60 V, 3 A NPN in a DPAK — what it handles
The STMicroelectronics STD1802T4 is an NPN bipolar transistor rated for 60 V collector-emitter breakdown and 3 A continuous collector current, housed in a DPAK (TO-252-3) surface-mount package. With a transition frequency of 150 MHz, it is built for medium-speed switching and linear regulation in power supplies, motor pre-drive stages, and DC-DC converter circuits. The 15 W maximum power dissipation is specified for the DPAK footprint on a standard PCB — derate for elevated ambient temperature and limited copper area.
Vce(sat) and hFE — switching efficiency
Saturation voltage is 400 mV maximum at 150 mA base drive and 3 A collector current. DC current gain minimum is 200 at 100 mA, 2 Vce.
DPAK package — board fit and thermal path
The DPAK (TO-252-3) is a common surface-mount power package with a metal tab that carries the collector. The tab is electrically live — account for creepage and clearance if heatsinking to a grounded plane.
No last-time-buy or end-of-life notices are documented.