306 E. Alondra Blvd. Gardena, CA 90247-1059 • Phone (310) 515-1720 • FAX (310) 515-1962
wwww.jwmiller.com
20.4
Varnished RF Chokes
Special Features
• High Q, high self-resonant
frequency
• High voltage application on phenolic
and ferrite components
• Universal wound
• Low cost
• Varnish coated
• Operating temperature:
phenolic -55 to +125°C;
iron, ferrite -55 to +105°C
Notes
* Current to cause 35°C
maximum temperature rise
70F Series continued
Part
Number
L (µH)
±5%
Q
Min.
Test
Freq.
(MHz)
SRF
(MHz)
Min.
DCR
Ω
Max.
I, DC*
(mA)
Dim.
A
Max
Dim.
B
±0.03
Core
Material
70F394AI 390 45 0.79 2.0 15.8 97 0.18 0.25 Iron
70F474AI 470 35 0.79 1.8 16.3 95 0.18 0.25 Iron
70F504AI 500 49 0.79 1.8 18.0 91 0.19 0.25 Iron
70F564AI 560 41 0.79 1.7 19.2 88 0.19 0.25 Iron
70F684AI 680 37 0.79 1.6 19.8 87 0.2 0.25 Iron
70F754AI 750 40 0.79 1.6 22.9 80 0.21 0.25 Iron
70F824AI 820 33 0.79 1.6 22.9 80 0.21 0.25 Iron
70F914AI 910 32 0.79 1.4 24.0 79 0.22 0.25 Iron
70F103AI 1000 30 0.79 1.4 24.0 79 0.22 0.25 Iron
70F123AI 1200 34 0.25 1.2 33.6 66 0.22 0.25 Iron
70F153AI 1500 40 0.25 1.1 37.2 63 0.22 0.25 Iron
70F183AI 1800 40 0.25 0.96 42.0 59 0.23 0.25 Iron
70F223AI 2200 40 0.25 0.96 45.6 57 0.24 0.25 Iron
70F253AI 2500 48 0.25 0.96 45.6 57 0.26 0.38 Iron
70F273AI 2700 50 0.25 0.88 45.6 57 0.26 0.38 Iron
70F333AI 3300 52 0.25 0.80 51.6 53 0.26 0.38 Iron
70F393AI 3900 53 0.25 0.76 57.6 51 0.27 0.38 Iron
70F473AI 4700 49 0.25 0.68 64.8 48 0.28 0.38 Iron
70F563AI 5600 53 0.25 0.68 69.6 46 0.3 0.38 Iron
70F683AI 6800 51 0.25 0.64 78 43 0.31 0.38 Iron
70F753AI 7500 49 0.25 0.60 85.2 41 0.31 0.38 Iron
70F823AI 8200 48 0.25 0.60 92.4 40 0.33 0.38 Iron
70F913AI 9100 52 0.25 0.56 98.4 39 0.33 0.38 Iron
70F102AI 10,000 41 0.25 0.52 101 38 0.33 0.38 Iron
70F122AI 12,000 46 0.079 0.36 100 50 0.3 0.50 Iron
70F152AI 15,000 50 0.079 0.32 113 47 0.3 0.50 Iron
70F182AI 18,000 49 0.079 0.29 128 44 0.32 0.50 Iron
70F222AI 22,000 50 0.079 0.27 144 41 0.33 0.50 Iron
70F252AF 25,000 59 0.079 0.25 115 46 0.34 0.63 Ferrite
70F272AF 27,000 61 0.079 0.244 120 45 0.35 0.63 Ferrite
70F332AF 33,000 61 0.079 0.232 134 43 0.35 0.63 Ferrite
70F392AF 39,000 59 0.079 0.22 147 41 0.37 0.63 Ferrite
70F472AF 47,000 57 0.079 0.206 168 38 0.38 0.63 Ferrite
70F502AF 50,000 57 0.079 0.196 175 37 0.4 0.63 Ferrite
70F562AF 56,000 57 0.079 0.188 189 36 0.4 0.63 Ferrite
70F682AF 68,000 57 0.079 0.18 215 34 0.41 0.63 Ferrite
70F752AF 75,000 53 0.079 0.174 222 33 0.43 0.63 Ferrite
70F822AF 82,000 50 0.079 0.168 238 32 0.43 0.63 Ferrite
70F912AF 91,000 51 0.079 0.166 250 31 0.43 0.63 Ferrite
70F101AF 100,000 48 0.079 0.157 278 29 0.44 0.63 Ferrite
L tested
@ 1KHz
70F121AF 120,000 46 0.025 0.084 288 48 0.48 0.88 Ferrite
70F151AF 150,000 49 0.025 0.077 328 44 0.50 0.88 Ferrite
70F181AF 180,000 51 0.025 0.075 374 41 0.52 0.88 Ferrite
70F221AF 220,000 51 0.025 0.07 424 39 0.54 0.88 Ferrite
70F251AF 250,000 52 0.025 0.065 468 37 0.55 0.88 Ferrite
70F271AF 270,000 53 0.025 0.062 490 36 0.57 0.88 Ferrite
70F331AF 330,000 54 0.025 0.06 540 34 0.58 0.88 Ferrite
70F391AF 390,000 54 0.025 0.056 617 33 0.6 0.88 Ferrite
70F471AF 470,000 55 0.025 0.054 704 30 0.61 0.88 Ferrite
70F501AF 500,000 53 0.025 0.052 736 30 0.63 0.88 Ferrite
Also available as RoHS compliant.
1.25
B
A
Dia.
0.025 for 0.1-22,000uh
0.032 for 25,000-500,000uh
Dimensions: Inches