400 V NPN in DPAK — offline flyback workhorse
The STMicroelectronics STD13003T4 is an NPN bipolar power transistor rated for 400 V collector-emitter breakdown and 1.5 A continuous collector current, housed in a DPAK (TO-252) surface-mount package.
Vce(sat) and conduction loss — what 3 V at 1.5 A means
The saturation voltage is 3 V maximum at 1.5 A collector current with 500 mA base drive.
DC current gain — hFE floor at 1 A
Minimum DC current gain is 5 at 1 A collector current with 2 V Vce.
DPAK footprint and reflow considerations
The DPAK (TO-252) package has three leads plus a large tab.
STMicroelectronics lists the STD13003T4 as an active product with ROHS3 compliance.