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1111SQ Series

Square Air Core Inductors

RoHS compliant halogen free
Coilcraft 1111SQ Series square air core inductors have extremely high Q factors and very tight inductance tolerances, making them suitable for narrowband RF amplifier matching and tuning applications. As their name implies, air-core inductors do not use a magnetic core, resulting in high Q and the lowest possible losses for high-frequency applications. High-reliability versions are available for space, military, and other critical applications.
  • Exceptionally high Q – up to 200 at 400 MHz
  • Inductance values from 27 to 47 nH
  • Flat top and bottom for reliable pick and place and mechanical stability
  • Solder coated leads ensure excellent solderability
  • For lower inductance values, consider the 0806SQ, 0807SQ and 0908SQ
  • For higher inductance values, consider the 1515SQ, 2222SQ and 2929SQ
Buy Now:
Count Unit price
1 $1.21
300 $0.91
600 $0.74
1200 $0.59
2400 $0.42
5000 $0.31
10000 $0.29

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:

Designer's Kit:
Kit Values Price
C457 7 (10 of each) $45.00

Specifications

Electrical specifications at 25°C.

Part number 1 Inductance (nH) 2 Tolerance (%) 3 Q typ
@ 400 MHz 4
SRF min (GHz) 5 DCR (mΩ) 6 Irms (A) 7
typ max
1111SQ-27N_E_ 27 2,5 200 2.6 7.0 8.1 5.5
1111SQ-30N_E_ 30 2,5 200 2.4 7.2 8.3 5.5
1111SQ-33N_E_ 33 2,5 200 2.3 8.3 9.5 4.8
1111SQ-36N_E_ 36 2,5 200 2.3 8.5 9.8 4.8
1111SQ-39N_E_ 39 2,5 200 2.2 8.7 10.0 4.8
1111SQ-43N_E_ 43 2,5 200 2.2 9.4 10.8 4.4
1111SQ-47N_E_ 47 2,5 200 2.2 9.8 11.3 4.4
Notes
  1. When ordering, please specify tolerancetermination and packaging codes: e.g. 2929SQ-501JEC
  2. Inductance measured at specified test frequency, 0.1 Vrms, 0 A using an Agilent/HP 4286A LCR meter with a Coilcraft CCF1191C test fixture.
  3. Tolerances in bold are stocked for immediate shipment
  4. Q measured at specified test frequency, using an Agilent/HP 4291A impedance analyzer.
  5. SRF measured using an Agilent/HP 8753 network analyzer and a Coilcraft CCF1248 test fixture.
  6. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  7. Irms: Current that causes a 20°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.

Tolerance:

  • = 2%, = 5% (Table shows stock tolerances in bold.)

Termination:

  • E = RoHS compliant tin-silver (96.5/3.5) over copper.
  • T = RoHS tin-silver-copper (95.5/4/0.5) over copper. (Special order, added cost) 
  • S = non-RoHS tin-lead (63/37) over copper. (Special order, added cost) 

Packaging:

  • C = 7″ machine-ready reel.
    EIA-481 embossed plastic tape  (600 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 (2500 parts per full reel). Factory order only, not stocked.
Environmental
Environmental:
RoHS compliant , halogen free
Ambient temperature range:
−40°C to +125°C with Irms current
Storage temperature range:
Component: −40°C to +145°C
Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+145°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
One per billion hours / one billion hours, calculated per Telcordia SR-332

Performance curves

L vs Frequency

Q vs Frequency

Physical characteristics

1111sqd.gif
 
Part number A B C D E F  
1111SQ-27N
1111SQ-30N
0.105±0.010 0.105 ±0.015 0.110 ±0.005 0.090 0.120 0.0>40 inches
2,67 ±0,254 2,67 ±0,381 2,79 ±0,127 2.29 3,05 1,02 mm
1111SQ-33N
1111SQ-36N
1111SQ-39N
0.115±0.010 0.105 ±0.015 0.110 ±0.005 0.100 0.120 0.0>40 inches
2,92 ±0,254 2,67 ±0,381 2,79 ±0,127 2.54 3,05 1,02 mm
1111SQ-43N
1111SQ-47N
0.130 ±0.010 0.105 ±0.015 0.110 ±0.005 0.110 0.120 0.040 inches
3,30 ±0,254 2,67 ±0,381 2,79 ±0,127 2.79 3,05 1,02 mm

Tape and Reel specification

tapereel_pl.gif
 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
7" (178 mm) 13" (330 mm) A B C D E W P Po P1 H T part_or_ah.gif
600 2500* 178/330 60/100 13 18,4 12,4 12 8 4 2 3,05 0,35
*Special order
 

General specification

Weight:
34 - 50 mg
Packaging:
600/7″ reel; 2500/13″ reel; Plastic tape: 12 mm wide, 0.35 mm thick, 8 mm pocket spacing, 3.05 mm pocket depth
Temperature coefficient of inductance:
+5 to +70 ppm/°C

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
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.
Refer to Soldering Coilcraft Components before soldering.
Recommended Pick & Place Nozzle:
OD: 0.054 inch; ID: 0.031 inch
PCB Washing:
Tested with pure water or alcohol only. Other solvents.

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