STMicroelectronics STPS3H100UF

Overview

STPS3H100UF from STMicroelectronics is a 100 V, 3 A low-profile SMBflat Schottky rectifier optimized for high-frequency DC/DC converters and AC/DC adapters. It delivers VF(max) = 0.68 V at 125 °C and IF = 3 A, with Tj(max) = 175 °C, negligible switching losses, and specified avalanche capability (PARM = 2400 W, tp = 1 µs). Its Rth(j-l) = 15 °C/W enables compact thermal design in space-constrained power supplies.

For engineers reviewing the STPS3H100UF datasheet, STPS3H100UF pinout, STPS3H100UF application, or STPS3H100UF equivalent, key selection criteria include forward voltage drop vs. temperature, reverse leakage at 125 °C, junction-to-lead thermal resistance, and SMBflat footprint compatibility with high-density PCB layouts.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal–semiconductor junction to eliminate minority-carrier storage delay, enabling operation up to several MHz without reverse recovery loss. Its low VF / IR trade-off is achieved via controlled barrier height and optimized doping profile.

The device supports repetitive avalanche energy handling (2400 W at 1 µs, Tj = 25 °C) and maintains stable conduction under transient overloads-critical for unregulated flyback and synchronous rectification stages where voltage spikes exceed VRRM during turn-off.

Key Specifications

Pinout & Package

STPS3H100UF is housed in an SMBflat (DO-214AA flat) surface-mount package: low-profile (A = 0.90–1.10 mm), lead-free, UL94 V0 compliant, with 5.10–5.60 mm body length (E), 3.30–3.95 mm width (D), and 0.75–1.50 mm lead length (L).

Key Features

Applications

Availability

STPS3H100UF is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, USB-C power delivery systems, and industrial SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STPS3H100UF 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency switched-mode power conversion where low VF, fast switching, and thermal robustness are mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STPS3H100UF has a rated maximum junction temperature of 175 °C. Operation at this limit requires strict thermal design: PCB copper area ≥ 5 cm² per lead, ambient ≤ 75 °C, and no sustained overload beyond IF(AV) = 3 A at TL = 140 °C. Derating is required above 125 °C case temperature per Figure 2.

How does STPS3H100UF differ from STPS3H100U?

STPS3H100UF uses the SMBflat (low-profile DO-214AA) package with height ≤ 1.10 mm and Rth(j-l) = 15 °C/W, while STPS3H100U uses standard SMB (DO-214AA) with height ≤ 2.45 mm and Rth(j-l) = 25 °C/W. Both share identical electrical specs, but UF enables thinner assemblies and better thermal performance in PCB-constrained designs.

Is STPS3H100UF suitable for synchronous rectification circuits?

STPS3H100UF is a passive Schottky rectifier-not a synchronous rectifier IC or driver. It functions as the freewheeling diode in self-driven or controller-driven synchronous topologies. Its low VF and zero Qrr make it ideal as the body-diode replacement or backup path when MOSFET gate drive fails.

Does this part meet JEDEC moisture sensitivity level (MSL) requirements?

Yes-STPS3H100UF is qualified per JEDEC J-STD-020, rated MSL 1 (unlimited floor life at ≤ 30 °C/85% RH). The SMBflat package uses moisture-resistant epoxy meeting UL94 V0, and devices are shipped in dry-packed tape-and-reel format per Table 7.