Taiwan Semiconductor Corporation SRA1020

Overview

SRA1020 from Taiwan Semiconductor is a 10A, 20V repetitive peak reverse voltage Schottky barrier rectifier in TO-220AC package, featuring 0.55V forward voltage at 10A/25°C, 170A surge capability, and AEC-Q101 qualification option (SRA1020H). It serves as a primary output rectifier in high-efficiency 20V-input SMPS and DC-DC converters for industrial power supplies.

For engineers reviewing the SRA1020 datasheet, SRA1020 pinout, SRA1020 application, or SRA1020 equivalent, key selection criteria include its low VF at rated current, 2°C/W junction-to-case thermal resistance, TJ max of 125°C (standard) or 150°C (AEC-Q101 version), and compatibility with lead-free reflow per J-STD-002.

Technical Context

The SRA1020 uses a single-die Schottky structure optimized for low conduction loss in medium-voltage switching applications. Its 20V VRRM rating targets secondary-side rectification in compact 12–24V input systems, where forward voltage directly impacts system efficiency under 10A continuous load.

Thermal performance is defined by RθJC = 2°C/W and maximum junction temperature limits of –55°C to +125°C (standard) or +150°C (AEC-Q101 variant), enabling direct heatsink mounting without thermal interface material in many 10A designs.

Key Specifications

Pinout & Package

Package: TO-220AC - Insulated case with single mounting hole, matte tin-plated leads, UL 94V-0 molding compound, and polarity marking on device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ020-M3/45 and SB1020, the SRA1020 offers tighter VF control (0.55V), lower thermal resistance (2°C/W), and an AEC-Q101-qualified variant - making it preferable for space-constrained, thermally demanding, or automotive-grade 20V rectification.

Availability

SRA1020 is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and industrial adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SRA1020 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 since 1979.

The SRA1020 belongs to TSC's high-current Schottky rectifier product line, engineered for efficiency-critical secondary-side rectification in compact, high-frequency SMPS used across industrial, computing, and automotive power systems.

FAQ

What is the maximum junction temperature rating for the standard SRA1020?

The standard SRA1020 has a maximum junction temperature (TJ max) of +125°C, specified over the storage temperature range of –55°C to +150°C. This rating applies to non-AEC-Q101 versions and defines the upper thermal limit for reliable operation under continuous 10A forward current with appropriate heatsinking. The SRA1020H variant extends TJ max to +150°C for automotive applications.

Is the SRA1020 pin-compatible with other TO-220AC Schottky rectifiers?

Yes, the SRA1020 uses the industry-standard TO-220AC package with anode, cathode, and electrically connected tab configuration - identical pinout to VS-10BQ020-M3/45, SB1020, and MBR1020CT. Mechanical mounting and PCB footprint are interchangeable, though thermal and electrical performance differences require layout review for high-power designs.

Does the SRA1020 have a guard ring, and what is its function?

Yes, the SRA1020 incorporates a guard ring structure in its die design. This feature improves edge termination robustness by distributing electric field stress away from the active junction periphery, significantly enhancing resistance to transient overvoltage events and preventing premature avalanche breakdown during voltage spikes in switching circuits.

What is the reverse leakage current specification for the SRA1020 at 100°C?

At TJ = 100°C and rated VR = 20V, the SRA1020 exhibits a maximum reverse current (IR) of 15 mA. This value is confirmed in the Electrical Specifications table and reflects typical thermal runaway behavior of Schottky devices - critical for evaluating standby power loss and thermal stability in high-ambient environments.

How does the SRA1020's 2°C/W junction-to-case thermal resistance impact heatsink selection?

The SRA1020's RθJC of 2°C/W allows direct calculation of case temperature rise: ΔTC = Pd × 2. For example, at 5.5W conduction loss (10A × 0.55V), case temperature rises 11°C above heatsink base. This low value simplifies thermal design - enabling use of smaller extruded aluminum heatsinks or even PCB copper planes in moderate-power applications.