Taiwan Semiconductor Corporation SRS1090

Overview

SRS1090 from Taiwan Semiconductor is a 10A, 90V Schottky barrier surface-mount rectifier in TO-263AB (D2PAK) package, featuring low forward voltage (0.90 V at 5 A, 25°C), 120 A surge capability, and 5 mA reverse leakage at 125°C junction temperature. It serves as a high-efficiency output rectifier in DC–DC converters and SMPS secondary-side circuits.

For engineers reviewing the SRS1090 datasheet, SRS1090 pinout, SRS1090 application, or SRS1090 equivalent, key selection criteria include its 90 V repetitive peak reverse voltage, thermal resistance of 2 °C/W (junction-to-case), dual-die configuration, RoHS/halogen-free compliance, and suitability for automated SMT assembly with J-STD-002 solderability.

Technical Context

The SRS1090 employs a dual-die Schottky structure optimized for low conduction loss and fast switching, with a maximum junction temperature of +150°C and thermal resistance R_θJC = 2 °C/W enabling high-power-density layouts. Its guard ring design provides overvoltage protection, and moisture sensitivity level 1 ensures robust reflow compatibility without dry-pack requirements.

Electrical behavior is characterized by a typical forward voltage of 0.90 V at 5 A and 25°C, reverse current ≤100 µA at rated V_RRM and 25°C, and ≤5 mA at 125°C - confirming stable performance across industrial temperature ranges in high-frequency switching topologies.

Key Specifications

Pinout & Package

TO-263AB (D2PAK) package with 3 terminals: Anode 1, Cathode (common), Anode 2 - configured as dual independent Schottky dies sharing a common cathode terminal. Exposed metal tab is electrically connected to cathode and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ090-M3/45 and SB1090, the SRS1090 uniquely offers dual-anode integration in a single TO-263AB footprint - reducing board area and interconnect losses - while maintaining 90 V blocking, 150°C operation, and guard ring protection not found in either alternative.

Availability

SRS1090 is available at Aetrix Electronics and suitable for server VRM output rectification, industrial DC–DC converters, and telecom power shelf designs requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for SRS1090 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 industrial, computing, and communications markets since 1979.

The SRS1090 belongs to TSC's SRS10xx Schottky rectifier family, engineered specifically for high-current, high-frequency switching power supplies where low forward voltage, thermal robustness, and SMT manufacturability are critical.

FAQ

What is the maximum junction temperature rating for the SRS1090?

The SRS1090 has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version N2103). This allows reliable operation in thermally constrained environments such as sealed power modules or high-ambient industrial enclosures. The SRS1090 maintains specified electrical performance up to this limit when thermal design respects the 2 °C/W junction-to-case resistance.

Does the SRS1090 have a guard ring structure, and what benefit does it provide?

Yes, the SRS1090 incorporates a guard ring for overvoltage protection, explicitly listed under FEATURES in the Taiwan Semiconductor documentation. This structure enhances edge termination robustness, improving resistance to transient voltage spikes and localized avalanche breakdown - particularly valuable in unregulated or loosely regulated SMPS outputs where line transients may exceed nominal V_RRM. The SRS1090's guard ring directly contributes to its reliability in telecom and industrial power applications.

Is the SRS1090 suitable for lead-free reflow soldering processes?

Yes, the SRS1090 is qualified for lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is rated at Level 1 per J-STD-020 - meaning it can be stored indefinitely in ambient conditions without baking prior to assembly. This makes the SRS1090 fully compatible with standard Pb-free reflow profiles used in modern electronics manufacturing.

What is the reverse leakage current specification for the SRS1090 at elevated temperature?

At 125°C junction temperature, the SRS1090 exhibits a maximum reverse leakage current (I_R) of 5 mA per diode, as specified in the ELECTRICAL SPECIFICATIONS table. At 25°C and rated V_RRM, leakage is ≤100 µA. These values are confirmed in the official Taiwan Semiconductor datasheet (N2103) and reflect stable performance across the full industrial temperature range - critical for maintaining hold-up time and efficiency in high-temperature DC–DC converters.

How is the dual-die configuration of the SRS1090 implemented electrically?

The SRS1090 integrates two independent Schottky die in a single TO-263AB package, with separate anode terminals (Leads 1 and 3) and a shared cathode terminal (Lead 2 and exposed tab). This configuration enables true dual-path rectification - for example, interleaved outputs or split-rail supplies - without external paralleling. Unlike single-die alternatives, the SRS1090 delivers this functionality in one footprint, reducing PCB area and parasitic inductance compared to discrete solutions.