STMicroelectronics STPS5H100AF

Overview

STPS5H100AF from STMicroelectronics is a high-voltage Schottky barrier rectifier in SOD128Flat package, rated for 100 V repetitive peak reverse voltage and 5 A average forward current at 115 °C, with typical forward voltage drop of 0.51 V at 125 °C and 2.5 A - designed for high-frequency DC-DC converters and miniature switched-mode power supplies.

For engineers reviewing the STPS5H100AF datasheet, STPS5H100AF pinout, STPS5H100AF application, or STPS5H100AF equivalent, key selection criteria include low conduction loss (VF = 0.51 V @ Tj = 125 °C), high junction temperature capability (Tj(max) = 175 °C), negligible switching losses, avalanche-rated robustness (165 W peak), and ECOPACK®-compliant lead-free packaging.

Technical Context

This Schottky rectifier uses a planar metal-silicon junction optimized for high-frequency operation, minimizing reverse recovery charge and eliminating minority-carrier storage delay. Its thermal design supports junction-to-lead resistance of 16 °C/W, enabling direct mounting on PCB copper without external heatsink under moderate load conditions.

The device meets avalanche energy rating requirements (PARM = 165 W, tp = 10 µs at Tj = 125 °C) and exhibits low leakage current (≤4 mA @ VR = 100 V, Tj = 125 °C), balancing VF vs. IR trade-off for efficiency-critical 100 V-class SMPS outputs.

Key Specifications

Pinout & Package

SOD128Flat is a surface-mount, flat-lead plastic package with two terminals: anode and cathode. It features exposed copper leads for enhanced thermal conduction and complies with ECOPACK® environmental standards (lead-free, UL94 V0 epoxy).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR5H100FCT and VS-5EY100-M3, STPS5H100AF delivers the lowest VF (0.51 V), highest avalanche energy (165 W), and best thermal resistance (16 °C/W), making it optimal for space-constrained, high-efficiency, and transient-rugged 100 V SMPS designs.

Availability

STPS5H100AF is available at Aetrix Electronics and suitable for AC-DC adapters, USB PD fast-charging modules, and industrial PLC power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for STPS5H100AF 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 industrial, automotive, and consumer markets.

The STPS series targets high-efficiency power conversion, with STPS5H100AF specifically engineered for 100 V-class Schottky rectification in high-frequency, thermally constrained DC-DC and SMPS applications.

FAQ

Is STPS5H100AF suitable for synchronous rectification circuits?

No - STPS5H100AF is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or driver. It operates as an uncontrolled diode and cannot be actively gated. For synchronous rectification, discrete N-channel MOSFETs with gate drivers (e.g., ST's SRK1001 controller) are required.

What is the recommended PCB layout for thermal performance?

Maximize copper area under both anode and cathode pads using ≥2 oz copper and thermal vias to inner ground planes. Per Figure 8 in the datasheet, 4.5 cm² total copper surface reduces Rth(j-a) to ~45 °C/W. Avoid narrow traces; maintain ≥1.5 mm pad extension beyond SOD128Flat footprint (E = 4.6–4.8 mm, E1 = 3.7–3.9 mm).

Does STPS5H100AF require derating above 25 °C ambient?

Yes - derating is mandatory. Figure 2 shows IF(AV) drops from 5 A at Tamb = 25 °C to ~3.2 A at Tamb = 70 °C (δ = 0.5). Derating follows linear interpolation between points; full 5 A rating applies only when lead temperature TL ≤ 115 °C, verified via thermal simulation or thermocouple measurement.

Can STPS5H100AF replace standard PN-junction rectifiers like 1N5408?

Only in high-frequency applications (<100 kHz) where its zero Qrr advantage matters. At 50/60 Hz line frequency, 1N5408's higher VF is acceptable, but STPS5H100AF's 100 V rating and 5 A average current exceed 1N5408's 1000 V / 3 A specs. Direct substitution is unsafe without verifying circuit topology, thermal design, and surge current margins.