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.
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
- When ordering, specify tolerance, termination and testing codes: e.g. ST475RATR15GLZ.
- Inductance measured at 150 MHz on an Agilent/HP 4286A or equivalent with a Coilcraft SMD-A test fixture and correlation.
- Q measured at 150 MHz on an Agilent/HP 4291A or equivalent with a 16193A test fixture or equivalent.
- SRF measured on an Agilent/HP 8753ES or equivalent with a Coilcraft CCF1268 test fixture.
- 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.
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.
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
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.