150 V, 2 A Schottky in a DO-15 axial — what the ratings mean
The STPS2150 is a 150 V, 2 A Schottky rectifier from STMicroelectronics in a DO-204AC (DO-15) axial-lead package. The junction is rated to 175 °C maximum, which gives headroom in forced-air or enclosed power supplies where the ambient near the diode runs hot. The 1.5 µA reverse leakage at 150 V is low for a 150 V Schottky — standby loss stays under a milliwatt in lightly loaded converters.
Speed classification and what it tells you
Listed as Fast Recovery ≤ 500 ns at > 200 mA forward current. The 500 ns ceiling is a classification bound, not a performance limit; the part switches faster than a PN recovery diode of the same voltage class.
Package and mounting — DO-15 axial
Through-hole DO-15 (DO-204AC) axial body. The lead form suits point-to-point wiring on terminal strips or PCB through-hole mounting with 0.4-inch lead spacing. The axial body dissipates heat through the leads into the copper pads — keep the pad area generous on both sides to pull junction temperature down from the 175 °C ceiling.