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STMicroelectronics STPS30SM120STN — Discrete Semiconductors

STPS30SM120STN Schottky Rectifier 30A 120V TO-220AB

MPNSTPS30SM120STN
Obsolete

STMicroelectronics STPS30SM120STN, Schottky rectifier, 120 V, 30 A, Fast Recovery ≤ 500 ns, TO-220-3 (TO-220AB narrow leads), tube.

$1.9700Ref. price · indicative, final on quote
STMicroelectronics STPS30SM120STN datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS30SM120STN specifications
ParameterValue
MountingThrough Hole
Voltage - DC reverse (Vr)120 V
Voltage - forward (Vf) (Max) @ if950 mV @ 30 A
Current - reverse leakage @ vr275 µA @ 120 V
Current - average rectified30A
Operating temperature - junction150°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologySchottky
CaseTO-220-3

Product details

30 A, 120 V Schottky — output rectifier for power supplies

The STPS30SM120STN is a 30 A, 120 V Schottky rectifier from STMicroelectronics, housed in a TO-220AB narrow-lead through-hole package. It is designed for high-current output rectification in switch-mode power supplies, freewheeling diodes in DC-DC converters, and reverse-polarity protection circuits where low forward voltage drop and fast switching are required.

Forward drop and thermal budget at 30 A

The forward voltage is specified at 950 mV maximum at 30 A — this is the conduction loss that sets the heatsink requirement. Reverse leakage is 275 µA at 120 V rated reverse voltage — typical for a high-voltage Schottky at elevated temperature. Leakage doubles with every 10 °C rise above 25 °C, so the thermal design should account for the leakage contribution to the total power dissipation at high junction temperatures.

STMicroelectronics lists the STPS30SM120STN as obsolete.

Frequently asked questions

What is the replacement for STPS30SM120STN?

STMicroelectronics has not published an official successor or cross-reference for the STPS30SM120STN. A pin-compatible alternative in the same TO-220AB footprint would need to match the 30 A, 120 V rating and the narrow-lead variant — confirm the lead form and thermal pad dimensions before substituting.