Taiwan Semiconductor Corporation SRS2050H

Overview

SRS2050H from Taiwan Semiconductor is a 20A, 50V AEC-Q101-qualified Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.70 V forward voltage at 10 A and 25 °C, 200 A surge current capability, and junction-to-case thermal resistance of 1.5 °C/W - deployed in automotive DC/DC converters and reverse battery protection circuits.

For engineers reviewing the SRS2050H datasheet, SRS2050H pinout, SRS2050H application, or SRS2050H equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 10 mA reverse leakage at 125 °C, dual-die configuration, RoHS/halogen-free compliance, and suitability for high-frequency freewheeling in automotive power systems.

Technical Context

The SRS2050H integrates two Schottky die in a single TO-263AB (D2PAK) thermally optimized package, enabling high-current conduction with low forward loss. Its guard ring structure provides overvoltage protection, and the matte tin-plated leads meet J-STD-002 solderability requirements.

Rated for operation from –55 °C to +150 °C junction temperature, the device supports high-reliability automotive applications under transient thermal stress, with transient thermal impedance curves confirming stable performance during 8.3 ms half-sine surge events up to 200 A.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, 3-terminal case with exposed cathode tab for thermal and electrical connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH05-M3 and MBR2050CT, the SRS2050H uniquely combines AEC-Q101 qualification, TO-263AB thermal performance (R_θJC = 1.5 °C/W), and integrated guard ring - making it the only drop-in solution for space-constrained, high-reliability automotive power rails.

Availability

SRS2050H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and LED headlamp drivers requiring stable component supply across production lifecycles.

Supply support for SRS2050H 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 SRS2050H belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-current, high-temperature automotive power conversion where low V_F, surge resilience, and long-term reliability are mandatory.

FAQ

What is the maximum junction temperature rating for the SRS2050H?

The SRS2050H has a maximum junction temperature (T_J) rating of +150 °C, validated per AEC-Q101 stress testing. This allows operation in under-hood environments where ambient temperatures exceed 105 °C. The device maintains specified electrical parameters up to this limit, provided thermal design achieves R_θJC ≤ 1.5 °C/W via adequate copper pour on the cathode tab. Derating curves confirm usable current capacity down to 125 °C ambient at full 20 A load.

Is the SRS2050H pin-compatible with other parts in the SRS20xxH series?

Yes, all SRS20xxH devices - including SRS2020H through SRS20150H - share identical TO-263AB (D2PAK) mechanical dimensions, pinout, and terminal configuration. The SRS2050H uses Anode 1, Anode 2, and common Cathode (tab), matching the footprint and solder pad layout of SRS2030H, SRS2040H, and others. Voltage rating differences do not affect physical compatibility, enabling design reuse across 20–150 V system variants.

Does the SRS2050H require special handling for moisture sensitivity?

No, the SRS2050H is rated Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/85% RH and processed using standard reflow profiles without baking. This eliminates dry-pack requirements and simplifies SMT line integration - a key advantage over MSL-3 or MSL-4 Schottky rectifiers that mandate time-limited floor life and pre-bake steps before assembly.

What is the reverse leakage current specification for the SRS2050H at elevated temperature?

At 50 V reverse bias and 125 °C junction temperature, the SRS2050H exhibits a maximum reverse leakage current (I_R) of 10 mA per diode. This value is confirmed in the Electrical Specifications table and critical for battery-sensitive applications like always-on telematics modules, where cumulative leakage across multiple diodes could impact quiescent current budgets. At 25 °C, I_R is limited to 500 µA.

How does the guard ring feature improve reliability in automotive applications?

The guard ring in the SRS2050H prevents premature edge breakdown under high dv/dt or voltage overshoot conditions common in automotive 12 V systems - such as load dump (ISO 7637-2 Pulse 5a) or alternator field decay. By controlling electric field distribution at the silicon periphery, it ensures the full 50 V V_RRM rating is sustained across temperature and lifetime, reducing field failure risk in safety-critical power paths where the SRS2050H is deployed.