Datasheet
3D Model
ST312RAP Series
Chip Inductors for Critical Applications
ST312RAP Series offers higher inductance values than other 0603 ceramic chip inductors.
- 14 inductance values from 330 nH – 3.3 μH.
- Matte tin over nickel over silver-platinum-glass frit terminations. Other terminations available at an additional cost.
Specifications
Electrical specifications at 25°C.
| Part number 1 |
Inductance (nH)
2
(Tolerance: ± 5%) |
Q typ
@ 25 MHz 3 |
SRF typ (MHz) 4 | DCR max (Ω) 5 | Irms (mA) 6 | Color code |
|---|---|---|---|---|---|---|
| ST312RAP331JRZ | 330 | 13 | 420 | 0.97 | 330 | Violet |
| ST312RAP391JRZ | 390 | 13 | 400 | 1.05 | 330 | Gray |
| ST312RAP471JRZ | 470 | 12 | 200 | 1.15 | 300 | White |
| ST312RAP511JRZ | 510 | 12 | 340 | 1.20 | 300 | Black |
| ST312RAP561JRZ | 560 | 12 | 330 | 1.35 | 300 | Brown |
| ST312RAP681JRZ | 680 | 12 | 310 | 1.80 | 260 | Red |
| ST312RAP821JRZ | 820 | 14 | 290 | 2.45 | 190 | Orange |
| ST312RAP102JRZ | 1000 | 14 | 250 | 2.80 | 190 | Yellow |
| ST312RAP122JRZ | 1200 | 14 | 230 | 3.20 | 180 | Green |
| ST312RAP152JRZ | 1500 | 15 | 190 | 4.10 | 150 | Blue |
| ST312RAP182JRZ | 1800 | 16 | 180 | 5.30 | 140 | Violet |
| ST312RAP222JRZ | 2200 | 16 | 165 | 5.90 | 130 | Gray |
| ST312RAP272JRZ | 2700 | 16 | 150 | 7.00 | 120 | White |
| ST312RAP332JRZ | 3300 | 18 | 135 | 9.10 | 110 | Black |
Notes
- When ordering, please specify termination and testing codes: e.g. ST312RAP332JRZ.
- Inductance measured at 25 MHz and 0.1 Vrms, using a Coilcraft SMD-A fixture in Agilent/HP 4287A impedance analyzer or equivalent with Coilcraft-provided correlation pieces.
- Q measured using an Agilent/HP 16197A fixture in Agilent/HP 4291 impedance analyzer or equivalents.
- SRF measured using Agilent/HP 8753D network analyzer or equivalent with a Coilcraft CCF1232 test fixture.
- DCR measured on a Keithley 580 micro-ohmmeter or equivalent and a Coilcraft CCF1010 test fixture.
- 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.
Termination:
- R = Matte tin over nickel over silver-platinum-glass frit.
- Q = Tin-silver-copper (95.5/4/0.5) over tin over nickel over silver-platinum-glass frit. (Special order, added cost)
- P = Tin-lead (63/37) over tin over nickel over silver-platinum-glass frit. (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 Irms current.
Storage temperature range:
Component: –55°C to +140°C.
Tape & reel packaging: –55°C to +80°C.
Tape & 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
Typical Impedance vs Frequency
General specification
Core Material:
Ceramic
Weight:
3.2 – 4.4 mg
Packaging:
2000 per 7′′ reel. Plastic tape: 8 mm wide, 0.23 mm thick, 4 mm pocket spacing, 1.0 mm pocket depth.
Temperature coefficient of inductance:
+50 to +150 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.