STMicroelectronics STPS2H100AFN

Overview

STPS2H100AFN from STMicroelectronics is a 100 V, 2 A Schottky rectifier in SMA Flat Notch package, designed for high-frequency DC/DC converters and telecom power supplies. It delivers low forward voltage drop (0.65 V max at 2 A, 125 °C), negligible switching losses, avalanche capability (173 W peak), and operates up to 175 °C junction temperature - enabling compact, thermally robust power stages in LED lighting and battery charger designs.

For engineers reviewing the STPS2H100AFN datasheet, STPS2H100AFN pinout, STPS2H100AFN application, or STPS2H100AFN equivalent, key selection criteria include reverse leakage current (1 µA @ 25 °C, 1 mA @ 125 °C), thermal resistance (R_th(j-l) = 20 °C/W), ECOPACK2 compliance, and SMA Flat Notch mechanical footprint compatibility with high-density PCB layouts.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for fast recovery and minimal reverse recovery charge, eliminating minority-carrier storage effects. Its low VF–IR trade-off enables high efficiency in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) topologies.

The device features fully specified avalanche energy handling (P_ARM = 173 W at t_p = 10 µs, T_j = 125 °C) and supports surge currents up to 75 A (10 ms sine half-wave), making it suitable for transient-prone telecom and industrial DC input stages without external snubbers.

Key Specifications

Pinout & Package

STPS2H100AFN is housed in an SMA Flat Notch surface-mount package with cathode indicated by a band on the notch side. The package provides enhanced thermal conduction via exposed leadframe and supports automated optical inspection (AOI) due to its flat profile and defined notch orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS2H100U and VSSAF210-M3/84A, STPS2H100AFN uniquely combines notch-assisted placement accuracy, lowest R_th(j-l) among 2 A/100 V Schottkys in its class, and fully rated avalanche capability - making it optimal for space-constrained, high-reliability telecom and industrial DC/DC designs.

Availability

STPS2H100AFN is available at Aetrix Electronics and suitable for telecom power supplies, LED lighting drivers, and battery charger designs requiring stable component supply, long-term lifecycle support, and ECOPACK2 environmental compliance.

Supply support for STPS2H100AFN 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 analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

STPS2H100AFN belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, high-temperature power conversion in space- and thermal-constrained applications such as telecom infrastructure and portable power electronics.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS2H100AFN?

The datasheet specifies that 2.5 cm² of 35 µm-thick copper per lead achieves R_th(j-a) ≈ 40 °C/W on FR4. For best results, use solid copper pours under both leads connected via ≥4 thermal vias (0.3 mm diameter) to inner-layer ground planes. Avoid splitting the copper between leads - continuous thermal spread improves junction temperature stability by up to 15 °C at 2 A.

Does STPS2H100AFN require a heatsink in a 2 A, 100 kHz DC/DC converter?

No external heatsink is required. With R_th(j-l) = 20 °C/W and typical conduction loss of ~1.3 W at 2 A, junction temperature rise above lead temperature is ~26 °C. When mounted on ≥2.5 cm² copper per lead, total T_j remains below 125 °C even at 70 °C ambient - meeting full-rated operation without added thermal hardware.

How does the SMA Flat Notch package improve manufacturability versus standard SMA?

The notch provides unambiguous orientation reference for automated pick-and-place machines, reducing misalignment risk during high-speed assembly. Unlike standard SMA, the flat profile eliminates height variation (±0.05 mm tolerance), ensuring consistent solder joint formation and enabling AOI verification of cathode band position - critical for field-repairable telecom modules.

Is STPS2H100AFN suitable for use in automotive infotainment power supplies?

While not AEC-Q101 qualified, STPS2H100AFN has been deployed in non-safety-critical automotive subsystems (e.g., display backlighting, USB charging ports) where its 175 °C T_j(max), low VF, and avalanche rating meet thermal and reliability demands. For ASIL-B/C applications, ST recommends AEC-Q101-qualified alternatives like STPS3L60S.