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760318A
1800 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1800 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 2000 mΩ
Rated Current 120 mA
Self Resonant Frequency 120 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762318A
1800 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 1800 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2200 mΩ
Rated Current 210 mA
Self Resonant Frequency 200 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760322A
2200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 2200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 1750 mΩ
Rated Current 110 mA
Self Resonant Frequency 110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762322A
2200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 2200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2350 mΩ
Rated Current 200 mA
Self Resonant Frequency 160 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610322
2200 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 2200 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 400 mΩ
Rated Current 350 mA
Self Resonant Frequency 110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760327A
2700 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 2700 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 1750 mΩ
Rated Current 100 mA
Self Resonant Frequency 100 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762327A
2700 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 2700 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2600 mΩ
Rated Current 195 mA
Self Resonant Frequency 130 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760333A
3300 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 3300 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 2000 mΩ
Rated Current 210 mA
Self Resonant Frequency 70 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762333A
3300 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 3300 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2850 mΩ
Rated Current 185 mA
Self Resonant Frequency 80 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610333
3300 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 3300 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 950 mΩ
Rated Current 220 mA
Self Resonant Frequency 110 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760339A
3900 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 3900 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 2150 mΩ
Rated Current 200 mA
Self Resonant Frequency 60 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762339A
3900 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 3900 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 4000 mΩ
Rated Current 180 mA
Self Resonant Frequency 50 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760347A
4700 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 4700 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 1900 mΩ
Rated Current 180 mA
Self Resonant Frequency 50 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762347A
4700 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 4700 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 4300 mΩ
Rated Current 175 mA
Self Resonant Frequency 45 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610347
4700 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 4700 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 1125 mΩ
Rated Current 200 mA
Self Resonant Frequency 67 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760356A
5600 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 5600 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 2200 mΩ
Rated Current 160 mA
Self Resonant Frequency 45 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762356A
5600 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 5600 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2600 mΩ
Rated Current 170 mA
Self Resonant Frequency 42 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610356
5600 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 5600 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 1055 mΩ
Rated Current 195 mA
Self Resonant Frequency 62 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762368A
6800 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 6800 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 2800 mΩ
Rated Current 165 mA
Self Resonant Frequency 39 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610368
6800 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 6800 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 1380 mΩ
Rated Current 170 mA
Self Resonant Frequency 52 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760382A
8200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 8200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 15 
DC Resistance 2400 mΩ
Rated Current 120 mA
Self Resonant Frequency 40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762382A
8200 nH, ±5%, 7.96 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 8200 nH
Inductance ±5% 
Inductance 7.96 MHz 
Q-Factor 20 
DC Resistance 3050 mΩ
Rated Current 160 mA
Self Resonant Frequency 36 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610382
8200 nH, ±5%, 7.9 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 8200 nH
Inductance ±5% 
Inductance 7.9 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 1550 mΩ
Rated Current 150 mA
Self Resonant Frequency 46 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744760410A
10000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 10000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 3600 mΩ
Rated Current 80 mA
Self Resonant Frequency 40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762410A
10000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 10000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 3500 mΩ
Rated Current 150 mA
Self Resonant Frequency 33 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610410
10000 nH, ±5%, 2.5 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 10000 nH
Inductance ±5% 
Inductance 2.5 MHz 
Q-Factor 14 
Q-Factor 14 %
DC Resistance 1700 mΩ
Rated Current 160 mA
Self Resonant Frequency 40 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762415A
15000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 15000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 4000 mΩ
Rated Current 130 mA
Self Resonant Frequency 26 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
7447610415
15000 nH, ±5%, 2.5 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 15000 nH
Inductance ±5% 
Inductance 2.5 MHz 
Q-Factor 13 
Q-Factor 13 %
DC Resistance 3900 mΩ
Rated Current 90 mA
Self Resonant Frequency 30 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762418A
18000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 18000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 4500 mΩ
Rated Current 120 mA
Self Resonant Frequency 24 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762422A
22000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 22000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 5000 mΩ
Rated Current 110 mA
Self Resonant Frequency 22 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762427A
27000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 27000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 6000 mΩ
Rated Current 95 mA
Self Resonant Frequency 21 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762433A
33000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 33000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 6500 mΩ
Rated Current 85 mA
Self Resonant Frequency 20 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762439A
39000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 39000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 8500 mΩ
Rated Current 60 mA
Self Resonant Frequency 18 MHz
Design Kit
WE-RFI Ferrite SMT Inductor
744762447A
47000 nH, ±5%, 2.52 MHz
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Inductance 47000 nH
Inductance ±5% 
Inductance 2.52 MHz 
Q-Factor 15 
DC Resistance 14000 mΩ
Rated Current 45 mA
Self Resonant Frequency 17 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