Close up of ST475RAT
Datasheet 3D Models

ST475RAT Series

Air Core Inductors for Critical Applications

ST475RAT Series offers high Q over a wide range of frequencies.
  • Excellent current handling.
  • Acrylic top provides a flat surface for pick and place.
  • Solder coated leads ensure reliable soldering.
  • Tin-silver over copper terminations. Other terminations available at additional cost.

Looking for the commercial version of this part? See Coilcraft 1812SMS (Midi) Series
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Specifications

Electrical specifications at 25°C.

Part number 1 Inductance (nH) 2 Tolerance (%) Q @ 150 MHz 3 SRF min (GHz) 4 DCR max (mΩ) 5 Imax (A)
min typ
ST475RAT22N_LZ 22 5,2 100 135 3.2 4.2 3.0
ST475RAT27N_LZ 27 5,2 100 135 2.7 4.0 3.5
ST475RAT33N_LZ 33 5,2 100 130 2.5 4.8 3.0
ST475RAT39N_LZ 39 5,2 100 135 1.8 4.4 3.0
ST475RAT47N_LZ 47 5,2 100 135 2.1 5.6 3.0
ST475RAT56N_LZ 56 5,2 100 125 1.5 6.2 3.0
ST475RAT68N_LZ 68 5,2 100 120 1.5 8.2 2.5
ST475RAT82N_LZ 82 5,2 100 120 1.3 9.4 2.5
ST475RATR10_LZ 100 5,2 100 115 1.2 12.3 1.7
ST475RATR12_LZ 120 5,2 100 125 1.1 17.3 1.5
ST475RATR15_LZ 150 5,2 100 145 0.75 33.0 1.2
Notes
  1. When ordering, specify tolerance, termination and testing codes: e.g. ST475RATR15GLZ.
  2. Inductance measured at 150 MHz on an Agilent/HP 4286A or equivalent with a Coilcraft SMD-A test fixture and correlation.
  3. Q measured at 150 MHz on an Agilent/HP 4291A or equivalent with a 16193A test fixture or equivalent.
  4. SRF measured on an Agilent/HP 8753ES or equivalent with a Coilcraft CCF1268 test fixture.
  5. DCR measured on a Keithley 580 Micro-Ohmmeter or equivalent.

Tolerance:

  • G = 2%
  • J = 5%

Termination:

  • L = Tin-silver over copper.
  • T = Tin-silver-copper (95.5/4/0.5) over copper. (Special order, added cost)
  • S = Tin-lead (63/37) over copper. (Special order, added cost)

Testing:

  • Z = Unscreened
  • H = Group A screening per Coilcraft CP-SA-10001.
All screening performed to the document’s latest revision.
Custom screening also available.
Environmental
Ambient temperature range:
–40°C to +125°C with Imax current.
Storage temperature range:
Component: –55°C to +140°C.
Tape and reel packaging: –55°C to +80°C.
Maximum part temperature:
+140°C (ambient + temp rise).
Failures in Time (FIT) / Mean Time Between Failures (MTBF):

Performance curves

Typical L vs Frequency

Typical Q vs Frequency

Physical characteristics

EDIM.PNG

General specification

Weight:
80 – 200 mg
Packaging:
500 per 7″reel Plastic tape: 12 mm wide, 0.3 mm thick, 8 mm pocket spacing, 4.2 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:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles.
Refer to Soldering Coilcraft Components before soldering.