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Midi Spring®
Air Core Inductors

  • Inductance values from 22 nH to 120 nH
  • Exceptionally high Q even at low frequencies; Handles up to 3.5 Amps current
  • Tight tolerance can eliminate circuit tuning (tolerances as low as 2%)
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • 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

SPECIFICATIONS


Part number1
Click for samples
Inductance2
(nH)
Percent
tolerance3
Q4 Test freq
(MHz)
SRF min5
(GHz)
DCR max6
(mOhm)
Irms7
(A)
typ min
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, please specify tolerance, termination and packaging codes: e.g. 1812SMS-R12JLC
Tolerance: G = 2%, J = 5% (Table above shows stock tolerances in bold.)
  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 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. Details
6 DCR tested at 25°C on a Cambridge Technology Model 510 Micro-ohmmeter or equivalent. For other operating temperatures, use this DCR at Temperature calculator.
7 Irms: Current that causes a 15°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.
8 Ambient temperature range: −40°C to +125°C with Irms current.
9 Storage temperature range: Component: −40°C to +140°C
Tape and reel packaging: −40°C to +80°C
10 Maximum part temperature: +140°C (Ambient + temperature rise)
11 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.
12 Electrical specifications at 25°C.
13 Temperature coefficient of inductance: +5 to +70 ppm/°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info..

22 nH spring, 27 nH spring, 33 nH spring, 39 nH spring, 47 nH spring, 56 nH spring, 68 nH spring, 82 nH spring, 100 nH spring, 120 nH spring
22 nH spring, 27 nH spring, 33 nH spring, 39 nH spring, 47 nH spring, 56 nH spring, 68 nH spring, 82 nH spring, 100 nH spring, 120 nH spring
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Updated: September 21, 2015