ST440RFU Series
Wideband Transformers for Critical Applications
ST440RFU Series offers 250 mA max current rating.
- 3 dB bandwidth: 1 MHz to 8.5 GHz
- 1/4 Watt RF input power
- 250 mA max current rating
Specifications
Electrical specifications at 25°C. Measurements are referenced to 50 Ohms.
|
Part number
1
(Hover for schematics)
|
L min per winding (µH) 2 | DCR max (Ω) 3 |
Imp. ratio pri:sec |
Current rating (mA) |
Insertion loss (db) |
Bandwidth (MHz) |
|---|---|---|---|---|---|---|
| ST440RFU01A1LZ | 3.6 | 45.0 | 1 : 1 | 250 | 1.5 | 1 — 8500 |
| ST440RFU02A1LZ | 7.5 | 71.0 | 1 : 2 | 250 | 1.5 | 0.5 — 5000 |
| ST440RFU04B1LZ | 7.5 | 71.0 | 1 : 4 | 250 | 1.3 | 0.5 — 4500 |
Notes
- When ordering, please specify termination and screening codes: e.g. ST440FRU04B1LZ.
- Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/HP 4192 or equivalent.
- DCR measured on a micro-ohmmeter.
Termination:
- L = Tin-silver-copper (95.5/4/0.5) over leach-resistant silver-platinum-glass frit.
- S = Tin-lead (63/37) over leach-resistant silver-platinum-glass frit.
Screening:
- Z = Unscreened
- H = Coilcraft CP-SA-10001 Group A
- Screening performed to the document’s latest revision.
- Lot qualification (Group B) available.
- Custom testing also available.
Environmental
Ambient temperature range:
–40°C to +125°C
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
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
Performance curves
Schematics
General specification
Core Material:
Ferrite
Weight:
85 – 105 mg
Packaging:
750/7″ reel; 2500/13″ reel; Plastic tape: 12 mm wide, 0.4 mm thick, 8 mm pocket spacing, 3.05 mm pocket depth
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.