US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Midi Spring® Air Core Inductors
Document 184-1
Document 184-1 Revised 02/19/13
Inductance2 Percent
Q4 Test freq.
SRF min5
DCR max6
Irms7
Part number1 (nH)
tolerance3 typ min (MHz) (GHz) (mOhm) (A)
1812SMS-22N_L_ 22 5,2 135 100 150 3.2 4.2 3.0
1812SMS-27N_L_ 27 5,2 135 100 150 2.7 4.0 3.5
1812SMS-33N_L_ 33 5,2 130 100 150 2.5 4.8 3.0
1812SMS-39N_L_ 39 5,2 135 100 150 2.1 4.4 3.0
1812SMS-47N_L_ 47 5,2 135 100 150 2.1 5.6 3.0
1812SMS-56N_L_ 56 5,2 125 100 150 1.5 6.2 3.0
1812SMS-68N_L_ 68 5,2 120 100 150 1.5 8.2 2.5
1812SMS-82N_L_ 82 5,2 120 100 150 1.3 9.4 2.5
1812SMS-R10_L_ 100 5,2 115 100 150 1.2 12.3 1.7
1812SMS-R12_L_ 120 5,2 125 100 150 1.1 17.3 1.5
1812SMS-R15_L_ 150 5,2 145 100 150 0.75 33.0 1.2
1. When ordering, specify tolerance, termination and packaging codes:
1812SMS-R12GLC
Tolerance: G = 2% J = 5%
Termination: L = RoHS compliant tin-silver (96.5/3.5) over copper.
Special order: T = RoHS tin-silver-copper
(95.5/4/0.5) or S = non-RoHS tin-lead (63/37).
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape, 500 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, 2000 parts per
full reel.
2. Inductance tested at 150 MHz on an Agilent/HP 4286A LCR meter or
equivalent with a Coilcraft SMD-A test fixture and correlation.
3. Tolerances in bold are stocked for immediate shipment.
4. Q tested at 150 MHz on an Agilent/HP 4291A Impedance Analyzer with
an Agilent/HP 16193 test fixture or equivalents.
5. SRF tested on the Agilent/HP 8753D Network Analyzer or equivalent
and a Coilcraft CCF1248 test fixture.
6. DCR tested on the Cambridge Technology Model 510 Micro-ohmmeter
or equivalent.
7. Current that causes a 15°C temperature rise from 25°C ambient.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
For part marking data see www.coilcraft.com/colrcode.cfm.
Weight 0.10 – 0.16 g
Terminations RoHS compliant tin-silver over copper. Other
terminations available at additional cost.
Ambient temperature –40°C to +125°C with Irms current, +125°C
to +140°C with derated current
Storage temperature Component: –40°C to +140°C.
Tape and reel 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) +5 to +70 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 500/7″ reel; 2000/13″ reel Plastic tape: 12 mm wide,
0.3 mm thick, 8 mm pocket spacing, 4.33 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other
solvents, see Doc787_PCB_Washing.pdf
• AircoreinductorsfeaturehighQandcurrenthandling
• Acrylictopprovidesaatsurfaceforpickandplace
• Soldercoatedleadsensurereliablesoldering
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 184-2
Document 184-2 Revised 02/19/13
Midi Spring® Air Core Inductors
Typical L vs Frequency Typical Q vs Frequency
0
110
Frequency (MHz)
Inductance (nH)
100 1000 10000
22 nH
39 nH
68 nH
120 nH
250
200
150
100
50
110
Frequency (MHz)
Q factor
100 1000 10000
22 nH
39 nH
68 nH
120 nH
0
250
200
150
100
50
Irms Derating
-40 -20 020406080100 140120
Ambient temperature (°C)
120
110
100
90
80
70
60
50
40
30
20
10
0
Percent of rated rmsI
25°C
Dimensions are in inches
mm
Designer’s Kit C318 contains 12 each of all 5% values.
Designer’s Kit C318-2 contains12 each of all 2% values.
