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
Inductance
2
(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
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_
number
1
Q
min
3
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 typ
4
(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 max
5
(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
Irms
6
(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
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).
7″ machine-ready reel. EIA-481 embossed plastic
tape (600 per full reel).
Less than full reel. In tape, but not machine-ready.
To have a leader and trailer added ($25 charge), use
code letter C instead.
13″ machine-ready reel. EIA-481 embossed plastic
tape. Factory order only, not stocked (2200 per full
reel).
Termination: L
=
Packaging:
C
=
B
=
D
=
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
5 6
8 10
10
1
10
Frequency (MHz)
100
DC Current (mA)
1000
Irms Derating
120
110
100
Percent of rated
I
rms
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 <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
One per billion hours / one billion hours, calculated per Telcordia SR-332
Packaging
600/7″ reel; 2200/13″ reel. Plastic tape: 12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 3.7 mm pocket depth
PCB washing
Only pure water or alcohol recommended
B
overall
F
Ambient temperature (°C)
25°C
C
I
J
H
A
G
F
E
terminal
D
Terminal wraparound:
approx 0.015/0,38 both ends
I
Recommended
Land Pattern
H
I
1,14
J
3,00 mm
A
max
4,95
B
max
3,81
C
max
3,43
D
ref
1,78
E
2,54
F
0,64
G
3,25
0.195 0.150 0.135 0.070 0.100 0.025 0.128 0.120 0.045 0.118 inches
3,05
Specifications subject to change without notice.
Please check our website for latest information.
Document 106-2
Revised 10/06/08
© Coilcraft, Inc. 2009
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