STMicroelectronics STPS2150

Overview

STPS2150 from STMicroelectronics is a 150 V, 2 A average forward current power Schottky rectifier in SMA, SMA Flat Notch, and DO-15 packages. It delivers low forward voltage drop (0.62 V typ. at 125 °C, 2 A), negligible switching losses, and avalanche capability for robustness in high-frequency DC/DC converters and telecom power supplies.

For engineers reviewing the STPS2150 datasheet, STPS2150 pinout, STPS2150 application, or STPS2150 equivalent, key selection criteria include thermal resistance (20 °C/W junction-to-lead), peak reverse voltage (150 V), surge current rating (75 A), and ECOPACK2 compliance for environmental design requirements.

Technical Context

The STPS2150 is a unidirectional Schottky barrier diode optimized for high-efficiency, high-frequency rectification in switch-mode power supplies. Its low VF minimizes conduction loss, while its 175 °C maximum junction temperature and 20 °C/W R_th(j-L) support thermally constrained layouts without forced cooling.

It features specified avalanche capability (170 W peak, 10 µs pulse) and low reverse leakage (1.5 µA at 25 °C, 150 V), enabling reliable operation in transient-prone telecom and consumer power rails up to 24 V.

Key Specifications

Pinout & Package

STPS2150 is offered in three discrete package variants: SMA (surface-mount), SMA Flat Notch (surface-mount with cathode band), and DO-15 (axial lead). All are two-terminal devices: anode and cathode. The SMA and SMA Flat Notch packages share identical pinout geometry - cathode marked by band or notch; DO-15 uses axial leads with cathode identified by band.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with SS215H and MBR2150CT, the STPS2150 uniquely balances 2 A continuous rating, ultra-low VF, surface-mount compatibility, and avalanche ruggedness-making it optimal for space- and efficiency-constrained 24 V-class SMPS where single-diode simplicity is preferred.

Availability

STPS2150 is available at Aetrix Electronics and suitable for telecom power supplies, USB-C PD adapters, and laptop AC/DC converters requiring stable component supply across long production cycles and evolving regulatory landscapes.

Supply support for STPS2150 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS2150 belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in compact, thermally demanding applications such as consumer adapters and telecom infrastructure.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STPS2150 has a maximum junction temperature of +175 °C, verified per absolute ratings in DS3282 Rev 8. Continuous operation at this limit requires thermal design ensuring R_th(j-a) ≤ 50 °C/W under worst-case ambient and power dissipation conditions, typically achieved using ≥2 cm² of 35 µm copper per lead on FR4 PCB.

Does STPS2150 require a heatsink in standard SMA mounting?

No heatsink is required for STPS2150 in SMA package at I_F(AV) = 2 A, provided PCB copper area under each lead is ≥1 cm² and ambient temperature remains ≤70 °C. Its 20 °C/W R_th(j-L) enables sufficient conduction cooling via standard FR4 pads without additional thermal hardware.

How does the avalanche rating impact system-level reliability?

The STPS2150's 170 W peak avalanche power rating (10 µs pulse, T_j = 125 °C) provides validated energy-handling capability against inductive voltage spikes in flyback and boost converters. This eliminates need for external snubbers in many 24 V-class designs, reducing BOM count and improving long-term field reliability.

Is STPS2150 compatible with lead-free reflow profiles?

Yes - STPS2150 in SMA and SMA Flat Notch packages is qualified for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260 °C. The epoxy meets UL 94 V0 and ECOPACK2 requirements, including halogen-free composition and RoHS compliance, supporting full Pb-free manufacturing.