Features
■ Formerly model
■ Current rating up to 920 mA
■ Inductance range: 1.0 μH to 1,000 μH
■ RoHS compliant*
Applications
■ DC/DC converters
■ Power supplies
■ General use
77F Series Conformal Coated RF Choke
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Electrical Specifi cations (@ 25 °C)
Bourns Part
No.
Inductance
Q
Min.
Test
Frequency
(MHz)
SRF
(MHz)
Min.
DCR
(Ω)
Max.
Idc
(mA)(μH) Tol. (%)
77F1R0K-RC 1.0 ±10 50 25.2 157 0.17 920
77F1R2K-RC 1.2 ±10 50 7.96 144 0.18 880
77F1R5K-RC 1.5 ±10 50 7.96 131 0.20 830
77F1R8K-RC 1.8 ±10 50 7.96 121 0.22 790
77F2R2K-RC 2.2 ±10 50 7.96 110 0.24 750
77F2R7K-RC 2.7 ±10 60 7.96 100 0.25 720
77F3R3K-RC 3.3 ±10 60 7.96 94 0.30 670
77F3R9K-RC 3.9 ±10 60 7.96 86 0.35 640
77F4R7K-RC 4.7 ±10 70 7.96 80 0.40 620
77F5R6K-RC 5.6 ±10 70 7.96 74 0.45 590
77F6R8K-RC 6.8 ±10 75 7.96 68 0.50 550
77F8R2K-RC 8.2 ±10 80 7.96 53 0.52 530
77F100K-RC 10 ±10 85 7.96 40 0.65 500
77F120K-RC 12 ±10 75 2.52 34 0.70 480
77F150K-RC 15 ±10 70 2.52 20 0.75 460
77F180K-RC 18 ±10 60 2.52 14 0.80 430
77F220K-RC 22 ±10 60 2.52 9.9 0.90 410
77F270K-RC 27 ±10 50 2.52 7.6 1.00 390
77F330J-RC 33 ±5 50 2.52 6.5 1.10 370
77F390J-RC 39 ±5 50 2.52 6.5 1.20 350
77F470J-RC 47 ±5 45 2.52 6.3 1.30 340
77F560J-RC 56 ±5 45 2.52 6.2 1.50 320
77F680J-RC 68 ±5 40 2.52 5.7 1.80 305
77F820J-RC 82 ±5 35 2.52 5.3 2.00 290
77F101J-RC 100 ±5 30 2.52 4.8 2.50 275
77F121J-RC 120 ±5 60 0.796 3.8 3.0 185
77F151J-RC 150 ±5 60 0.796 3.5 4.0 175
77F181J-RC 180 ±5 60 0.796 3.0 4.5 165
77F221J-RC 220 ±5 60 0.796 2.8 5.0 155
77F271J-RC 270 ±5 60 0.796 2.6 6.0 145
77F331J-RC 330 ±5 60 0.796 2.4 6.5 137
77F391J-RC 390 ±5 55 0.796 2.0 7.5 133
77F471J-RC 470 ±5 50 0.796 1.8 8.5 126
77F561J-RC 560 ±5 50 0.796 1.6 9.5 120
77F681J-RC 680 ±5 45 0.796 1.6 12.0 113
77F821J-RC 820 ±5 45 0.796 1.4 14.0 105
77F102J-RC 1000 ±5 50 0.796 1.2 20.0 100
General Specifi cations
Temperature Rise ................ 35 °C at Idc
Operating Temperature
............................... -55 °C to +105 °C
Storage Temperature
............................... -55 °C to +105 °C
Dielectric Strength ................... 500 Vrms
Materials
Core .............................................. Ferrite
Wire .............................Polyester copper
Terminal Coating .............Sn-Ag-Cu alloy
Coating .................................Epoxy resin
Packaging ..... 5000 pcs. per 14-inch reel
How to Order
77F 151J - TR - RC
Model
Value Code
(See table)
Packaging Code
TR = 5000 pcs./14-inch reel
Compliance Code
RC = RoHS compliant*
Example:
77F102J-TR-RC = 1000 μH packaged
5000 pcs./14-inch reel.
Electrical Schematic
