Taiwan Semiconductor Corporation SR205 A0G

Overview

SR205 A0G from Taiwan Semiconductor is a 2 A, 50 V Schottky barrier rectifier in DO-204AC (DO-15) package, featuring low forward voltage drop (VF ≤ 0.70 V at 2 A, 25°C), high surge current capability (IFSM = 50 A), and junction temperature rating up to +150°C. It is used in DC-DC converters and AC/DC adapters requiring efficient unidirectional power conversion.

For engineers reviewing the SR205 A0G datasheet, SR205 A0G pinout, SR205 A0G application, or SR205 A0G equivalent, key selection criteria include its 50 V repetitive peak reverse voltage (VRRM), 2 A average forward current (IF), thermal resistance (RθJL = 21.7°C/W), AEC-Q101 qualification option (via H-suffix variants), and DO-15 mechanical compatibility.

Technical Context

This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and cathode-band polarity marking. Its guard ring structure provides overvoltage protection, while pure tin-plated leads ensure solderability per J-STD-002 and pass JESD201 Class 2 whisker testing.

Designed for high-efficiency switching applications, it delivers low conduction loss (VF ≤ 0.70 V) and supports rapid recovery with dv/dt rating of 10,000 V/µs. Thermal performance is characterized by RθJA = 75.0°C/W and RθJC = 14.0°C/W, enabling reliable operation under continuous 2 A load at ambient temperatures up to +75°C.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, epoxy-molded case meeting UL 94V-0 flammability rating. Cathode indicated by band on body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-2EY50 and SB250, SR205 A0G offers halogen-free construction and optional AEC-Q101 qualification-critical for automotive and green-certified industrial designs-while maintaining identical DO-15 footprint and thermal performance.

Availability

SR205 A0G is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and AC adapters requiring stable component supply with consistent DO-15 mechanical form factor and 2 A/50 V electrical performance.

Supply support for SR205 A0G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs.

The SR202–SR220 series was developed to deliver high-reliability, low-loss Schottky rectifiers for compact, high-efficiency power conversion in automotive, industrial, and consumer applications.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) for SR205 A0G?

The SR205 A0G has a VRRM of 50 V, meaning it can block up to 50 V of reverse voltage continuously without breakdown. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version L2105), and applies across the full operating temperature range from −55°C to +150°C. Designers must maintain at least 20% derating margin in high-noise or transient-prone circuits.

Does SR205 A0G have AEC-Q101 qualification?

The SR205 A0G itself is not AEC-Q101 qualified; however, the SR205H and SR205HA0G variants are explicitly listed as AEC-Q101 qualified in TSC's Ordering Information table. The "H" suffix denotes qualification, while "A0G" indicates ammo box packaging. For automotive applications requiring AEC-Q101, SR205HA0G is the compliant version of SR205 A0G.

What is the forward voltage (VF) specification for SR205 A0G at rated current?

SR205 A0G has a maximum forward voltage of 0.70 V at IF = 2 A and TJ = 25°C, per the Electrical Specifications table. At higher junction temperatures (e.g., 100°C), VF decreases slightly due to Schottky physics, but the datasheet specifies 0.70 V as the upper limit under nominal conditions. Pulse testing uses 0.3 ms width to avoid self-heating effects.

What package type does SR205 A0G use, and what are its key mechanical features?

SR205 A0G uses the DO-204AC (DO-15) axial package with pure tin-plated leads compliant with J-STD-002 solderability standards. It features UL 94V-0 flammability-rated epoxy molding, cathode polarity marked by a band, and weighs approximately 0.400 g. The package supports manual and automated assembly, including wave and reflow soldering.

How does the guard ring in SR205 A0G improve reliability?

The guard ring in SR205 A0G enhances edge termination robustness, suppressing premature avalanche breakdown at the die periphery under high dv/dt or transient overvoltage conditions. This structure allows the device to sustain 10,000 V/µs critical rate of rise without failure, improving immunity to line transients in SMPS and adapter applications where fast-switching FETs generate steep voltage edges.