Taiwan Semiconductor Corporation SR003 R0G

Overview

SR003 R0G 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 (max 0.55 V at 0.5 A, 25°C), 30 A surge capability, and AEC-Q101 qualification for automotive-grade reliability. It serves as a primary output rectifier in compact DC-DC converters.

For engineers reviewing the SR003 R0G datasheet, SR003 R0G pinout, SR003 R0G application, or SR003 R0G equivalent, key selection criteria include its 30 V V_RRM, 0.55 V V_F max, 500 µA I_R max at 25°C, junction temperature range up to +150°C, and DO-41 mechanical compatibility with standard through-hole power supply layouts.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring protection to withstand transient overvoltage events. Its low V_F and high I_FSM (30 A) enable efficient operation in high-frequency switching topologies where conduction loss minimization is critical.

The device exhibits a typical junction capacitance of 110 pF at 4.0 V reverse bias and 1 MHz, supporting fast switching transitions. Thermal resistance R_θJA is 50°C/W, enabling stable operation at full rated current under natural convection in standard PCB footprints.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, cathode indicated by band. Lead finish: pure tin, J-STD-002 solderable. 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 R0G uniquely combines AEC-Q101 qualification, +150°C operation, and 30 A surge rating-making it the only option validated for automotive BCM and medical portable charger designs requiring extended thermal and transient resilience.

Availability

SR003 R0G is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power adapters, and industrial IoT sensor node power supplies requiring stable component supply across multi-year production cycles.

Supply support for SR003 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 devices, and MOSFETs for industrial and automotive markets.

The SR002–SR010 series was designed specifically for high-reliability, low-loss secondary-side rectification in compact, high-frequency switching power supplies targeting automotive, medical, and industrial end equipment.

FAQ

What is the maximum junction temperature rating for SR003 R0G?

The SR003 R0G has a maximum junction temperature (T_J) rating of +150°C, verified per AEC-Q101 stress testing. This allows uninterrupted operation in under-hood automotive environments and sealed industrial enclosures where ambient temperatures exceed 85°C. The SR003 R0G maintains full 0.5 A current capability up to this limit when mounted on standard FR-4 PCB with 1-inch² copper pour.

Is SR003 R0G pin-compatible with other parts in the SR002–SR010 family?

Yes, all SR002–SR010 variants-including SR003 R0G-share identical DO-204AL (DO-41) package dimensions, lead spacing, and axial pinout. This enables direct substitution within the same voltage grade during design iteration or BOM optimization, provided forward voltage and leakage requirements remain aligned with the application's thermal and efficiency targets. The SR003 R0G marking code 'SR003' is laser-etched on the cathode-banded body.

Does SR003 R0G meet automotive qualification standards?

Yes, SR003 R0G is AEC-Q101 qualified, as confirmed in Taiwan Semiconductor's H2104 datasheet revision. This includes temperature cycling, high-temperature operating life, and unbiased highly accelerated stress test (uHAST) validation. The 'R0G' suffix denotes green (halogen-free) packaging and AEC-Q101 compliance. SR003 R0G is approved for use in automotive body electronics, infotainment power rails, and ADAS auxiliary supplies.

What is the typical forward voltage of SR003 R0G at 0.5 A and 100°C junction temperature?

The SR003 R0G datasheet specifies V_F ≤ 0.55 V at 0.5 A and 25°C; at 100°C, V_F decreases to approximately 0.47 V due to the negative temperature coefficient of Schottky diodes. This reduction improves conduction efficiency in thermally stressed conditions. The SR003 R0G maintains this behavior across its full operating range without degradation, as verified in Fig.4 Typical Forward Characteristics.

How does the guard ring feature in SR003 R0G improve system reliability?

The guard ring in SR003 R0G is a diffused P-type region surrounding the active Schottky junction, which redistributes electric field lines during voltage transients and prevents edge-initiated avalanche breakdown. This extends the device's effective surge tolerance beyond its rated 30 A I_FSM, particularly in unclamped inductive switching events. In real-world SMPS designs, this feature reduces field failure rates linked to line transients-making SR003 R0G especially valuable in SR003 R0G-based automotive and medical power supplies.