Document 106-1
Chip Inductors – 1812LS Series (4532)
With inductance values up to 1000 µH, these are our
highest rated chip inductors. Their ferrite core allows higher
current ratings and lower DC resistance. These parts can
be ordered with terminations that make them compliant with
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
3
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
RoHS standards. Coilcraft
Designer’s Kit C114
contains
samples of all 5% tolerance parts. To order, contact
Coilcraft or purchase on-line at
http://order.coilcraft.com.
Part
1812LS-123X_B_
1812LS-153X_B_
1812LS-183X_B_
1812LS-223X_B_
1812LS-273X_B_
1812LS-333X_B_
1812LS-393X_B_
1812LS-473X_B_
1812LS-563X_B_
1812LS-683X_B_
1812LS-823X_B_
1812LS-104X_B_
1812LS-124X_B_
1812LS-154X_B_
1812LS-184X_B_
1812LS-224X_B_
1812LS-274X_B_
1812LS-334X_B_
1812LS-394X_B_
1812LS-474X_B_
1812LS-564X_B_
1812LS-684X_B_
1812LS-824X_B_
1812LS-105X_B_
number
1
Q
min
4
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 min
5
(MHz)
55
45
37
32
27
23
19
16
13
10
9.0
8.5
8.5
8.5
8.0
6.0
5.0
4.5
3.5
3.0
2.0
1.9
1.6
1.5
DCR max
6
(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
7
(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, specify
tolerance, termination
and
packaging
codes:
1812LS-105XJBC
5%
K
= 10%
(Table shows stock tolerances in bold.)
Standard Ag/Pd/Pt
L
= RoHS compliant Ag/Pd/Pt
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).
Tolerance:
J
=
Termination:
B
=
Packaging: C
=
B
=
D
=
2. Inductance at 2.5 MHz measured using Agilent/HP 4286A and Coilcraft
SMD-A fixture with Coilcraft-provided correlation pieces. Inductance at
0.79 MHz measured using Agilent/HP 4192A and Coilcraft SMD-B test
fixture.
3. Tolerances in bold are stocked for immediate shipment.
4. Q read directly on Agilent/HP 4192A LF impedance analyzer and
Coilcraft SMD-B test fixture.
5. SRF measured using Agilent/HP 8753D network analyzer and Coilcraft
SMD-D test fixture.
6. DCR measured on Cambridge Technology micro-ohmmeter.
7. Average current for 15°C temperature rise from 25°C.
8. Operating temperature range
−40°C
to +85°C.
9. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
See Color Coding section for part marking data.
Specifications subject to change without notice.
Document 106-1
Revised 11/13/03
Document 106-2
1812LS (4532) Chip Inductors
Typical Q vs Frequency
60
50
270 µH
Typical L vs Current
10000
12 µH
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
B
overall
F
C
I
J
H
A
G
F
E
terminal
D
Terminal wraparound:
approx 0.015/0,38 both ends
I
Recommended
Land Pattern
G
H
3,05
I
1,14
J
0.118
3,00
A max B max C max
0.195
4,95
0.150
3,81
0.135
3,43
D ref
0.070
1,78
E
0.100
2,54
F
0.025
0,64
0.128 0.120 0.045
3,25
Weight:
142 – 171 mg
Tape and reel:
600/7″ reel; 2200/13″ reel 12 mm tape width
For packaging data see Tape and Reel Specifications section.
Specifications subject to change without notice.
Document 106-2
Revised 11/13/03
