Taiwan Semiconductor Corporation SRS1050H

Overview

SRS1050H from Taiwan Semiconductor is a 10 A, 50 V repetitive peak reverse voltage Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.70 V forward voltage at 5 A and 25 °C, 120 A surge capability, AEC-Q101 qualification, and dual-die construction for high-efficiency DC/DC conversion in automotive lighting systems.

For engineers reviewing the SRS1050H datasheet, SRS1050H pinout, SRS1050H application, or SRS1050H equivalent, key selection criteria include its 50 V V_RRM, 10 A continuous forward current rating, low thermal resistance (2 °C/W), junction temperature range up to +150 °C, and moisture sensitivity level 1 compliance - all critical for under-hood automotive power designs.

Technical Context

The SRS1050H employs dual Schottky die in a single TO-263AB (D2PAK) package with common-cathode configuration, enabling freewheeling and reverse-battery protection functions without external parallel diodes. Its guard ring structure provides overvoltage robustness, while matte tin-plated leads ensure solderability per J-STD-002.

Thermally, it delivers 2 °C/W junction-to-case resistance and supports operation from –55 °C to +150 °C, with reverse leakage limited to 500 µA at 25 °C and 10 mA at 100 °C - confirming suitability for thermally constrained automotive DC/DC stages.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, 3-terminal, common-cathode dual-diode configuration. Case material meets UL 94V-0; terminals are matte tin-plated per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ050 and SB1050, the SRS1050H uniquely combines AEC-Q101 qualification, +150 °C junction rating, and 500 µA low-leakage performance at 25 °C - making it the only choice for thermally aggressive, safety-critical automotive power stages requiring long-term reliability validation.

Availability

SRS1050H is available at Aetrix Electronics and suitable for automotive LED lighting, 24 V DC/DC conversion, and reverse-battery protection applications requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for SRS1050H 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SRS1050H belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-reliability, high-efficiency power conversion in automotive electrical systems - especially under-hood lighting and DC/DC regulation.

FAQ

What is the maximum junction temperature rating for the SRS1050H?

The SRS1050H has a maximum junction temperature rating of +150 °C, verified per AEC-Q101 stress testing. This allows uninterrupted operation in high-ambient environments such as automotive engine compartments. The device maintains specified electrical parameters up to this limit, and its thermal resistance (R_θJC = 2 °C/W) supports reliable heat dissipation when mounted on adequate copper area. Always refer to the derating curve in the official SRS1050H datasheet for current reduction versus case temperature.

Is the SRS1050H pin-compatible with other parts in the SRS10xxH series?

Yes, all SRS10xxH devices - including SRS1020H through SRS10150H - share identical TO-263AB (D2PAK) packaging, pinout, and mechanical dimensions. The SRS1050H uses the same three-terminal common-cathode layout as its siblings, enabling direct board-level substitution when voltage rating changes are acceptable. However, forward voltage and leakage current vary across the series, so electrical validation is required before replacement.

Does the SRS1050H meet automotive reliability standards?

Yes, the SRS1050H is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD). It also complies with J-STD-020 moisture sensitivity level 1 and JESD201 class 2 whisker testing. These qualifications confirm its suitability for automotive power electronics where long-term reliability under thermal and mechanical stress is mandatory.

What is the forward voltage specification for the SRS1050H at operating conditions?

The SRS1050H exhibits a typical forward voltage (V_F) of 0.70 V at 5 A and 25 °C, measured per pulse test (PW = 0.3 ms). At higher temperatures (e.g., 100 °C), V_F decreases slightly due to Schottky physics, but conduction losses remain low. This value is confirmed in the "Electrical Specifications" table of the official SRS1050H datasheet and is critical for calculating power loss and thermal design in DC/DC converters.

Can the SRS1050H be used in reverse-battery protection circuits?

Yes, the SRS1050H is explicitly recommended for reverse-battery protection in automotive applications. Its 50 V V_RRM provides sufficient margin against reverse transients (e.g., ISO 7637-2 Pulse 1), and its low forward voltage minimizes insertion loss. When placed anode-to-battery and cathode-to-system, it blocks reverse current while allowing normal forward operation. The dual-die structure also supports redundancy or split-current configurations in high-reliability designs.