Taiwan Semiconductor Corporation SR3020PTH

Overview

SR3020PTH from Taiwan Semiconductor is a 30A, 20V AEC-Q101-qualified Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 15A/25°C, 300A surge capability, and junction-to-case thermal resistance of 1.5°C/W. It serves as a primary output rectifier in high-efficiency SMPS for automotive-grade power adapters and DC-DC converters.

For engineers reviewing the SR3020PTH datasheet, SR3020PTH pinout, SR3020PTH application, or SR3020PTH equivalent, key selection criteria include its AEC-Q101 qualification, low VF at rated current, dual-die construction, 125°C max junction temperature, and UL recognition under file E-326243 - all critical for automotive and industrial power supply designs requiring reliability and thermal performance.

Technical Context

This device implements a dual-die Schottky structure in a single TO-247AD package, enabling parallel conduction paths with shared thermal mass. Its guard ring design provides overvoltage protection, while matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.

The SR3020PTH operates with a maximum junction temperature of 125°C (derated above 25°C ambient), supported by a low R_θJC of 1.5°C/W. Reverse leakage remains ≤1000 µA at 25°C and ≤20 mA at 100°C under rated V_RRM, ensuring stable blocking in high-temperature switching environments.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - 3-terminal through-hole package with isolated mounting tab, UL 94V-0 molding compound, and 6.10g mass. Mounting torque ≤1.13 N·m; polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH02-M3 and MUR3020CTG, the SR3020PTH uniquely combines AEC-Q101 qualification, low 0.55V forward drop, and TO-247AD thermal performance - making it the only option among the three validated for automotive-grade 20V output rectification with minimal thermal derating.

Availability

SR3020PTH is available at Aetrix Electronics and suitable for automotive power adapters, industrial DC-DC converters, and monitor power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SR3020PTH 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 SR30xPTH series belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability automotive and industrial power conversion where low forward voltage, surge robustness, and thermal stability are mandatory.

FAQ

What is the maximum junction temperature rating for SR3020PTH?

The SR3020PTH has a maximum junction temperature (T_J) rating of 125°C, as specified in the Absolute Maximum Ratings table. This value applies under continuous operation with proper heatsinking and case temperature control. Derating curves in the datasheet define allowable current reduction above 25°C ambient, and the device must not exceed 125°C at the die level during operation. The SR3020PTH is not rated for 150°C operation - that specification applies only to higher-voltage variants like SR30150PTH.

Is SR3020PTH pin-compatible with other parts in the SR30xPT family?

Yes, all SR30xPT and SR30xPTH parts share identical TO-247AD (TO-3P) mechanical footprint, pin assignment, and terminal configuration - Anode (Lead 1), Cathode (Lead 2), and electrically connected tab. Voltage rating differences (20V to 150V) do not affect physical compatibility, enabling board-level substitution during design iteration or voltage-scaling upgrades - provided thermal and electrical margins remain valid for the new V_RRM.

Does SR3020PTH require a heatsink in typical 30A applications?

Yes, the SR3020PTH requires an external heatsink in continuous 30A operation. With R_θJC = 1.5°C/W and typical power dissipation of ~16.5W (30A × 0.55V), even modest ambient temperatures demand thermal resistance ≤1.5°C/W from junction to ambient - achievable only with a properly sized heatsink and thermal interface material. Without heatsinking, the device exceeds 125°C junction limit within seconds at full load.

What does the "H" suffix in SR3020PTH signify?

The "H" suffix in SR3020PTH explicitly denotes AEC-Q101 qualification per the Ordering Information section of the datasheet. It distinguishes this variant from the non-automotive SR3020PT version. Both share identical electrical and thermal specifications, but only SR3020PTH has undergone the full AEC-Q101 stress test suite - including HTGB, TC, HTRB, and ESD - and is approved for use in automotive power systems.

How does the guard ring feature improve reliability in SR3020PTH?

The guard ring in SR3020PTH is a diffusion-based edge termination structure that redistributes electric field lines away from the active junction periphery. This prevents premature avalanche breakdown at the die edge during voltage transients, increasing the device's effective V_RRM margin and improving long-term stability under repetitive surge conditions - especially critical in automotive 12V systems exposed to load dump events up to ±120V.