Taiwan Semiconductor Corporation SR003 B0G

Overview

SR003 B0G from Taiwan Semiconductor is a 0.5A, 30V repetitive peak reverse voltage Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.55 V at 0.5 A, 25°C), high surge current capability (30 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in compact DC/DC converters.

For engineers reviewing the SR003 B0G datasheet, SR003 B0G pinout, SR003 B0G application, or SR003 B0G equivalent, key selection criteria include its 30 V V_RRM, 0.55 V forward voltage at rated current, 500 µA reverse leakage at 25°C, junction-to-ambient thermal resistance of 50 °C/W, and DO-41 mechanical compatibility with legacy through-hole power designs.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring structure for overvoltage protection and pure tin-plated leads compliant with J-STD-002 solderability. Its 30 V V_RRM and 0.55 V V_F balance efficiency and breakdown margin for low-voltage secondary-side rectification.

Thermal performance is defined by R_θJA = 50 °C/W and maximum junction temperature of +150°C, enabling operation in ambient temperatures up to +85°C at full 0.5 A DC current with standard PCB copper area. Reverse leakage remains ≤500 µA at 25°C and ≤10 mA at 100°C.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial lead, epoxy-molded case with cathode band marking. RoHS-compliant, halogen-free, UL 94V-0 rated molding compound. Weight ≈ 0.330 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-2EJH03-M3/54 and SB0530, SR003 B0G delivers superior thermal margin (+150°C), lower forward voltage, and higher surge rating-critical for compact, high-reliability power supplies where derating headroom directly impacts lifetime and field failure rates.

Availability

SR003 B0G is available at Aetrix Electronics and suitable for USB-C power adapters, industrial 24 V DC/DC converters, and automotive body control modules requiring stable component supply, consistent DO-41 form factor, and AEC-Q101 qualification path.

Supply support for SR003 B0G 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, MOSFETs, and TVS diodes, with global distribution and AEC-Q101 validation capability.

The SR002–SR010 family was designed specifically for cost-sensitive, high-volume power conversion applications demanding reliability, low forward voltage, and standardized DO-41 packaging across 20–100 V ratings.

FAQ

What is the maximum junction temperature rating for SR003 B0G?

The SR003 B0G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the H2104 datasheet. This allows sustained operation at full 0.5 A current in ambient temperatures up to +85°C with standard PCB copper area. The SR003 B0G's thermal design must account for its 50 °C/W junction-to-ambient resistance to avoid exceeding this limit.

Does SR003 B0G have AEC-Q101 qualification?

The SR003 B0G itself is not AEC-Q101 qualified; however, the SR003H variant (same electrical specs, marked "H") is AEC-Q101 qualified. The "B0G" suffix indicates green compound and ammo box packaging-not qualification status. Engineers requiring automotive-grade reliability should specify SR003H instead of SR003 B0G, as the SR003 B0G part number does not carry the AEC-Q101 certification.

What is the reverse leakage current specification for SR003 B0G at 100°C?

At 100°C junction temperature and rated 30 V reverse voltage, the SR003 B0G exhibits a maximum reverse leakage current (I_R) of 10 mA, as specified in the electrical characteristics table. This value is critical for standby power budgeting in always-on systems. The SR003 B0G's leakage increases significantly above 25°C, so thermal management directly impacts system quiescent current.

Is SR003 B0G compatible with lead-free reflow soldering processes?

Yes, the SR003 B0G features pure tin-plated leads qualified per J-STD-002 for solderability, and its DO-41 package is rated for lead-free reflow profiles with peak temperatures up to 260°C. The epoxy molding compound meets UL 94V-0 flammability requirements and is halogen-free per IEC 61249-2-21, making it fully compliant with modern RoHS and JEDEC J-STD-020 moisture sensitivity level (MSL) Class 1 handling.

How does the junction capacitance of SR003 B0G affect high-frequency switching performance?

The SR003 B0G has a typical junction capacitance (C_J) of 110 pF at 1 MHz and 4 V reverse bias. This capacitance contributes to switching node ringing and EMI in high-frequency (>100 kHz) flyback or LLC converters. Designers must account for it during snubber design and layout-especially near gate drivers-since the SR003 B0G's C_J is ~35% higher than that of the SR009/SR010 variants, impacting noise filtering requirements.