Document 254-1
High L Filter Inductors – 1812FS Series
These shielded chip inductors have been specially de-
signed for high performance in transmit and receive
filters. They feature high inductance, an exceptionally
wide frequency range, low DC resistance and magnetic
shielding to reduce crosstalk.
Only 3,81 mm high, these inductors have a ferrite cover
that provides magnetic shielding and the best possible
surface for pick and place handling.
To request free evaluation samples, contact Coilcraft or
visit
www.coilcraft.com.
Part number
1
1812FS-683_X_
1812FS-154_X_
1812FS-224_X_
1812FS-274_X_
1812FS-334_X_
1812FS-394_X_
1812FS-474_X_
1812FS-564_X_
1812FS-684_X_
1812FS-824_X_
L
Percent Q
(µH)
tol
min
68
10,5
45
150
10,5
40
220
10,5
45
270
10,5
35
330
10,5
45
390
470
560
680
820
10,5
10,5
10,5
10,5
10,5
10,5
45
35
20
25
25
30
2
3
4
DCR
5
SRF
6
max
typ
(Ohms) (MHz)
1.8
22.0
3.8
3.4
5.4
3.0
6.5
2.0
6.8
3.0
7.6
8.7
11.2
12.7
16.8
19.5
2.6
2.10
1.60
1.90
1.45
1.68
1. When ordering, please specify
tolerance
and
packaging
codes:
Isat
7
Irms
8
(mA) (mA)
300 650
210 475
160 390
120 350
140 310
120
110
100
100
90
90
310
280
280
250
210
160
1812FS-105_X_ 1000
1812FS-105JXC
Tolerance: J
= 5%
K
= 10%
(Table shows stock tolerances in bold.)
Packaging: C
= 7″ machine-ready reel. EIA-481 embossed plastic
tape (600 parts per full reel).
B
= Less than full reel. On tape, but not machine ready.
To have a leader and a trailer added ($25 charge),
use code letter C instead.
D
= 13″ machine-ready reel. EIA-481 embossed plastic
tape (2200 parts per full reel).
2. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using a Coilcraft
SMD-A fixture in an Agilent/HP 4263B impedance analyzer.
3. Tolerances in bold are stocked for immediate shipment.
4. Q measured at 1 MHz on an Agilent/HP 4291A with an Agilent/
HP 16193 test fixture.
5. DCR measured on a micro-ohmmeter and a Coilcraft CCF840 test
fixture.
6. SRF measured using an Agilent/HP 8753D network analyzer and a
Coilcraft SMD-D test fixture.
7. DC current at which the inductance drops 10% (typ) from its value
without current.
8. Average current for a 40°C rise above 25°C ambient.
9. Operating temperature range -40°C to +85°C.
10. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
Specifications subject to change without notice.
Please check our website for latest information. Document 254-1
Revised 04/13/05
© Coilcraft, Inc. 2005
Document 254-2
High L Filter Inductors – 1812FS Series
Typical L vs Frequency
10000
Typical L vs Current
10000
1000 µH
Inductance (µH)
1000
Inductance (µH)
390 µH
1000
1000 µH
390 µH
100
68 µH
100
68 µH
10
0.1
1
10
10
10
100
1000
Frequency (MHz)
Current (mA)
B
overall
C
0.045
1,14
0.120
3,05
A F
0.118
3,00
G
E
terminal
D
Recommended
Land Pattern
E ref
0.100
2,54
F ref
0.178
4,52
G
0.025
0,64
A max
0.231
5,87
B max
0.196
4,98
C max
0.150
3,81
D ref
0.107
2,72
Terminations:
Silver-palladium-platinum
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.
Please check our website for latest information. Document 254-2
Revised 12/14/04
© Coilcraft, Inc. 2005
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