STMicroelectronics STPS5H100SFY

Overview

STPS5H100SFY from STMicroelectronics is an AEC-Q101-qualified automotive power Schottky rectifier in PSMC (TO-277A) package, rated for 5 A average forward current, 100 V repetitive peak reverse voltage, and 175 °C maximum junction temperature. It delivers low forward voltage drop (0.545 V typ. at 5 A, 125 °C) and negligible switching losses, enabling high-efficiency DC/DC converters and reverse polarity protection circuits in engine control units and body electronics.

For engineers reviewing the STPS5H100SFY datasheet, STPS5H100SFY pinout, STPS5H100SFY application, or STPS5H100SFY equivalent, key selection criteria include its wettable flanks for automated optical inspection, avalanche capability (518 W at 10 µs), and guaranteed VRRM across -40 °C to +175 °C - critical for under-hood automotive thermal reliability.

Technical Context

This Schottky rectifier uses a planar metal-silicon junction optimized for low conduction loss and minimal reverse recovery charge. Its 0.545 V forward voltage at 5 A and 125 °C directly reduces power dissipation in high-duty-cycle freewheeling paths, while the 2.1 °C/W junction-to-case thermal resistance supports operation up to 160 °C case temperature without derating.

The device features specified avalanche energy handling (518 W, 10 µs pulse, Tj = 125 °C) and low leakage (≤5 mA at 125 °C, VR = VRRM), enabling robustness against load dump transients and reverse-bias stress in 12 V/24 V automotive systems.

Key Specifications

Pinout & Package

Package: PSMC (TO-277A), surface-mount, single-diode configuration with two anode terminals shorted internally and one cathode terminal. Wettable flanks enable automated optical inspection of solder joints.

Key Features

Applications

Availability

STPS5H100SFY is available at Aetrix Electronics and suitable for automotive power conversion, reverse polarity protection, freewheeling, and switching diode applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPS5H100SFY 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 STPS series targets automotive power rectification, delivering high-temperature reliability, low-loss performance, and AEC-Q101 compliance for under-hood and chassis-mounted electronics.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS5H100SFY supports continuous operation at Tc = 160 °C when IF(AV) = 5 A (δ = 0.5), as specified in Absolute Ratings Table 1. This is enabled by its 2.1 °C/W Rth(j-c) and 175 °C Tj(max), allowing use in thermally constrained engine bay locations without active cooling.

Does this diode require a heatsink for 5 A operation?

No external heatsink is required if PCB copper area provides sufficient thermal conduction: Figure 7 shows Rth(j-a) drops to ~10 °C/W with ≥10 cm² of 35 µm copper under the tab on FR4. For higher ambient temperatures or sealed enclosures, direct mounting to a metal chassis via the cathode tab is recommended.

How does the wettable flank design impact assembly yield?

The wettable flanks provide visible solder fillets on side walls, enabling automated optical inspection (AOI) to detect insufficient solder, bridging, or tombstoning. This eliminates reliance on X-ray for hidden-joint verification and improves first-pass yield in high-volume automotive PCB assembly lines.

Is STPS5H100SFY compatible with lead-free reflow profiles?

Yes - the device is qualified for standard lead-free reflow (J-STD-020, peak 260 °C, 10 s max). Its PSMC package uses matte tin terminations and epoxy rated UL94 V0, ensuring intermetallic formation and joint reliability under automotive thermal cycling requirements.