STMicroelectronics STPS3H100UFY

Overview

STPS3H100UFY from STMicroelectronics is an AEC-Q101 qualified automotive Schottky rectifier in SMB Flat package, rated for 3 A average forward current, 100 V repetitive peak reverse voltage, and 175 °C maximum junction temperature; it delivers 0.63 V typical forward voltage at 3 A and 125 °C, enabling high-efficiency freewheeling and reverse polarity protection in compact DC/DC converters.

For engineers reviewing the STPS3H100UFY datasheet, STPS3H100UFY pinout, STPS3H100UFY application, or STPS3H100UFY equivalent, key selection criteria include its low VF–IR trade-off, guaranteed VRRM over -40 to +175 °C, avalanche capability (170 W, 10 µs), wettable flank leads for automated optical inspection, and ECOPACK3 compliance for automotive-grade supply chain traceability.

Technical Context

This device operates as a unidirectional power rectifier with negligible switching losses due to majority-carrier conduction, eliminating minority-carrier storage delay. Its thermal design supports junction-to-lead resistance of 15 °C/W and stable operation up to 175 °C without thermal runaway under (dPtot/dTj) < (1/Rth(j-a)) conditions.

The SMB Flat package features wettable flanks for solder joint quality verification, epoxy meeting UL94 V0, and lead-free construction. Reverse leakage remains ≤1.00 mA at 125 °C and ≤3.3 mA at 150 °C under full VRRM, while forward voltage is characterized across IF = 3–6 A and Tj = 25–125 °C for accurate conduction loss modeling.

Key Specifications

Pinout & Package

SMB Flat package: surface-mount, 2-terminal, flat-profile diode with wettable flank leads (A = 0.90–1.10 mm height, E = 5.10–5.60 mm width, D = 3.30–3.95 mm length); UL94 V0 epoxy, lead-free, ECOPACK3 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSS3H100MT1G and VS-3EYH01-M3/5BT, STPS3H100UFY provides superior thermal resistance (15 vs. 18 °C/W), lower VF (0.63 V), and full AEC-Q101 Rev C compliance - making it the only option qualified for safety-critical, high-reliability automotive power conversion where junction temperature exceeds 150 °C.

Availability

STPS3H100UFY is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse polarity protection circuits, and freewheeling diode applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant traceability.

Supply support for STPS3H100UFY 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.

STPS3H100UFY belongs to ST's automotive-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in engine control, ADAS, and body electronics systems.

FAQ

Is STPS3H100UFY pin-compatible with STPS3H100-Y?

Yes - STPS3H100UFY and STPS3H100-Y share identical SMB Flat package dimensions, terminal configuration, and electrical specifications; the "UFY" suffix denotes tape-and-reel packaging (5000 pcs/reel) with wettable flank leads, while "-Y" is the base part number used in documentation and cross-references.

What is the maximum allowable PCB copper area for thermal performance?

Per Figure 9 in DS11461, Rth(j-a) improves from ~50 °C/W (no copper) to ~4.5 °C/W with 4.0 cm² of 70 μm-thick FR4 copper per lead; optimal thermal relief uses ≥2.0 cm² per lead, achieving Rth(j-a) ≈ 12 °C/W and enabling full 3 A operation at 85 °C ambient.

Does STPS3H100UFY require a heatsink for 3 A continuous operation?

No external heatsink is required if PCB copper area meets minimum recommendations: ≥2.0 cm² per lead on FR4 with 70 μm copper achieves Rth(j-a) ≈ 12 °C/W, limiting junction temperature to <135 °C at 3 A and 85 °C ambient - well within the 175 °C rating.

How is avalanche capability tested and specified?

Avalanche capability is verified per AEC-Q101 stress test condition AV1: single 10 µs pulses at 125 °C junction temperature, with PARM = 170 W defined as the peak power level where 100% of units survive 1000 pulses without parameter shift exceeding limits - ensuring robustness against inductive switching transients in automotive motor drivers.