Seven Darlington channels in an automotive-rated SOIC-16
The STMicroelectronics ULQ2003D1013TRY packs seven NPN Darlington pairs into a 16-SOIC package, each rated for 500 mA collector current and a 50 V collector-emitter breakdown. This is the automotive-grade variant, qualified to AEC-Q100, and rated for junction temperatures up to 150 °C — suitable for under-hood or engine-bay environments where the commercial ULN2003 family would exceed its thermal budget. The saturation voltage is 1.6 V maximum at 500 µA base drive and 350 mA collector current, leaving enough headroom for a 12 V or 24 V automotive supply rail to deliver a clean logic-level output.
What the 50 V / 500 mA rating means for the BOM
The 500 mA per-channel limit is a per-output ceiling, not a package total — the SOIC-16's thermal resistance means you derate if driving several channels at the full 500 mA simultaneously. For a typical relay or small solenoid the 350 mA test point is the practical continuous load.