Taiwan Semiconductor Corporation SRF1020

Overview

SRF1020 from Taiwan Semiconductor is a 10A, 20V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AB package, featuring 0.55V max forward voltage at 5A/25°C, 120A surge capability, and AEC-Q101 qualification option (SRF1020H). It delivers low power loss in high-efficiency SMPS and DC-DC converters for automotive and industrial power supplies.

For engineers reviewing the SRF1020 datasheet, SRF1020 pinout, SRF1020 application, or SRF1020 equivalent, key selection criteria include its 20V V_RRM, dual-die configuration, 3.5°C/W junction-to-case thermal resistance, TJ = –55°C to +125°C rating, and UL Recognized File #E-326243 compliance.

Technical Context

The SRF1020 is a single-die Schottky rectifier (not dual-die - per marking diagram and absolute max table, SRF1020 is the base 20V variant; "dual dies" applies only to higher-voltage variants like SRF10100+ per context in KEY PARAMETERS section). Its guard ring structure provides overvoltage protection, and matte tin-plated leads meet J-STD-002 solderability standards.

It operates with a maximum junction temperature of +125°C (not +150°C - that rating applies only to SRF1030 and above per Absolute Maximum Ratings table), and exhibits 500µA max reverse leakage at 25°C and rated VR, rising to 15mA at 100°C.

Key Specifications

Pinout & Package

Package: ITO-220AB - insulated TO-220 variant with internal isolation between collector (case) and emitter terminals; 1.70g weight; UL 94V-0 molding compound; polarity marked 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 and SB1020, the SRF1020 offers superior thermal performance (3.5°C/W), UL recognition, and an AEC-Q101-qualified variant - making it optimal for space-constrained, safety-certified, or automotive-grade power supplies where isolation and reliability are prioritized.

Availability

SRF1020 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, long-term lifecycle support, and traceable sourcing.

Supply support for SRF1020 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 power electronics markets since 1979.

The SRF1020 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, low-V_F operation in 12–48V power conversion systems where thermal management and reliability under surge conditions are critical.

FAQ

What is the maximum junction temperature rating for the SRF1020?

The SRF1020 has a maximum junction temperature (T_J) rating of +125°C, as specified in the Absolute Maximum Ratings table. This differs from higher-voltage variants (e.g., SRF1030+) which support up to +150°C. Designers must apply appropriate derating curves - especially above 85°C ambient - to ensure the SRF1020 remains within this limit under full 10A load.

Is the SRF1020 electrically isolated between case and terminals?

Yes, the SRF1020 uses the ITO-220AB package, where the metal tab (case) is electrically isolated from both anode and cathode leads. This allows direct mounting to a common heatsink without requiring insulating pads or hardware - a key advantage over standard TO-220AC packages. The isolation voltage rating is not explicitly stated in the datasheet but conforms to ITO-220AB industry standards.

Does the SRF1020 have AEC-Q101 qualification?

The base SRF1020 is not AEC-Q101 qualified, but the SRF1020H variant is explicitly listed as AEC-Q101 qualified in the Ordering Information section. The "H" suffix denotes automotive-grade screening and testing. For automotive applications, specify SRF1020H to ensure compliance with AEC-Q101 stress test requirements including temperature cycling, HTRB, and ESD.

What is the forward voltage specification for the SRF1020 at 10A?

The datasheet specifies V_F only at 5A (≤0.55V, T_J = 25°C); no guaranteed max value is given at 10A. However, typical curves (Fig.4) show ~0.68V at 10A/25°C. Designers should use the 5A spec for worst-case loss calculation or consult TSC's application engineering for 10A characterization data - especially for thermal modeling at full rated current.

How does the SRF1020 compare to the SRF1030 in terms of reverse leakage?

At 25°C and rated V_RRM, both SRF1020 and SRF1030 share the same max reverse current specification: ≤500 µA. However, at 100°C, the SRF1020's I_R rises to ≤15 mA, while the SRF1030 (and all ≥30V variants) is rated ≤10 mA - indicating better high-temperature leakage control in higher-voltage Schottky structures due to process optimization.