Taiwan Semiconductor Corporation SRF2020

Overview

SRF2020 from Taiwan Semiconductor is a 20A, 20V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AB package, featuring 0.55V max forward voltage at 10A/25°C, 200A surge capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters and AC-DC adapters.

For engineers reviewing the SRF2020 datasheet, SRF2020 pinout, SRF2020 application, or SRF2020 equivalent, key selection criteria include its 20V V_RRM, 1.5°C/W junction-to-case thermal resistance, dual-die configuration, UL Recognized status (E-326243), and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

The SRF2020 employs a dual-die Schottky structure optimized for low forward voltage drop and fast switching with no reverse recovery charge. Its guard ring design enhances overvoltage ruggedness, while the ITO-220AB package enables direct heatsink mounting with 0.56 N·m max torque.

Thermal performance is defined by R_θJC = 1.5°C/W and a maximum junction temperature of +125°C (derated above 25°C ambient). Reverse leakage remains ≤500 µA at 25°C and ≤15 mA at 100°C under rated 20V reverse bias.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, matte tin-plated leads, and 1.70g mass. Designed for mechanical mounting via M3 screw (0.56 N·m max torque) and thermal interface to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ020TRPBF and SB2020-E3/45, the SRF2020 offers electrically isolated tab mounting, AEC-Q101 qualification path, and tighter thermal resistance-making it preferred for space-constrained, thermally demanding, or automotive-grade designs where mounting safety and long-term reliability are prioritized.

Availability

SRF2020 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial 24V DC-DC converters requiring stable component supply across multi-year production cycles.

Supply support for SRF2020 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power and automotive markets since 1979.

The SRF2020 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, low-voltage secondary-side rectification in compact, thermally constrained power supplies.

FAQ

What is the maximum junction temperature rating for the SRF2020?

The SRF2020 has a maximum junction temperature (T_JMAX) of +125°C, with storage temperature rated from –55°C to +150°C. This rating applies to the standard version; derating curves in the datasheet define allowable forward current versus ambient temperature and heatsink conditions. Thermal design must respect R_θJC = 1.5°C/W and ensure junction temperature stays within this limit during worst-case operation. The SRF2020 is not rated for 150°C operation-only higher-voltage variants like SRF20150 specify +150°C T_JMAX.

Does the SRF2020 have an AEC-Q101 qualified version?

Yes-the SRF2020H is the AEC-Q101 qualified variant of the SRF2020, indicated by the "H" suffix in the ordering code. It undergoes accelerated stress testing per AEC-Q101 Rev D, including HTGB, HTRB, and temperature cycling, making it suitable for automotive body electronics and infotainment systems. The SRF2020H shares identical electrical and thermal specifications with the standard SRF2020 but adds automotive reliability validation and traceability documentation.

What is the forward voltage specification for the SRF2020 at rated current?

The SRF2020 has a maximum forward voltage (V_F) of 0.55 V at I_F = 10 A and T_J = 25°C, measured under pulsed conditions (PW = 0.3 ms). At full 20A average current and elevated junction temperature, V_F increases-typical values reach ~0.62 V at 25°C and ~0.75 V at 100°C. This low V_F directly reduces conduction losses in high-current, low-voltage output stages where efficiency and thermal management are critical.

How is the ITO-220AB package different from standard TO-220AB?

The ITO-220AB package used by the SRF2020 features an electrically insulated metal tab, unlike standard TO-220AB which has a conductive tab tied to the cathode. This insulation eliminates need for isolating washers when mounting to grounded heatsinks, simplifying mechanical design and improving thermal reliability. The ITO-220AB also meets UL 94V-0 flammability rating and uses matte tin-plated leads compliant with J-STD-002 solderability standards-key distinctions confirmed in TSC's mechanical data sheet for the SRF2020.

What is the reverse leakage current behavior of the SRF2020 across temperature?

The SRF2020 exhibits ≤500 µA reverse leakage (I_R) at 20V reverse bias and 25°C, rising to ≤15 mA at 100°C and ≤5 mA at 125°C. These values are measured under 30 ms pulse conditions per datasheet Note 2. Leakage remains well-controlled up to T_J = 125°C, supporting stable operation in thermally aggressive environments such as enclosed industrial power supplies. The SRF2020 does not specify I_R at 125°C for all voltage grades-only the 20V–60V group (including SRF2020) provides that data point.