Features
■ Current rating up to 1.2 A
■ Dielectric strength: 500 VRMS
■ RoHS compliant*
Applications
■ DC/DC converters
■ Power supplies
■ General use
78F Series Conformal Coated RF Choke
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
*RoHS COMPLIANT
Electrical Specifi cations (@ 25 °C)
Part Number Value (μH)
Q
Min.
Test
Frequency
(MHz)
SRF
(MHz)
Min.
DCR
(Ω)
Max.
IDC
(mA)
Max.
78FR10K-RC 0.10 ±10 % 20 25 400 0.060 1200
78FR12K-RC 0.12 ±10 % 20 25 400 0.070 1200
78FR15K-RC 0.15 ±10 % 20 25 380 0.070 1200
78FR18K-RC 0.18 ±10 % 20 25 380 0.073 1150
78FR22K-RC 0.22 ±10 % 40 25 380 0.075 1150
78FR27K-RC 0.27 ±10 % 40 25 360 0.085 1110
78FR33K-RC 0.33 ±10 % 40 25 335 0.095 1110
78FR39K-RC 0.39 ±10 % 40 25 310 0.10 1000
78FR47K-RC 0.47 ±10 % 40 25 270 0.11 1000
78FR56K-RC 0.56 ±10 % 40 25 245 0.12 950
78FR68K-RC 0.68 ±10 % 40 25 230 0.13 900
78FR82K-RC 0.82 ±10 % 40 25 200 0.14 875
78F1R0K-RC 1.0 ±10 % 40 25 180 0.15 815
78F1R2K-RC 1.2 ±10 % 40 7.9 165 0.18 740
78F1R5K-RC 1.5 ±10 % 50 7.9 150 0.20 700
78F1R8K-RC 1.8 ±10 % 50 7.9 125 0.23 655
78F2R2K-RC 2.2 ±10 % 50 7.9 110 0.25 630
78F2R7K-RC 2.7 ±10 % 50 7.9 95 0.28 595
78F3R3J-RC 3.3 ±5 % 50 7.9 60 0.30 575
78F3R9J-RC 3.9 ±5 % 45 7.9 50 0.32 555
78F4R7J-RC 4.7 ±5 % 45 7.9 38 0.35 530
78F5R6J-RC 5.6 ±5 % 45 7.9 32 0.40 500
78F6R8J-RC 6.8 ±5 % 40 7.9 28 0.45 470
78F8R2J-RC 8.2 ±5 % 40 7.9 20 0.55 425
78F100J-RC 10 ±5 % 40 7.9 18 0.75 370
78F120J-RC 12 ±5 % 45 2.5 16 0.80 350
78F150J-RC 15 ±5 % 50 2.5 16 0.93 335
78F180J-RC 18 ±5 % 50 2.5 15 1.00 315
78F220J-RC 22 ±5 % 50 2.5 13 1.20 285
78F270J-RC 27 ±5 % 50 2.5 11 1.35 270
78F330J-RC 33 ±5 % 50 2.5 10 1.50 255
78F390J-RC 39 ±5 % 50 2.5 9.50 1.70 240
78F470J-RC 47 ±5 % 60 2.5 8.50 2.70 205
78F560J-RC 56 ±5 % 60 2.5 7.50 2.95 195
78F680J-RC 68 ±5 % 60 2.5 6.50 3.30 185
78F820J-RC 82 ±5 % 60 2.5 6.00 3.60 175
78F101J-RC 100 ±5 % 60 2.5 5.50 4.10 165
78F121J-RC 120 ±5 % 60 0.79 5.40 4.70 160
78F151J-RC 150 ±5 % 60 0.79 4.75 5.40 150
78F181J-RC 180 ±5 % 60 0.79 4.35 6.00 140
78F221J-RC 220 ±5 % 60 0.79 4.00 6.80 130
78F271J-RC 270 ±5 % 60 0.79 3.70 7.70 120
78F331J-RC 330 ±5 % 60 0.79 3.40 11.1 100
78F391J-RC 390 ±5 % 60 0.79 2.80 12.6 95
78F471J-RC 470 ±5 % 60 0.79 2.55 14.0 90
78F561J-RC 560 ±5 % 60 0.79 2.35 15.5 85
78F681J-RC 680 ±5 % 60 0.79 2.00 25.3 68
78F821J-RC 820 ±5 % 60 0.79 1.50 27.5 65
78F102J-RC 1000 ±5 % 60 0.79 1.20 31.4 60
General Specifi cations
Temperature Rise .......................... 35 °C
....................................at rated current
Operating Temperature Range
............................... -55 °C to +105 °C
(including temperature rise)
Storage Temperature Range
............................... -55 °C to +105 °C
Materials
Core Material .................. Ferrite DR core
Wire ....................Enamelled copper wire
Terminal ....................................Cu/Ni/Sn
Coating .................................Epoxy resin
Packaging
Standard ................ 5000 pcs. per bag
Optional ..... 5000 pcs. per 14-inch reel
Electrical Schematic
How to Order
78F 100 J __ - RC
Model
Value Code (see table)
Tolerance Code (see table)
Packaging
Blank = 5,000 pcs./bag
-TR = 5,000 pcs./14” reel
RoHS Compliant
Examples:
• 78F1R0K-RC = 1.0 mH Model 78F
packaged 5,000 pcs. per bag.
• 78F100J-TR-RC = 10 mH Model 78F
packaged 5,000 pcs. per reel.
DIMENSIONS: MM
(INCHES)
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
78F Series Conformal Coated RF Choke
Product Dimensions Typical Part Marking - EIA Color Code
REV. 10/11
25.40
(1.0)
7.11
(0.28)
MAX.
MAX.
MIN.
25.40
(1.0)
MIN.
2.79
(0.11) 0.51
(0.020)
1st signifi cant fi gure (Blue)
2nd signifi cant fi gure (Gray)
Multiplier (Gold)
Tolerance (Gold)
Example for 6.8 µH, ±5 %
Example for 270 µH, ±5 %
Color
1st & 2nd
Significant
Figure Multiplier Tolerance
Silver
Gold
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White
0
1
2
3
4
5
6
7
8
9
0.01
0.1
1
10
100
1000
±10 %
±5 %
1st signifi cant fi gure (Red)
2nd signifi cant fi gure (Purple)
Multiplier (Brown)
Tolerance (Gold)
