Taiwan Semiconductor Corporation SR203 R0G

Overview

SR203 R0G from Taiwan Semiconductor is a 2 A, 30 V Schottky barrier rectifier in DO-204AC (DO-15) package, featuring low forward voltage drop (VF ≤ 0.55 V at 2 A, 25°C), high surge current capability (IFSM = 50 A), and AEC-Q101 qualification option. It serves as primary output rectifier in compact DC/DC converters and AC/DC adapters.

For engineers reviewing the SR203 R0G datasheet, SR203 R0G pinout, SR203 R0G application, or SR203 R0G equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 125°C maximum junction temperature, RoHS- and halogen-free compliance, and cathode-band polarity marking for reliable board-level orientation.

Technical Context

This discrete Schottky diode uses a single-die construction with guard ring structure to enhance overvoltage robustness and suppress avalanche-induced failure. Its low VF and high IFSM support high-efficiency, space-constrained power conversion where thermal management is limited.

The device operates across –55°C to +125°C junction range (with optional 150°C rating), exhibits 21.7°C/W junction-to-lead thermal resistance, and maintains IR ≤ 500 µA at 25°C and rated VR - critical for standby leakage control in energy-sensitive designs.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-2EY30 and SB230, SR203 R0G delivers tighter IR control (≤500 µA), AEC-Q101 availability, and halogen-free construction - making it optimal for automotive-adjacent and energy-certified power designs where leakage, reliability, and regulatory alignment are jointly critical.

Availability

SR203 R0G is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial DC/DC modules requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for SR203 R0G 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 discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The SR202–SR220 series was designed to deliver cost-optimized, high-reliability Schottky rectification across 20–200 V ratings, targeting space-constrained, thermally demanding power conversion in consumer, computing, and transportation electronics.

FAQ

What is the maximum junction temperature rating for SR203 R0G?

The SR203 R0G has a maximum junction temperature (TJ) of +125°C under standard operating conditions. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version L2105). The device supports extended operation up to +150°C in AEC-Q101-qualified variants (e.g., SR203H), but SR203 R0G itself is specified for 125°C maximum. Thermal design must ensure junction temperature remains below this limit under worst-case load and ambient conditions.

Does SR203 R0G have AEC-Q101 qualification?

No, SR203 R0G is not AEC-Q101 qualified. The "R0G" suffix denotes RoHS-compliant, halogen-free packaging in DO-15 tape-and-reel format. AEC-Q101 qualification is indicated by the "H" suffix (e.g., SR203H). While SR203 R0G shares identical electrical and thermal specifications with the H-grade part, only SR203H has undergone the full AEC-Q101 stress test suite including temperature cycling, HTRB, and ESD testing required for automotive under-hood use.

What does the "R0G" suffix mean in SR203 R0G?

The "R0G" suffix in SR203 R0G indicates RoHS-compliant (R), green/halogen-free molding compound (0), and tape-and-reel packaging (G). It follows TSC's ordering code convention defined in the datasheet's Ordering Information section (Page 3, Version L2105). This variant is distinct from "A0G" (ammo box) and "H" (AEC-Q101) versions, and confirms compliance with IEC 61249-2-21 for halogen content and JEDEC J-STD-020 for moisture sensitivity level (MSL 1).

What is the reverse leakage current specification for SR203 R0G at 100°C?

At TJ = 100°C and VR = 30 V, the SR203 R0G has a maximum reverse leakage current (IR) of 10 mA, as specified in the Electrical Specifications table (Page 2, Version L2105). This value is measured under pulse conditions (PW = 30 ms) and reflects worst-case thermal drift. At 25°C, IR is limited to 500 µA max - a key differentiator for low-power standby performance in adapter and IoT power designs.

Is SR203 R0G pin-compatible with other devices in the SR202–SR220 family?

Yes, all SR202–SR220 devices, including SR203 R0G, share identical DO-204AC (DO-15) package dimensions, axial lead configuration, and cathode-band polarity marking. They are mechanically interchangeable on PCBs. However, electrical parameters differ - notably VRRM (30 V for SR203 vs. 20 V for SR202 or 40 V for SR204) and VF (0.55 V for SR203 vs. 0.70 V for SR205). Substitution requires verification of voltage margin and thermal derating.