306 E. Alondra Blvd., Gardena, CA 90247-1059 • (310) 515-1720 • FAX (310) 515-1962
www.jwmiller.com
Shielded, RF Chokes
Special Features
•Ferrite magnetic shielded for low radiation
•High Q, high reliability
•Epoxy end-fill to protect coil from extreme
environment
•Consistent body diameter
•Dielectric strength 500Vrms
•Operating temperature -55 to +105°C
•Rated current to cause 35°C temperature
rise
•Incremental current to cause 5% inductance
drop
Typical Applications
•Telecommunications
•Signal processing
•High reliability, low magnetic coupling and
densely packed board design
8250 Series
Test SRF DCR
Part L (uH) Q Freq. (MHz) (Ω) I, DC I, Incr.
Number ± 10% Min (MHz) Min. Max. (mA) (mA)
8250-R10K 0.10 50 25 400 0.026 3000 3000
8250-R12K 0.12 50 25 400 0.029 2860 2860
8250-R15K 0.15 50 25 400 0.034 2600 2600
8250-R18K 0.18 50 25 400 0.044 2300 2300
8250-R22K 0.22 50 25 400 0.056 2050 2050
8250-R27K 0.27 50 25 400 0.09 1625 1625
8250-R33K 0.33 47 25 325 0.122 1400 1400
8250-R39K 0.39 47 25 390 0.161 1220 1220
8250-R47K 0.47 47 25 264 0.218 1060 1060
8250-R56K 0.56 45 25 249 0.29 900 900
8250-R68K 0.68 43 25 221 0.382 790 790
8250-R82K 0.82 41 25 200 0.45 725 725
8250-1R0K 1.0 42 25 156 0.054 2080 2080
8250-1R2K 1.2 43 7.9 144 0.07 1840 1840
8250-1R5K 1.5 41 7.9 128 0.096 1560 1560
8250-1R8K 1.8 42 7.9 121 0.107 1480 1480
8250-2R2K 2.2 42 7.9 108 0.142 1290 1290
8250-2R7K 2.7 41 7.9 96 0.184 1130 1130
8250-3R3K 3.3 41 7.9 88 0.26 950 950
8250-3R9K 3.9 41 7.9 84 0.354 815 815
8250-4R7K 4.7 42 7.9 72 0.168 710 710
8250-5R6K 5.6 42 7.9 69 0.511 680 680
8250-6R8K 6.8 42 7.9 62 0.75 560 560
8250-8R2K 8.2 46 7.9 58 0.828 535 535
8250-100K 10 46 7.9 53 1.27 532 532
8250-120K 12 50 2.5 47 1.76 368 368
8250-150K 15 50 2.5 41 2.3 325 325
8250-180K 18 50 2.5 43 0.677 596 235
8250-220K 22 50 2.5 38 0.742 565 220
8250-270K 27 50 2.5 36 0.85 526 200
8250-330K 33 50 2.5 33 0.928 505 190
8250-390K 39 50 2.5 29.4 1.28 429 180
8250-470K 47 55 2.5 26.5 1.48 400 175
8250-560K 56 55 2.5 25 1.64 380 160
8250-680K 68 55 2.5 23 2.2 328 150
8250-820K 82 55 2.5 14 1.96 349 140
8250-101K 100 65 2.5 12 2.28 322 120
8250-121K 120 65 0.79 11.2 2.45 311 95
8250-151K 150 65 0.79 10.5 2.79 294 90
8250-181K 180 65 0.79 10 3.08 277 85
8250-221K 220 65 0.79 9.4 3.48 251 80
8250-271K 270 65 0.79 8 4.55 231 70
8250-331K 330 65 0.79 7.3 5.1 215 65
8250-391K 390 65 0.79 6.9 5.62 205 60
8250-471K 470 70 0.79 6.5 6.45 192 58
8250-561K 560 70 0.79 6 8.0 174 55
8250-681K 680 75 0.79 5.6 8.85 163 50
8250-821K 820 70 0.79 4.8 10.4 151 45
8250-103K 1000 65 0.79 4.5 12.1 139 40
8250-123K 1200 70 0.25 2.6 15.1 125 35
8250-153K 1500 70 0.25 2.5 16.8 119 33
8250-183K 1800 70 0.25 2.3 19.1 111 30
8250-223K 2200 70 0.25 2.2 22.0 103 27
8250-273K 2700 70 0.25 2.1 25.1 97 25
8250-333K 3300 70 0.25 2 33.3 85 22
8250-393K 3900 70 0.25 1.8 36.8 80 20
8250-473K 4700 70 0.25 1.7 51.2 68 19
8250-563K 5600 70 0.25 1.6 54.6 66 17
8250-683K 6800 70 0.25 1.5 62.0 62 16
8250-823K 8200 70 0.25 1.4 86.6 52 15
8250-104K 10,000 70 0.25 1.3 93.1 50 14
8250-124K 12,000 50 0.079 0.88 84.0 53 13
8250-154K 15,000 50 0.079 0.78 97.0 49 12
8250-184K 18,000 50 0.079 0.72 104.0 48 10
8250-224K 22,000 50 0.079 0.57 145.0 40 9
8250-274K 27,000 50 0.079 0.46 195.0 34 8
8250-334K 33,000 50 0.079 0.42 222.0 32 7.5
8250-394K 39,000 50 0.079 0.42 242.0 31 6
8250-474K 47,000 50 0.079 0.37 317.0 27 5.5
8250-564K 56,000 50 0.079 0.36 362.0 25 5
8250-684K 68,000 50 0.079 0.35 410.0 24 4
8250-824K 82,000 50 0.079 0.34 440.0 23 3.5
8250-105K 100,000 50 0.079 0.32 484.0 22 3
0.020
1.0 0.45
min. max.
0.164
max.
