Document 106-1
Chip Inductors – 1812LS Series (4532)
• Highest inductance values of all our chip inductors • Ferrite construction for high current handling • Inductance values: 12 – 1000 µH
Inductance2 (µH) 12 15 18 22 27 33 39 47 56 68 82 100 120 150 180 220 270 330 390 470 560 680 820 1000 Percent tolerance 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Request free evaluation samples by contacting Coilcraft or visiting www.coilcraft.com.
Part number1 1812LS-123XJL_ 1812LS-153XJL_ 1812LS-183XJL_ 1812LS-223XJL_ 1812LS-273XJL_ 1812LS-333XJL_ 1812LS-393XJL_ 1812LS-473XJL_ 1812LS-563XJL_ 1812LS-683XJL_ 1812LS-823XJL_ 1812LS-104XJL_ 1812LS-124XJL_ 1812LS-154XJL_ 1812LS-184XJL_ 1812LS-224XJL_ 1812LS-274XJL_ 1812LS-334XJL_ 1812LS-394XJL_ 1812LS-474XJL_ 1812LS-564XJL_ 1812LS-684XJL_ 1812LS-824XJL_ 1812LS-105XJL_
Q min3 42 42 45 45 45 45 45 42 42 40 40 40 33 36 36 38 38 38 38 38 33 33 30 30
Test freq (MHz) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79 0.79
SRF typ4 (MHz) 85 70 52 58 46 40 30 24 20 16 13.5 12.0 14.5 11.5 9.3 7.6 8.3 7.0 5.2 4.4 2.8 2.3 2.1 1.9
DCR max5 (Ohms) 2.0 2.5 2.8 3.2 3.6 4.0 4.5 5.0 5.5 6.0 7.0 8.0 11.5 13.0 14.2 16.2 20.5 22.5 24.5 26.5 28.5 38.0 41.0 44.0
Irms6 (mA) 310 290 270 260 240 230 210 200 190 180 170 150 135 125 120 115 105 100 90 85 75 60 55 50
1. When ordering, please specify termination and packaging codes: 1812LS-105XJLC Termination: L = RoHS compliant silver-palladium-platinum-glass frit. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic tape (600 per full reel). B = Less than full reel. In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter C instead. D = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (2200 per full reel).
2. Inductance at 2.5 MHz measured using an Agilent/HP 4286A and a Coilcraft SMD-A fixture with Coilcraft-provided correlation pieces. Inductance at 0.79 MHz measured using an Agilent/HP 4192A and Coilcraft SMD-B test fixture. 3. Q read at test frequency directly on an Agilent/HP 4192A LF impedance analyzer and a Coilcraft SMD-B test fixture. 4. SRF measured using an Agilent/HP 8753D network analyzer and a Coilcraft SMD-D test fixture. 5. DCR measured on a Cambridge Technology micro-ohmmeter. 6. Current that causes a 15°C temperature rise from 25°C ambient. Because of their open construction, these parts will not saturate. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. See Color Coding section for part marking data.
Specifications subject to change without notice. Please check our website for latest information.
Document 106-1
Revised 10/06/08
© Coilcraft, Inc. 2009
Document 106-2
1812LS (4532) Chip Inductors
Typical Q vs Frequency
60 50
270 µH 12 µH
Typical L vs Current
10000
Inductance (µH)
40
18 µH 33 µH 82 µH
1000 µH
1000
330 µH
Q Factor
30 20 10
560 µH 1000 µH
100 µH
100
33 µH
2.5 MHz 0.79 MHz
12 µH
0 0.1 0.2 0.3 0.4 0.6 1 2 3 4 56 8 10
10
1
10
Frequency (MHz)
100 DC Current (mA)
1000
Irms Derating
120 110 100
Percent of rated Irms
90 80 70 60 50 40 30 20 10 0 -40 -20 0 20 40 60 80 100 120
Designer’s Kit C314 contains 10 of each value Core material Ferrite Terminations RoHS compliant silver-palladium-platinum-glass frit. Other terminations available at additional cost. Weight 142 – 171 mg Ambient temperature –40°C to +85°C with Irms current, +85°C to +100°C with derated current Storage temperature Component: –40°C to +100°C. Packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Temperature Coefficient of Inductance (TCL) +200 to +700 ppm/°C Moisture Sensitivity Level (MSL) 1 (unlimited floor life at
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