150 V, 1 A Schottky — obsolete but still in the channel
The STMicroelectronics STPS1150M is a 150 V, 1 A Schottky rectifier in the DO-216AA STmite surface-mount package. It carries a fast-recovery characteristic (≤ 500 ns, > 200 mA) typical of Schottky technology, with a forward voltage drop of 820 mV at the rated 1 A forward current.
For a BOM that requires this exact diode, procurement must turn to independent distribution — surplus, new-old-stock reels.
820 mV Vf at 1 A — thermal budget check
At 1 A forward current the STPS1150M exhibits 820 mV typical forward drop. That translates to roughly 820 mW of dissipation — manageable in the STmite package if the board has adequate copper spreading, but tight for a compact design without airflow. The 175°C junction rating provides headroom, but the thermal resistance of the DO-216AA means the trace-connected cathode tab is the primary heat path.
