Taiwan Semiconductor Corporation SRS2020H

Overview

SRS2020H from Taiwan Semiconductor is a 20A, 20V AEC-Q101-qualified Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.55V forward voltage at 10A/25°C, 200A surge capability, and junction-to-case thermal resistance of 1.5°C/W. It serves as a low-loss freewheeling or reverse-battery protection diode in automotive DC/DC converters.

For engineers reviewing the SRS2020H datasheet, SRS2020H pinout, SRS2020H application, or SRS2020H equivalent, key selection criteria include its 20V V_RRM, dual-die configuration, AEC-Q101 qualification, moisture sensitivity level 1 rating, and TO-263AB thermal performance for high-reliability 12V automotive power rails.

Technical Context

The SRS2020H employs a dual-die Schottky structure optimized for low forward voltage and fast switching in low-voltage, high-frequency power conversion. Its 20V repetitive peak reverse voltage and 200A non-repetitive surge rating support robust operation under transient load conditions.

Thermally, it delivers 1.5°C/W junction-to-case resistance with a maximum junction temperature of +125°C (derated to +150°C per family spec), enabling stable conduction in compact automotive modules where heatsinking is limited.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK) - Surface-mount power package with exposed drain pad for thermal and electrical connection; 3-terminal configuration (Anode, Cathode, Cathode).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ020-M3/45 and MBR2020CT, the SRS2020H uniquely combines AEC-Q101 qualification, moisture sensitivity level 1, and 1.5°C/W thermal resistance in a D2PAK footprint-making it the only option qualified for automated production of next-generation automotive power modules requiring zero bake and under-hood thermal resilience.

Availability

SRS2020H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and LED lighting drivers requiring stable component supply across multi-year vehicle production cycles.

Supply support for SRS2020H 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive and industrial markets since 1979.

The SRS2020H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, thermally constrained 12V automotive power conversion and reverse polarity protection.

FAQ

What is the maximum junction temperature rating for the SRS2020H?

The SRS2020H has a maximum junction temperature (T_J) rating of +125°C for continuous operation, with short-duration capability up to +150°C per family specification. This allows sustained conduction in engine bay–mounted modules where ambient temperatures exceed 85°C, provided thermal design maintains junction temperature below the rated limit. The SRS2020H's 1.5°C/W R_θJC enables effective heat transfer to PCB copper pours or heatsinks.

Is the SRS2020H pin-compatible with other parts in the SRS20xxH series?

No-the SRS2020H shares the same TO-263AB (D2PAK) package and 3-terminal pinout with all SRS20xxH variants, but voltage ratings differ across the family (20V to 150V). While mechanical mounting is identical, substituting SRS2020H for higher-voltage variants like SRS2060H compromises reverse blocking capability and risks catastrophic failure under 60V+ transients. Always verify V_RRM against system-level voltage stress for each SRS2020H application.

Does the SRS2020H require baking before reflow soldering?

No-SRS2020H is rated at moisture sensitivity level (MSL) 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-bake. This eliminates process steps and cost in high-volume SMT lines. The SRS2020H's matte tin-plated leads also ensure consistent solderability without oxidation concerns during standard tape-and-reel handling.

What is the typical forward voltage of the SRS2020H at operating conditions?

The SRS2020H exhibits a typical forward voltage (V_F) of 0.55 V at 10 A and 25°C junction temperature, measured with 0.3 ms pulse width. At elevated temperatures (e.g., 100°C), V_F decreases slightly due to Schottky physics, remaining ≤0.52 V. This low V_F directly reduces conduction losses in automotive 12V power rails, making the SRS2020H especially valuable in thermally dense modules where every watt of dissipation matters.

How does the guard ring feature improve reliability of the SRS2020H?

The guard ring in the SRS2020H enhances edge termination robustness by distributing electric field stress away from the active junction periphery. This mitigates premature avalanche breakdown under transient overvoltage events-such as load dump spikes-and suppresses surface leakage current in high-humidity under-hood environments. As a result, the SRS2020H maintains stable reverse leakage (<500 µA at 25°C) and long-term reliability in automotive applications where environmental stress is severe.