Datasheet 3D Model
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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
ST312RAP561JRZ 560 12 330 1.35 300 Brown
  1. When ordering, please specify termination and testing codes: e.g. ST312RAP332JRZ.
  2. 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.
  3. Q measured using an Agilent/HP 16197A fixture in Agilent/HP 4291 impedance analyzer or equivalents.
  4. SRF measured using Agilent/HP 8753D network analyzer or equivalent with a Coilcraft CCF1232 test fixture.
  5. DCR measured on a Keithley 580 micro-ohmmeter or equivalent and a Coilcraft CCF1010 test fixture.
  6. 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.


  • 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)


  • Z = Unscreened
  • H = Group A screening per Coilcraft CP-SA-10001
All screening performed to the document’s latest revision.
Custom screening also available.
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.
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

Physical characteristics


General specification

Core Material:
3.2 – 4.4 mg
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.


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.