Document 105-1
Chip Inductors – 1812CS Series (4532)
Coilcraft 1812CS ceramic chip inductors are ideal for
applications requiring mid-range inductance. The SRFs
of the parts in this series are up to 3 times higher than
those of commonly available 1812 chip inductors made
on ferrite cores.
Inductance
2
(µH)
1.0 @ 7.9 MHz
1.2 @ 7.9 MHz
1.5 @ 7.9 MHz
1.8 @ 7.9 MHz
2.2 @ 7.9 MHz
2.7 @ 7.9 MHz
3.3 @ 7.9 MHz
3.9 @ 7.9 MHz
4.7 @ 7.9 MHz
5.6 @ 7.9 MHz
6.8 @ 7.9 MHz
8.2 @ 7.9 MHz
10.0 @ 7.9 MHz
12.0 @ 2.5 MHz
15.0 @ 2.5 MHz
18.0 @ 2.5 MHz
22.0 @ 2.5 MHz
27.0 @ 2.5 MHz
33.0 @ 2.5 MHz
Percent
tolerance
3
10,5
10,5
10,5,2
10,5
10,5
10,5
10,5
10,5,2
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5,2
10,5
10,5,2
These parts can be ordered with Ag/Pd/Pt terminations
that make them compliant with RoHS lead free standards.
To request free evaluation samples, contact Coilcraft or
visit
www.coilcraft.com.
SRF min
5
(MHz)
310
230
210
190
170
160
145
130
115
100
90
80
70
60
50
45
40
30
20
DCR max
6
(Ohms)
1.2
1.2
1.6
2.0
2.2
3.2
3.8
5.0
5.4
5.7
6.6
7.0
7.7
8.7
9.6
10.5
11.5
12.5
13.5
Irms
7
(mA)
480
480
430
380
340
300
270
240
230
220
210
200
190
180
170
160
155
150
145
Part
1812CS-102X_B_
1812CS-122X_B_
1812CS-152X_B_
1812CS-182X_B_
1812CS-222X_B_
1812CS-272X_B_
1812CS-332X_B_
1812CS-392X_B_
1812CS-472X_B_
1812CS-562X_B_
1812CS-682X_B_
1812CS-822X_B_
1812CS-103X_B_
1812CS-123X_B_
1812CS-153X_B_
1812CS-183X_B_
1812CS-223X_B_
1812CS-273X_B_
1812CS-333X_B_
number
1
Q
60 @ 50 MHz
62 @ 50 MHz
65 @ 50 MHz
68 @ 50 MHz
63 @ 50 MHz
63 @ 50 MHz
65 @ 50 MHz
69 @ 50 MHz
63 @ 50 MHz
59 @ 50 MHz
60 @ 50 MHz
47 @ 50 MHz
36 @ 50 MHz
35 @ 10 MHz
34 @ 10 MHz
30 @ 10 MHz
32 @ 10 MHz
29 @ 10 MHz
20 @ 10 MHz
min
4
1. When ordering, specify
tolerance, termination
and
packaging
codes:
1812CS-333XGBC
G
= 2%
J
= 5%
K
= 10%
(Table shows stock tolerances in bold.)
Termination:
B
= Standard
L
= RoHS compliant Ag/Pd/Pt
Packaging: C
= 7″ machine-ready reel. EIA-481 embossed plastic
tape (600 parts 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 parts per
full reel).
Tolerance:
2. Inductance measured using a Coilcraft SMD-A fixture in an Agilent/HP
4286A impedance analyzer with Coilcraft-provided correlation pieces.
3. Tolerances in bold are stocked for immediate shipment.
4. Q measured using an Agilent/HP 4291A with an Agilent/HP 16193 test
fixture.
5. SRF measured using an Agilent/HP 8753D network analyzer and a
Coilcraft SMD-D test fixture.
6. DCR measured on a Cambridge Technology micro-ohmmeter and a
Coilcraft CCF859 test fixture.
7. Average current for a 15°C rise above 25°C ambient.
8. Operating temperature range
−40°C
to +125°C.
9. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
For part marking data see Color Coding section.
Specifications subject to change without notice.
Document 105-1
Revised 11/13/03
Document 105-2
Chip Inductors – 1812CS Series (4532)
Typical Q vs Frequency
80
Typical L vs Frequency
40
1.8 µH
3.9 µH
33.0 µH
70
60
50
30
Inductance (µH)
Q Factor
8.2 µH
22.0 µH
40
30
20
15.0 µH
15.0 µH
22.0 µH
20
10
33.0 µH
8.2 µH
3.9 µH
1.8 µH
10
0
1
10
100
0
1
10
100
1000
Frequency (MHz)
Frequency (MHz)
B
overall
F
A
G
F
E
terminal
C
I
J
I
D
Terminal wraparound:
approx 0.015/0,38 both ends
H
Recommended
Land Pattern
G
H
3,05
I
1,14
J
3,00
A max B max C max
0.195 0.150 0.135
4,95
3,81
3,43
D ref
0.070
1,78
E
2,54
F
0,64
0.100 0.025 0.128 0.120 0.045 0.118
3,25
Weight:
109 – 128 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 105-2
Revised 11/13/03
Power technology
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