150 V, 3 A Schottky in a DO-201AD axial package
The STPS3150RL is a 150 V, 3 A Schottky rectifier from STMicroelectronics in the DO-201AD axial-lead package. It is designed for low-voltage, high-frequency rectification in switch-mode power supplies, freewheeling diodes, and polarity protection circuits where the Schottky's low forward voltage drop and fast switching reduce losses.
820 mV forward drop at rated current
Forward voltage is specified at 820 mV maximum at 3 A forward current. For a 3 A load, this sets the conduction loss floor at roughly 2.5 W — the DO-201AD package's thermal impedance to ambient must be factored into the heatsinking or PCB copper area to keep the junction below the 175 °C maximum. Reverse leakage is 2 µA at 150 V reverse voltage, typical for a 150 V Schottky. Leakage rises with junction temperature, so the thermal design should account for the leakage contribution at the operating temperature.
It is ROHS3 compliant, with no exemptions that would complicate EU or global regulatory acceptance.