STMicroelectronics STPS1H100AY

Overview

STPS1H100AY from STMicroelectronics is an AEC-Q101-qualified automotive Schottky rectifier in SMA package, rated for 100 V repetitive peak reverse voltage (V_RRM), 1 A average forward current (I_F(AV)), and maximum junction temperature of +175 °C. It delivers low forward voltage drop (0.62 V max at 1 A, 125 °C) with negligible switching losses, and is designed for DC/DC converters in LED lighting, ADAS power supplies, and engine control units.

For engineers reviewing the STPS1H100AY datasheet, STPS1H100AY pinout, STPS1H100AY application, or STPS1H100AY equivalent, key selection criteria include its high-temperature operation up to +175 °C, low leakage current (0.5 mA max at 125 °C), avalanche-rated capability (108 W, 10 µs), thermal resistance (R_th(j-l) = 30 °C/W), and ECOPACK®2 compliance for automotive-grade reliability.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for high-frequency switching in automotive DC/DC conversion. Its low V_F–I_F trade-off enables efficient conduction at 1 A while maintaining sub-µA leakage at 25 °C and <0.5 mA at 125 °C under full V_RRM.

The device supports robust thermal management via low R_th(j-l) (30 °C/W) and specified avalanche energy handling (P_ARM = 108 W, t_p = 10 µs). V_RRM is guaranteed across -40 °C to +175 °C, enabling use in under-hood environments without derating.

Key Specifications

Pinout & Package

SMA package: surface-mount, 2-terminal, single-diode configuration with cathode band marking. Dimensions: D = 2.25–2.90 mm, E = 4.80–5.35 mm, L = 0.75–1.50 mm, weight = 0.068 g. UL94 V0 epoxy, lead-free, ECOPACK®2 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS1H100AY, STPS1L100S offers superior thermal dissipation in SMB but requires more PCB area, while NSS1C200MT1G lacks AEC-Q101 validation and avalanche rating-making it unsuitable for ADAS or ECU use despite identical voltage/current ratings.

Availability

STPS1H100AY is available at Aetrix Electronics and suitable for automotive LED lighting, ADAS camera power supplies, and engine control unit (ECU) bias rails requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPS1H100AY 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 automotive, industrial, and power management solutions with vertical manufacturing and AEC-Q100/Q101 qualification expertise.

The STPSxH100-Y series is part of ST's automotive Schottky rectifier product line, engineered specifically for high-reliability DC/DC conversion in harsh under-hood environments where thermal stability, transient robustness, and long-term parametric consistency are mandatory.

FAQ

Is STPS1H100AY suitable for synchronous rectification?

No-STPS1H100AY is a passive Schottky rectifier, not a synchronous MOSFET driver or integrated controller. It functions as a unidirectional freewheeling or output rectifier in conventional buck/flyback topologies, relying on inherent Schottky conduction rather than gate-controlled switching.

What is the maximum surge current rating for STPS1H100AY?

The non-repetitive forward surge current (I_FSM) is 50 A for a 10 ms sinusoidal half-cycle, as specified in Table 1 of DS6946 Rev 2. This rating applies at T_j = 25 °C and assumes proper PCB copper area for thermal spreading.

Does STPS1H100AY require a heatsink in typical automotive applications?

No external heatsink is required. With R_th(j-l) = 30 °C/W and I_F(AV) = 1 A, junction temperature rise is ~18.6 °C above lead temperature at 0.62 V V_F. Standard 1 oz. copper pads per lead (≥1 cm² each) provide sufficient thermal path for operation up to +175 °C junction.

How does the avalanche rating impact system-level design?

The 108 W repetitive avalanche power rating (t_p = 10 µs, T_j = 125 °C) allows STPS1H100AY to safely absorb inductive energy from relay coils, solenoids, or transformer leakage without failure-reducing need for external snubbers in ECU and body-control module designs.