STMicroelectronics STPS2H100A

Overview

STPS2H100A from STMicroelectronics is a 100 V, 2 A Schottky rectifier in SMA package, designed for high-frequency switched-mode power supplies. It delivers low forward voltage drop (0.65 V max at 2 A, 125 °C), negligible switching losses, and operates up to 175 °C junction temperature-enabling compact, efficient DC/DC converters in telecom and LED lighting systems.

For engineers reviewing the STPS2H100A datasheet, STPS2H100A pinout, STPS2H100A application, or STPS2H100A equivalent, key selection criteria include its avalanche-rated 100 V reverse blocking, thermal robustness (R_th(j-l) = 30 °C/W), low leakage (<1 µA @ 25 °C), ECOPACK2 compliance, and suitability for space-constrained board-level power conversion.

Technical Context

This Schottky diode uses a planar silicon structure optimized for fast recovery and minimal reverse recovery charge-critical for >100 kHz SMPS operation. Its low VF–IR trade-off is achieved via controlled metal–semiconductor barrier engineering, enabling stable conduction at high ambient temperatures without thermal runaway under defined heatsinking conditions.

The device supports repetitive avalanche energy (173 W at 10 µs, T_j = 125 °C) and features specified surge capability (75 A non-repetitive, 10 ms sine half-wave). Package variants-including SMA, SMA Flat, and SMB Flat-are thermally characterized with distinct R_th(j-l) values (30–15 °C/W) to match PCB copper area and cooling strategy.

Key Specifications

Pinout & Package

STPS2H100A is housed in an SMA (DO-214AC) surface-mount package with two terminals: anode and cathode. The cathode is marked by a band on the body. Thermal performance depends on PCB copper pad layout per Figure 23 in DS1452.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB2100 and SS210HE3/5AT, STPS2H100A uniquely combines 100 V/2 A rating, 0.65 V V_F ceiling at 125 °C, 175 °C T_j(max), and guaranteed avalanche energy-making it optimal for thermally aggressive, high-reliability SMPS where both efficiency and ruggedness are mandatory.

Availability

STPS2H100A is available at Aetrix Electronics and suitable for battery chargers, telecom power supplies, LED lighting drivers, and industrial SMPS requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPS2H100A 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, specializing in power management, analog, microcontrollers, and automotive ICs-with over 40 years of discrete power device innovation.

The STPS2H100A belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, high-frequency DC/DC conversion in space- and thermally-constrained applications such as telecom infrastructure and solid-state lighting.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS2H100A in SMA package?

For the SMA package, optimal thermal performance is achieved with ≥1.5 cm² of 35 µm-thick copper per lead, reducing R_th(j-a) from 100 °C/W (no copper) to ~40 °C/W. Figure 14 in DS1452 shows R_th(j-a) versus copper area; exceeding 2.0 cm² yields diminishing returns beyond 35 °C/W.

Does STPS2H100A require a heatsink in typical 2 A continuous operation?

No dedicated heatsink is required if PCB layout provides ≥1.5 cm² of 35 µm copper per lead and ambient temperature stays ≤50 °C. At 2 A and 50 °C ambient, junction temperature reaches ~125 °C-within the 175 °C limit. Derating is needed above 50 °C ambient or with reduced copper area.

Can STPS2H100A replace a standard PN rectifier like 1N5822 in an existing design?

Yes-STPS2H100A is a direct drop-in replacement for 1N5822 (100 V/3 A) in SMA footprint, offering lower V_F (0.65 V vs. 0.9 V), faster switching, and higher T_j(max) (175 °C vs. 125 °C). No circuit changes are needed, but efficiency improves by ~3–5% and thermal margin increases significantly.

Is STPS2H100A suitable for use in automotive applications?

STPS2H100A is not AEC-Q101 qualified and lacks automotive-specific qualification testing (e.g., HTOL, temperature cycling). While its 175 °C T_j(max) and robust avalanche rating support under-hood temperature ranges, it is intended for industrial, telecom, and lighting-not automotive safety-critical systems.