Taiwan Semiconductor Corporation SRAF1020

Overview

SRAF1020 from Taiwan Semiconductor is a 10A, 20V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.55V typical forward voltage at 10A/25°C, 200A surge current capability, and AEC-Q101 qualification option (SRAF1020H). It serves as a high-efficiency output rectifier in low-voltage DC-DC converters.

For engineers reviewing the SRAF1020 datasheet, SRAF1020 pinout, SRAF1020 application, or SRAF1020 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (4°C/W junction-to-case), surge rating, and automotive-grade reliability validation where required.

Technical Context

The SRAF1020 uses a single-die Schottky structure with guard ring over-voltage protection, enabling fast switching and low conduction loss. Its 10,000 V/µs critical dv/dt rating supports stable operation in high-frequency SMPS topologies.

Thermally, it delivers 4°C/W junction-to-case resistance and operates up to 125°C junction temperature (150°C for storage), with matte tin-plated leads compliant to J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, and polarity marking per 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 and SB1020, the SRAF1020 offers electrically isolated tab (ITO-220AC), UL recognition, and higher surge tolerance-making it preferable for safety-critical or thermally constrained designs where tab isolation simplifies mechanical integration.

Availability

SRAF1020 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial PLC power rails requiring stable component supply, automotive-grade variants (SRAF1020H), and UL-recognized discrete rectifiers.

Supply support for SRAF1020 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 industrial, computing, and consumer markets since 1979.

The SRAF series targets high-efficiency, high-reliability power conversion applications, with design emphasis on low VF, robust surge handling, and qualification-ready variants for automotive and regulated end equipment.

FAQ

What is the maximum junction temperature for the SRAF1020?

The SRAF1020 has a maximum junction temperature (TJ max) of 125°C under continuous operation. This rating applies across its full current range and defines the upper thermal limit for reliable long-term performance. Exceeding 125°C risks accelerated degradation of the Schottky junction. Derating curves in the datasheet specify reduced current capability above 25°C ambient to maintain this TJ limit. The SRAF1020 must be mounted with appropriate heatsinking to ensure the junction stays within this bound during operation.

Does the SRAF1020 have an electrically isolated tab?

Yes, the SRAF1020 uses the ITO-220AC package, which features an electrically isolated metal tab. Unlike standard TO-220AC devices, the tab is not internally connected to any terminal-providing galvanic isolation between the heatsink and the circuit. This eliminates the need for insulating pads or shoulder washers in many designs. The isolation is verified per package specifications and supports safe mounting directly to grounded chassis or shared thermal planes without short-circuit risk.

What is the forward voltage specification for the SRAF1020 at 10 A?

The SRAF1020 has a typical forward voltage (VF) of 0.55 V at 10 A and 25°C junction temperature, measured under pulsed conditions (PW = 0.3 ms). This value is confirmed in the Electrical Specifications table and represents the dominant conduction loss contributor. At higher temperatures (e.g., 100°C), VF decreases slightly due to Schottky diode physics, but system-level losses remain dominated by this 0.55 V baseline at nominal operating conditions.

Is the SRAF1020 RoHS and halogen-free compliant?

Yes, the SRAF1020 is RoHS compliant and halogen-free in accordance with IEC 61249-2-21. These compliance statements are explicitly documented in the FEATURES section of the official datasheet. The molding compound, lead finish (matte tin), and internal materials meet both regulatory requirements, supporting environmentally restricted markets and facilitating end-product compliance reporting without additional material declarations.

What does the "H" suffix mean in SRAF1020H?

The "H" suffix in SRAF1020H denotes AEC-Q101 qualification. This variant undergoes additional stress testing-including temperature cycling, highly accelerated life testing (HALT), and ESD validation-to meet automotive-grade reliability standards. While the base SRAF1020 meets industrial specs, the SRAF1020H is specifically intended for automotive body electronics, infotainment power supplies, and other non-safety-critical vehicle systems requiring certified component robustness.