Datasheet
3D Models
ST426RAT, ST446RAT
Air Core Inductors for Critical Applications
ST426RAT, ST446RAT Series feature high Q over a wide range of frequencies.
- Only 2 mm tall.
- Low DCR and excellent current handling capability.
- Tin-silver over copper terminations. Other terminations available at additional cost.
Specifications
Electrical specifications at 25°C.
ST426RAT Series
| Part number 1 | Turns | Inductance (nH) 2 | Tolerance (%) |
Q min
@ 250 MHz 3 |
SRF min (GHz) 4 | DCR max (mΩ) 5 | Imax (A) |
|---|---|---|---|---|---|---|---|
| ST426RAT5N5_LZ | 3 | 5.5 | 5,2 | 115 | 5.0 | 2.6 | 4.0 |
| ST426RAT9N0_LZ | 4 | 9.0 | 5,2 | 120 | 4.0 | 3.4 | 4.0 |
| ST426RAT13N_LZ | 5 | 13 | 5,2 | 100 | 3.0 | 3.9 | 4.0 |
ST446RAT Series
| Part number 1 | Turns | Inductance (nH) 2 | Tolerance (%) |
Q min
@ 250 MHz 3 |
SRF min (GHz) 4 | DCR max (mΩ) 5 | Imax (A) |
|---|---|---|---|---|---|---|---|
| ST446RAT16N_LZ | 7 | 16 | 5,2 | 110 | 3.0 | 5.2 | 4.0 |
| ST446RAT18N_LZ | 8 | 18 | 5,2 | 110 | 2.9 | 6.0 | 4.0 |
| ST446RAT23N_LZ | 9 | 23 | 5,2 | 110 | 2.6 | 6.8 | 4.0 |
| ST446RAT27N_LZ | 10 | 27 | 5,2 | 110 | 2.3 | 7.9 | 4.0 |
Notes
- When ordering, specify tolerance, terminations and testing codes: e.g. ST446RAT27NGLZ.
- Inductance measured at 250 MHz on an Agilent/HP 4286A or equivalent with a Coilcraft SMD-A test fixture and correlation.
- Q measured at 250 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: –40°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:
60 – 169 mg
Packaging:
1000 per 7″reel Plastic tape: 2 mm wide, 0.23 mm thick, 8 mm pocket spacing, 2.2 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.