Taiwan Semiconductor Corporation SR2040PT

Overview

SR2040PT from Taiwan Semiconductor is a 20A, 40V repetitive peak reverse voltage Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 10A/25°C, 200A surge capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in DC-DC converters and SMPS for industrial power supplies.

For engineers reviewing the SR2040PT datasheet, SR2040PT pinout, SR2040PT application, or SR2040PT equivalent, key selection criteria include V_RRM = 40 V, I_F = 20 A continuous, R_θJC = 1.5 °C/W, TJ max = 125°C (standard) or 150°C (AEC-Q101 variant), and low IR ≤ 500 µA at 25°C.

Technical Context

This dual-die Schottky rectifier uses guard ring structure for overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its thermal design supports 1.5 °C/W junction-to-case resistance, enabling high-power-density layouts in constrained thermal environments.

The device operates across -55°C to +125°C (or +150°C for AEC-Q101 version), with reverse leakage limited to 15 mA at 100°C and 500 µA at 25°C - critical for maintaining efficiency in high-temperature DC-DC stages.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - isolated metal tab, 3-terminal through-hole package with center anode/cathode configuration and mechanical polarity marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ040-M3 and MUR2040CT, the SR2040PT delivers superior thermal performance (R_θJC = 1.5 °C/W) and lower forward drop than silicon alternatives, making it optimal for high-density, thermally challenged 20A rectification where reliability and efficiency are co-prioritized.

Availability

SR2040PT is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and industrial adapters requiring stable component supply and long-term manufacturability.

Supply support for SR2040PT 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, specializing in power rectifiers, TVS devices, and MOSFETs since 1979.

The SR20xxPT series was developed to deliver high-current Schottky rectification with automotive-grade reliability and industrial thermal robustness in standard TO-247AD packaging.

FAQ

What is the maximum junction temperature rating for SR2040PT?

The SR2040PT has a maximum junction temperature of 125°C for standard grade and 150°C for the AEC-Q101 qualified version. This rating is defined under steady-state conditions with proper heatsinking and must not be exceeded during operation to ensure long-term reliability and parametric stability of the SR2040PT.

Is SR2040PT pin-compatible with other parts in the SR20xxPT family?

Yes, all SR20xxPT variants - including SR2020PT, SR2030PT, SR2040PT, SR2050PT, and up to SR20150PT - share identical TO-247AD (TO-3P) package dimensions, pinout, and mechanical footprint. The SR2040PT can be substituted within the same family without PCB layout changes, provided voltage and thermal requirements are verified.

Does SR2040PT require a heatsink in 20A continuous operation?

Yes, the SR2040PT requires a heatsink for 20A continuous operation. With R_θJC = 1.5 °C/W and typical V_F = 0.55 V, power dissipation exceeds 11 W - necessitating a heatsink to maintain junction temperature below 125°C. Thermal design must account for ambient temperature, airflow, and interface resistance when sizing the heatsink for the SR2040PT.

What does the "PT" suffix indicate in SR2040PT?

The "PT" suffix in SR2040PT denotes Taiwan Semiconductor's standard plastic TO-247AD (TO-3P) package with matte tin-plated leads, UL 94V-0 molding compound, and compliance with JESD201 Class 2 whisker testing. It distinguishes this industrial-grade version from lead-free or automotive-qualified variants (e.g., SR2040PTH).

How does SR2040PT perform at elevated temperatures?

At 100°C junction temperature, the SR2040PT exhibits forward voltage increase to ~0.48 V and reverse leakage current of ≤15 mA at rated 40 V. These shifts are fully characterized in the datasheet curves and remain within specification limits, confirming stable operation in high-ambient environments such as enclosed industrial enclosures where the SR2040PT is commonly deployed.