Taiwan Semiconductor Corporation SRS2050

Overview

SRS2050 from Taiwan Semiconductor is a 20A, 50V Schottky barrier surface-mount rectifier in TO-263AB (D2PAK) package, featuring 0.70 V forward voltage at 10 A and 25°C, 200 A surge capability, 1.5 °C/W junction-to-case thermal resistance, and 10 µA reverse leakage at 125°C - deployed in high-efficiency DC/DC converters.

For engineers reviewing the SRS2050 datasheet, SRS2050 pinout, SRS2050 application, or SRS2050 equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal performance under continuous conduction mode, low VF trade-off versus higher VRRM variants, and compatibility with automated SMT assembly for power supply front-end rectification.

Technical Context

The SRS2050 integrates dual Schottky die in a single TO-263AB package with common-cathode configuration, enabling high-current bidirectional rectification without external paralleling. Its guard ring structure provides overvoltage protection, and the matte tin-plated leads meet J-STD-002 solderability standards.

Rated for TJ = –55°C to +150°C operation, it supports high-temperature environments typical of enclosed SMPS designs. The 1.5 °C/W R_θJC enables direct heatsinking to PCB copper planes or external metal slugs, critical for maintaining <125°C junction temperature at full 20 A DC load.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, 3-terminal, common-cathode dual-diode configuration with exposed thermal pad (pin 2 = cathode, pins 1 & 3 = anodes).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH05-M3 and SB2050, the SRS2050 offers optimal balance of low-profile SMT compatibility, 1.5 °C/W thermal resistance, and 0.70 V forward voltage - making it preferred for space-constrained, high-power-density DC/DC converters where reflow process control and thermal pad soldering are well established.

Availability

SRS2050 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and AC/DC adapters requiring stable component supply, consistent parametric performance across production lots, and full traceability to Taiwan Semiconductor wafer fab L2103.

Supply support for SRS2050 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 power semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS diodes, and MOSFETs since 1979.

The SRS2050 belongs to TSC's SRS20xx Schottky rectifier product line, engineered for high-efficiency, high-reliability power conversion in commercial and industrial power supplies where low forward voltage and robust surge handling are critical.

FAQ

What is the maximum junction temperature rating for the SRS2050?

The SRS2050 has a maximum junction temperature (T_J) rating of +150°C, with operational range from –55°C to +150°C. This extended rating enables reliable use in enclosed, high-ambient-temperature environments such as sealed power supplies or industrial enclosures where ambient may reach 85°C and internal rise adds 65°C. The SRS2050 must be derated per its forward current derating curve above 110°C case temperature.

Does the SRS2050 have a common-cathode or common-anode configuration?

The SRS2050 uses a common-cathode dual-diode configuration: Pin 2 is the shared cathode, while Pins 1 and 3 serve as independent anodes. This topology supports center-tapped transformer rectification, dual-output supplies, or parallel anode paths with single output return - confirmed by TSC's marking diagram and mechanical outline drawing for TO-263AB package.

What is the reverse leakage current specification for the SRS2050 at elevated temperature?

The SRS2050 specifies 10 µA maximum reverse leakage current (I_R) per diode at rated V_RRM = 50 V and junction temperature T_J = 125°C. At T_J = 25°C, I_R is ≤500 µA. This low high-temperature leakage directly limits standby power loss in always-on power converters and improves efficiency retention across thermal operating ranges.

Is the SRS2050 compatible with lead-free reflow soldering profiles?

Yes, the SRS2050 is fully compatible with standard lead-free reflow profiles (J-STD-020, peak 260°C). Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level (MSL) is Level 1 - meaning no dry-pack or baking is required prior to assembly. The device's UL 94V-0 molding compound ensures stability during thermal cycling.

How does the guard ring feature in the SRS2050 improve reliability?

The guard ring in the SRS2050 provides edge termination that suppresses premature avalanche breakdown at the silicon periphery, increasing the device's ability to withstand transient overvoltage events such as load dump or inductive switching spikes. This structural enhancement allows the SRS2050 to sustain rated I_FSM = 200 A surges without parameter shift, extending mean time between failures in harsh electrical environments.