Taiwan Semiconductor Corporation SR4050PTH

Overview

SR4050PTH from Taiwan Semiconductor is a 40A, 50V AEC-Q101-qualified Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.70V forward voltage at 20A/25°C, 400A surge capability, and dual-die construction for high-efficiency DC/DC conversion in automotive power supplies.

For engineers reviewing the SR4050PTH datasheet, SR4050PTH pinout, SR4050PTH application, or SR4050PTH equivalent, key selection criteria include repetitive peak reverse voltage (50 V), junction-to-case thermal resistance (1.2 °C/W), AEC-Q101 qualification status, and UL recognition (E-326243) for safety-critical power systems.

Technical Context

This device implements a dual-die Schottky architecture with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its 1.2 °C/W R_θJC enables high-power dissipation in constrained thermal environments.

Rated for -55°C to +150°C junction operation, SR4050PTH delivers 1000 µA max reverse leakage at 25°C and 20 mA at 100°C under rated 50 V reverse bias - critical for maintaining efficiency in high-temperature SMPS and automotive DC/DC converters.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - isolated metal tab package with three terminals, UL 94V-0 molding compound, and 6.10 g mass. Mounting torque ≤ 1.13 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-40CPH05 and MBR4050CT, SR4050PTH uniquely combines AEC-Q101 qualification, 1.2 °C/W thermal resistance, and dual-die flexibility - making it optimal for thermally demanding automotive and high-reliability industrial power stages where long-term stability under thermal cycling is mandatory.

Availability

SR4050PTH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS, and consumer TV power supplies requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SR4050PTH 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SR40xPT series was developed specifically for high-current, high-reliability Schottky rectification in automotive-grade power conversion - emphasizing thermal robustness, surge resilience, and safety certification compliance.

FAQ

What is the maximum junction temperature rating for SR4050PTH?

The SR4050PTH has a maximum junction temperature (T_J) rating of +150°C, validated across its full operating range per AEC-Q101 stress testing. This rating supports sustained operation in under-hood automotive environments and high-ambient industrial power supplies. The SR4050PTH maintains specified electrical parameters up to this limit when thermal design ensures junction temperature does not exceed +150°C.

Is SR4050PTH pin-compatible with other parts in the SR40xPT family?

Yes, all SR40xPT and SR40xPTH variants - including SR4020PTH, SR4030PTH, SR4040PTH, SR4050PTH, SR4060PTH, SR4090PTH, and SR40100PTH - share identical TO-247AD (TO-3P) mechanical footprint, pinout, and terminal assignment. Voltage rating differences do not affect physical compatibility, enabling board-level voltage scalability without layout changes.

Does SR4050PTH require derating at elevated ambient temperatures?

Yes, SR4050PTH must be derated per its forward current derating curve: at 100°C case temperature, maximum continuous I_F drops to approximately 28 A; at 125°C, it falls to ~20 A. Derating ensures junction temperature remains within the +150°C limit. Thermal design must account for R_θJC = 1.2 °C/W and system-level R_θCA to determine safe operating current.

What does the "H" suffix in SR4050PTH signify?

The "H" suffix in SR4050PTH indicates full AEC-Q101 qualification per Rev H2103 specification, covering stress tests including HTGB, HTRB, TC, UHAST, and ESD. This distinguishes SR4050PTH from standard SR4050PT, which shares electrical specs but lacks automotive reliability validation. Only SR4050PTH carries the UL Recognition (E-326243) and halogen-free certification.

How is the dual-die configuration of SR4050PTH utilized in circuit design?

The SR4050PTH's dual-anode/single-cathode topology allows flexible implementation: both anodes can be paralleled for 80 A total current sharing, or independently routed for dual-output synchronous rectification (e.g., ±12 V rails). No external balancing resistors are needed due to matched die characteristics. This configuration reduces component count versus two discrete TO-247 Schottkys while maintaining identical thermal interface area.