Taiwan Semiconductor Corporation SR302 R0G

Overview

SR302 R0G from Taiwan Semiconductor is a 3A, 20V AEC-Q101-qualified Schottky barrier rectifier in DO-201AD package, featuring 0.55V max forward voltage at 3A and 500µA max reverse leakage at 25°C, optimized for high-efficiency DC/DC converters and automotive-grade power adapters.

For engineers reviewing the SR302 R0G datasheet, SR302 R0G pinout, SR302 R0G application, or SR302 R0G equivalent, key selection factors include its 80A surge rating, 125°C max junction temperature, UL 94V-0 molding compound, pure tin-plated leads per J-STD-002, and cathode-band polarity marking - all critical for thermal reliability and solderability in compact power designs.

Technical Context

The SR302 R0G implements a single-die Schottky structure with guard ring overvoltage protection, enabling fast switching and low conduction loss. Its 10,000 V/µs dv/dt rating supports robust operation in high-frequency SMPS topologies where rapid voltage transients occur.

Thermally, it delivers R_θJA = 50°C/W and R_θJC = 15°C/W, allowing sustained 3A average current under forced-air or moderate PCB copper area conditions. The device operates across –55°C to +125°C junction range, with derating curves confirming usable current down to ambient 100°C.

Key Specifications

Pinout & Package

Package: DO-201AD - Axial leaded, molded plastic case with UL 94V-0 flammability rating, 1.10g mass, cathode indicated by band, 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-3EWH02-M3/54 and SB320-E3/54, the SR302 R0G offers superior thermal performance (50°C/W vs. 55°C/W) and integrated guard ring protection - making it preferred for thermally constrained automotive and industrial designs where long-term reliability under voltage stress is critical.

Availability

SR302 R0G is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS secondary-side rectification, and USB-C PD adapters requiring stable component supply, consistent AEC-Q101 qualification, and traceable green-material compliance.

Supply support for SR302 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, serving global automotive, industrial, and consumer markets since 1979.

The SR302 R0G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability power conversion in space-constrained, thermally demanding environments such as automotive infotainment and ADAS subsystems.

FAQ

What is the maximum junction temperature rating for SR302 R0G?

The SR302 R0G has a maximum junction temperature (T_J) of +125°C, verified per its absolute maximum ratings table. This rating applies under continuous operation with appropriate thermal management - such as a minimum 1.5 cm² 2-oz copper pad - and enables reliable use in sealed automotive enclosures where ambient temperatures reach 85°C. The SR302 R0G datasheet confirms this limit is not extended beyond 125°C even with derating.

Is SR302 R0G AEC-Q101 qualified and what does that cover?

Yes, SR302 R0G is AEC-Q101 qualified, as explicitly stated in its features list and ordering code suffix "H" (though R0G denotes green tape-and-reel packaging). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating suitability for automotive power electronics. The SR302 R0G qualification report includes full test data per AEC-Q101 Rev D requirements.

What is the forward voltage specification for SR302 R0G at full rated current?

The SR302 R0G specifies a maximum forward voltage (V_F) of 0.55 V at I_F = 3 A and T_J = 25°C, measured under pulse conditions (PW = 0.3 ms). At elevated junction temperatures (e.g., 100°C), V_F decreases slightly due to Schottky physics, remaining below 0.52 V - a key advantage confirmed in the SR302 R0G electrical specifications table.

Does SR302 R0G have a guard ring, and why is it important?

Yes, the SR302 R0G incorporates a guard ring structure, explicitly listed under FEATURES. This design enhances edge termination robustness, improving actual reverse breakdown margin beyond the rated 20 V V_RRM and increasing immunity to localized electric field crowding during transient overvoltage events - a critical reliability feature for automotive and industrial power supplies subject to load dump or inductive switching spikes.

What packaging and plating does SR302 R0G use, and is it lead-free?

The SR302 R0G uses DO-201AD packaging with pure tin-plated leads, fully compliant with J-STD-002 for solderability and RoHS Directive 2011/65/EU. It is halogen-free per IEC 61249-2-21 and carries the "G" suffix in its marking (as in R0G) indicating green compound. No lead or lead compounds are present - the SR302 R0G meets all applicable lead-free and environmental compliance requirements for global electronics manufacturing.