Document M105-1
Chip Inductors – M1812CS Series (4532)
• Higher SRF values than 1812 size parts with ferrite cores
• 5% tolerances for all values
• 19 inductance values from 1.0 to 33 µH
This robust version of Coilcraft’s standard 1812CS series
features a high temperature encapsulant that allows
operation in ambient temperatures up to 155°C and a
leach-resistant base metalization with 63/37 tin-lead ter-
minations that ensures the best possible board adhesion.
SRF min
4
(MHz)
310
230
210
190
170
160
145
130
115
100
90
80
70
60
50
45
40
30
20
DCR max
5
(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
6
(mA)
480
480
430
380
340
300
270
240
230
220
210
200
190
180
170
160
155
150
145
Part
M1812CS-102X_
M1812CS-122X_
M1812CS-152X_
M1812CS-182X_
M1812CS-222X_
M1812CS-272X_
M1812CS-332X_
M1812CS-392X_
M1812CS-472X_
M1812CS-562X_
M1812CS-682X_
M1812CS-822X_
M1812CS-103X_
M1812CS-123X_
M1812CS-153X_
M1812CS-183X_
M1812CS-223X_
M1812CS-273X_
M1812CS-333X_
number
1
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
5
5
5,2
5
5
5
5
5,2
5
5
5
5
5
5
5
5
5,2
5
5,2
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
3
1. When ordering, please specify
tolerance
code:
M1812CS-333XG
Tolerance: G
= 2%
J
= 5%
2. Inductance measured using a Coilcraft SMD-A fixture in an Agilent/HP
4286A impedance analyzer with Coilcraft-provided correlation pieces.
3. Q measured using an Agilent/HP 4291A with an Agilent/HP 16193 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 and a
Coilcraft CCF859 test fixture.
6. Current that causes a 15°C temperature rise from 25°C ambient.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Core material
Ceramic
Terminations
Tin-lead (63/37) over silver-palladium-platinum-glass frit
Ambient temperature
–55°C to +140°C with
Irms
current, +140°C
to +155°C with derated current
Storage temperature
Component: –55°C to +155°C.
Packaging: –55°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)
+100 to +250 ppm/°C
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Enhanced Crush-Resitant Packaging
600 per 7″ reel
Plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing,
3.7 mm pocket depth
®
These parts are preproduction products for electrical evaluation only.
Specification subject to change without notice.
Document M105-1 Revised 02/01/08
Critical Products
© Coilcraft, Inc. 2008
1102 Silver Lake Road
Cary IL 60013
Phone
800-981-0363
Fax
847-639-1508
E-mail
cp@coilcraft.com
Web
www.coilcraft.com/cp
Document M105-2
Chip Inductors – M1812CS 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)
Irms Derating
120
110
100
A
B
overall
F
G
F
E
terminal
C
I
J
I
D
Terminal wraparound:
approx 0.015/0,38 both ends
H
Percent of rated
I
rms
90
80
70
60
50
40
30
20
10
0
-40
-20
0
20
40
60
80
100
120
140 160
25°C
Recommended
Land Pattern
H
3,05
I
1,14
J
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
2,54
F
0,64
G
3,25
0.100 0.025 0.128 0.120 0.045 0.118
Ambient temperature (°C)
®
These parts are preproduction products for electrical evaluation only.
Specification subject to change without notice.
Document M105-2 Revised 02/01/08
Critical Products
© Coilcraft, Inc. 2008
1102 Silver Lake Road
Cary IL 60013
Phone
800-981-0363
Fax
847-639-1508
E-mail
cp@coilcraft.com
Web
www.coilcraft.com/cp
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