Datasheet
3D Model
Specifications
Electrical specifications at 25°C.
| Part number 1 | Inductance (nH) 2 | Tolerance (%) | 900 MHz | 1.7 GHz | Q min 3 | SRF min (MHz) 4 | DCR max (Ω) 5 | Imax (mA) | Color code | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| L typ | Q typ 3 | L typ | Q typ 3 | ||||||||
| ST312RAA27N_RZ | 27 | 5,2,1 | 29.2 | 74 | 34.6 | 65 | 32 | 2380 | 0.220 | 530 | Gray |
Notes
- When ordering, specify tolerance, termination and screening codes: e.g. ST312RAAR39JRZ.
- Inductance measured using a Coilcraft SMD-A test fixture and Coilcraft-provided correlation pieces with an Agilent/HP 4286A impedance analyzer or equivalent.
- Q measured at the same frequency as inductance using an Agilent/HP 4291A with an Agilent/HP 16197A test fixture or equivalents.
- SRF measured using an Agilent/HP 8753ES network analyzer and a Coilcraft CCF1232 test fixture.
- DCR measured on a Keithley 580 micro-ohmmeter and a Coilcraft CCF1010 test fixture.
Tolerance:
- F = 1%
- G = 2%
- J = 5%
Termination:
- R = Tin over nickel over silver-platinum-glass frit.
- A = Gold over nickel over moly-mag
- L = Silver-palladium-platinum glass frit.
- P = Tin-lead (63/37) over 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.
- C = Tin-lead (63/37) over gold over nickel over moly-mag
- F = Tin-silver-copper (95.5/4/0.5) over gold over nickel over moly-mag
- S = Tin-lead (63/37) over silver-platinum-glass frit.
- T = Tin-silver-copper (95.5/4/0.5) over silver-platinum-glass frit.
Screening:
- Z = Unscreened
- H = Group A screening per Coilcraft CP-SA-10001
- Screening performed to the document’s latest revision.
- Custom testing also available.
- Country of origin restrictions available; prefix options G or F.
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
Core Material:
Ceramic
Packaging:
2000 per 7′′ reel Paper tape: 8 mm wide, 1.0 mm thick, 4 mm pocket spacing.
Temperature coefficient of inductance:
+25 to +155 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.