Taiwan Semiconductor Corporation SR2020PT

Overview

SR2020PT from Taiwan Semiconductor is a 20A, 20V repetitive peak reverse voltage Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 10A/25°C, 200A surge capability, and AEC-Q101 qualification option. It serves as primary output rectifier in high-efficiency SMPS for consumer power adapters and flat-panel TV power stages.

For engineers reviewing the SR2020PT datasheet, SR2020PT pinout, SR2020PT application, or SR2020PT equivalent, key selection criteria include its low VF at rated current, 1.5°C/W junction-to-case thermal resistance, dual-die configuration, and UL Recognized status (E-326243) for safety-critical AC/DC designs.

Technical Context

The SR2020PT employs a dual-die Schottky structure optimized for low conduction loss in continuous forward-biased operation. Its 20V VRRM rating targets secondary-side rectification where low forward drop and fast recovery are prioritized over high-voltage blocking.

Thermal performance is defined by R_θJC = 1.5°C/W and maximum junction temperature of 125°C (derated to 150°C in some variants), with mounting torque limited to 1.13 N·m to ensure mechanical reliability under thermal cycling in high-power applications.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - Industry-standard 3-terminal through-hole power package with isolated tab, matte tin-plated leads compliant with J-STD-002, and UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ020-M3/45 and MBR2020CT, the SR2020PT delivers superior thermal management via TO-247AD packaging, mandatory UL recognition for Class II adapters, and optional AEC-Q101 qualification-making it the preferred choice for safety- and reliability-critical 20V rectification.

Availability

SR2020PT is available at Aetrix Electronics and suitable for power adapters, flat-panel TVs, and industrial SMPS requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for SR2020PT 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global power supply and automotive electronics markets since 1979.

The SR series Schottky rectifiers are engineered for high-efficiency, high-reliability secondary-side rectification in AC/DC and DC/DC converters, emphasizing low VF, robust surge handling, and safety-compliant packaging.

FAQ

What is the maximum junction temperature rating for SR2020PT?

The SR2020PT has a maximum junction temperature (T_J) of 125°C under standard operating conditions. This rating is confirmed in the Absolute Maximum Ratings table of the J2103 datasheet. Operating the SR2020PT above this temperature risks permanent degradation of the Schottky junction. Derating curves in the datasheet define allowable current reduction as case temperature increases, ensuring safe operation within the SR2020PT thermal envelope.

Is SR2020PT pin-compatible with other parts in the SR20xxPT family?

No, SR2020PT is not pin-compatible with higher-voltage variants like SR2060PT or SR20150PT in functional terms, though all share the same TO-247AD (TO-3P) mechanical footprint and terminal arrangement. Electrical differences-including VRRM, VF, and IR-are significant across the family, so substituting SR2020PT for a higher-voltage part may cause catastrophic failure under reverse bias. Always verify voltage margin and thermal design for each specific SR20xxPT variant.

Does SR2020PT require a heatsink in typical 20A operation?

Yes, SR2020PT requires a heatsink in continuous 20A operation. With R_θJC = 1.5°C/W and P_D ≈ 11W (at VF = 0.55V), even modest ambient temperatures exceed safe junction limits without thermal management. The TO-247AD tab is designed for direct heatsink mounting; omitting a heatsink or using inadequate thermal interface material will cause SR2020PT junction temperature to exceed 125°C rapidly.

What does the "PT" suffix indicate in SR2020PT?

The "PT" suffix in SR2020PT denotes Taiwan Semiconductor's standard plastic TO-247AD (TO-3P) package with matte tin-plated leads, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. It distinguishes this variant from "PTH", which indicates AEC-Q101 qualification. The SR2020PT is the base industrial-grade version; SR2020PTH would be the automotive-qualified counterpart.

How is reverse leakage (IR) specified for SR2020PT at elevated temperature?

For SR2020PT, reverse leakage current (IR) is specified as 15 mA maximum per diode at T_J = 100°C and rated VRRM. This value is measured under pulse test conditions (PW = 30 ms) and reflects realistic worst-case behavior in thermally stressed operation. At 125°C, IR is not explicitly bounded in the datasheet, but extrapolation from curve data shows values remain below 25 mA-critical for maintaining low standby power in energy-efficient adapters using SR2020PT.