 
Midi Spring®
Air Core Inductors
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New RoHS part numbers are shown.
Lead was removed from terminations. The next to the last character is now L to indicate RoHS
compliance. (View old data sheet.)
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- Inductance values from 22 nH to 120 nH
- Exceptionally high Q even at low frequencies
- Handle up to 3.5 Amps current
- Tight tolerance can eliminate circuit tuning (tolerances as
low as 2%)
- Flat top jacket for mechanical stability and reliable pick and
place operations
- Solder coated leads ensure reliable soldering
- RoHS-compliant 260°C compatible. Terminations: tin-silver over
copper
- COTS Plus tin-silver-copper and tin-lead terminations available
- Samples of all values are available in Coilcraft Designer's Kit C318
 Photo 
Pricing  Materials declaration 
PDF data sheet
SPECIFICATIONS
 Q vs
Frequency
L vs Frequency
Current Derating
Color coding
 Dimensions
Tape and reel 
Qualification standards
 S-Parameters
Transmission Line models Modelithics™ substrate scalable models
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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 |
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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 |
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1812SMS-56N_L_ |
56 |
5,2 |
125 |
100 |
150 |
1.5 |
6.2 |
3.0 |
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1812SMS-68N_L_ |
68 |
5,2 |
120 |
100 |
150 |
1.5 |
8.2 |
2.5 |
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1812SMS-82N_L_ |
82 |
5,2 |
120 |
100 |
150 |
1.3 |
9.4 |
2.5 |
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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 |
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| 1 |
When
ordering, please specify tolerance, termination and packaging codes: e.g. 1812SMS-R12JLC |
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Tolerance: |
G = 2%, J = 5%
(Table above shows stock tolerances in bold.) |
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Termination: |
L
= RoHS compliant tin-silver (96.5/3.5) over copper.
Special order, added cost:
T = RoHS tin-silver-copper (95.5/4/0.5) over copper or
S
= non-RoHS tin-lead (63/37) over copper. |
| |
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 and Q tested on an Agilent/HP 4291A with a 16193 fixture and
Coilcraft-supplied correlation pieces. |
| 3 |
Tolerances
in bold are stocked for immediate shipment. |
| 4 |
SRF tested with an Agilent/HP 8753D network analyzer and a Coilcraft
SMD-D test fixture.
Details |
| 5 |
DCR tested on a Cambridge Technology Model 510 Micro-ohmmeter. |
| 6 |
Irms: Current that causes a
15°C temperature rise from 25°C ambient.
Details |
| 7 |
Ambient temperature range: |
–40°C to +125°C with Irms current.
+125°C to +140°C with derated current. Derating curve |
| 8 |
Storage temperature range: |
Component: –40°C to +125°C
Packaging: –55°C to +80°C |
| 9 |
Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between. |
| 10 |
Electrical specifications at 25°C. |
| 11 |
Temperature
coefficient of inductance: +5 to +70 ppm/°C.
Details |
| See
Qualification Standards for complete environmental and
test data. |
| Refer to Soldering Coilcraft Components before soldering. |
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