Taiwan Semiconductor Corporation SR3040PT

Overview

SR3040PT from Taiwan Semiconductor is a 30A, 40V repetitive peak reverse voltage Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring dual-die construction, 0.55V forward voltage at 15A/25°C, and 300A surge capability - deployed in high-efficiency SMPS and DC-DC converters for industrial power supplies.

For engineers reviewing the SR3040PT datasheet, SR3040PT pinout, SR3040PT application, or SR3040PT equivalent, key selection criteria include V_RRM = 40 V, I_F = 30 A continuous, R_θJC = 1.5 °C/W, TJ max = 125°C (standard version), and AEC-Q101 qualification availability (H-suffix variant).

Technical Context

This Schottky rectifier uses dual-die parallel configuration to achieve 30A average forward current with low conduction loss. Its guard ring structure enhances overvoltage robustness, and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Thermal performance is defined by 1.5°C/W junction-to-case resistance, enabling high-power dissipation in forced-air or heatsink-mounted applications. The device operates across -55°C to +125°C junction temperature range and supports 8.3ms half-sine surge up to 300A without failure.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - isolated tab, 3-terminal through-hole package with center anode/cathode configuration and mechanical mounting hole; 6.10g mass, UL 94V-0 molding compound, polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH04-M3 and MBR3045CT, the SR3040PT offers superior thermal performance (1.5°C/W), standardized TO-247AD mechanical footprint, and optional AEC-Q101 qualification - making it optimal for industrial and automotive-grade power conversion where reliability and thermal headroom are critical.

Availability

SR3040PT is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and flat-panel TV power boards requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for SR3040PT 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 SR30xxPT series was designed specifically for high-current, low-loss secondary-side rectification in high-density AC/DC and isolated DC-DC power supplies targeting industrial, computing, and consumer electronics markets.

FAQ

What is the maximum junction temperature rating for SR3040PT?

The SR3040PT has a maximum junction temperature (T_J) of +125°C for the standard version. This rating applies under continuous operation with proper heatsinking and defines the upper limit of the derating curve. The device can operate from -55°C to +125°C, and its thermal performance is validated with R_θJC = 1.5°C/W. Always consult the forward current derating curve in the SR3040PT datasheet for ambient-temperature-specific current limits.

Is SR3040PT AEC-Q101 qualified?

The base SR3040PT part is not AEC-Q101 qualified; however, the AEC-Q101-qualified version is designated SR3040PTH (with 'H' suffix). Both share identical electrical and thermal specifications, including V_RRM = 40 V, I_F = 30 A, and V_F = 0.55 V at 15A/25°C. The 'H' variant undergoes additional stress testing per AEC-Q101 standards and is marked accordingly on the device body.

What is the forward voltage specification for SR3040PT at elevated temperature?

At I_F = 15A and T_J = 100°C, the SR3040PT exhibits a typical forward voltage of ≤ 0.55 V - matching its 25°C value due to Schottky's near-zero temperature coefficient. This stable V_F behavior minimizes thermal runaway risk and simplifies thermal design in high-ambient environments such as enclosed power supplies.

Does SR3040PT have isolated or non-isolated mounting tab?

The SR3040PT uses a TO-247AD (TO-3P) package with an electrically isolated tab - meaning the metal case is not internally connected to any lead. In this configuration, the cathode is connected to Lead 2 and the tab is separate, allowing direct heatsink mounting without insulation. Polarity marking on the device confirms cathode orientation, and mounting torque must not exceed 1.13 N·m.

What is the reverse leakage current of SR3040PT at rated voltage and high temperature?

At V_R = 40 V and T_J = 100°C, the SR3040PT exhibits a maximum reverse leakage current (I_R) of 20 mA per diode. At 25°C and same voltage, leakage is limited to 1000 µA. These values are measured under specified pulse conditions (30 ms PW) and reflect real-world performance in warm-running power supplies where leakage impacts standby efficiency and thermal stability.