What this IGBT is and where it fits
The STGB18N40LZT4 is an STMicroelectronics PowerMESH™ IGBT from the automotive-grade AEC-Q101 series, rated for 420 V collector-emitter breakdown and 30 A continuous collector current in a D2PAK surface-mount package. It carries 150 W maximum power dissipation and a 29 nC gate charge, with logic-level input drive. The -55°C to 175°C junction temperature range suits it for under-hood automotive environments—engine control units, transmission solenoids, electric oil pumps—as well as industrial drives and power supplies where the board sees high ambient heat and vibration.
Lifecycle and sourcing reality
The STGB18N40LZT4 is listed as Active in production with ROHS3 compliance. No end-of-life notice or last-time-buy window is in effect. For a BOM line that needs an automotive-qualified IGBT in D2PAK, this part is a current-production choice.
Package and mounting
Surface-mount D2PAK (TO-263-3) with the tab as the collector. The large tab area sinks heat into the PCB copper pour—plan a thermal via array under the tab for the 150 W dissipation.