Taiwan Semiconductor Corporation SR4030PTH

Overview

SR4030PTH from Taiwan Semiconductor is a 40A, 30V AEC-Q101-qualified Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 20A/25°C, 400A surge capability, and guard ring overvoltage protection-used in automotive-grade DC-DC converters and SMPS secondary-side rectification.

For engineers reviewing the SR4030PTH datasheet, SR4030PTH pinout, SR4030PTH application, or SR4030PTH equivalent, key selection factors include its AEC-Q101 qualification, dual-die thermal performance (R_θJC = 1.2°C/W), 30V V_RRM, and UL Recognized File # E-326243 compliance for high-reliability power conversion designs.

Technical Context

This device implements a dual-die Schottky structure with guard ring termination to sustain transient overvoltage events while maintaining low conduction loss. Its 30V repetitive peak reverse voltage and 40A average forward current rating target mid-voltage secondary-side rectification where efficiency and thermal robustness are critical.

The TO-247AD package enables high-power dissipation with 1.2°C/W junction-to-case thermal resistance, and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker requirements-supporting automotive under-hood and industrial power supply deployments.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P), 3-terminal through-hole package with isolated metal tab (cathode-connected tab), matte tin-plated leads, UL 94V-0 molding compound, and 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-40CPH03-M3 and MBR4030CT, SR4030PTH delivers superior automotive qualification, lower thermal resistance, and guaranteed UL recognition-making it the preferred choice for AEC-Q101-compliant, thermally demanding 40A rectification where reliability and regulatory alignment are mandatory.

Availability

SR4030PTH is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS secondary rectification, and monitor/TV power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for SR4030PTH 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 automotive, industrial, and consumer markets since 1979.

The SR40xxPT series was developed to deliver high-current, high-reliability Schottky rectifiers with AEC-Q101 validation and UL safety recognition for next-generation power conversion in automotive and industrial equipment.

FAQ

What is the maximum junction temperature rating for SR4030PTH?

The SR4030PTH has a maximum junction temperature (T_J) rating of +150°C, confirmed in the Absolute Maximum Ratings table. This allows reliable operation in high-ambient environments such as automotive under-hood applications or sealed industrial enclosures. The SR4030PTH maintains rated 40A forward current up to 125°C case temperature, with derating beyond that point per the Forward Current Derating Curve in the datasheet.

Is SR4030PTH pin-compatible with other parts in the SR40xxPT family?

Yes, all SR40xxPT variants-including SR4030PTH-share identical TO-247AD (TO-3P) mechanical outline, pin assignment, and terminal configuration. The "x" in the part number denotes V_RRM (20V to 100V), but package dimensions, lead pitch, tab connection, and polarity marking remain consistent across the family, enabling board-level voltage scalability without layout changes.

Does SR4030PTH require a heatsink for 40A continuous operation?

Yes, SR4030PTH requires a properly sized heatsink for 40A continuous operation. With R_θJC = 1.2°C/W and typical V_F ≈ 0.55V at 20A, power dissipation reaches ~22W at full load. To maintain T_J ≤ 150°C at 85°C ambient, a heatsink with R_θCA ≤ 3.0°C/W is recommended-verified using the Forward Current Derating Curve and thermal impedance curves in the SR4030PTH datasheet.

What does the "H" suffix in SR4030PTH signify?

The "H" suffix in SR4030PTH explicitly indicates AEC-Q101 qualification, as defined in the Ordering Information section. It distinguishes this variant from non-automotive-grade SR4030PT parts. All SR40xxPTH devices undergo stress testing per AEC-Q101 Rev D, including HTGB, TC, UHAST, and mechanical shock-ensuring suitability for automotive power electronics where reliability under thermal and mechanical stress is mandatory.

How does the guard ring feature improve SR4030PTH reliability?

The guard ring in SR4030PTH enhances edge termination robustness, suppressing premature avalanche breakdown during voltage transients. This design feature directly improves survivability against load dump pulses (ISO 7637-2) and line surges in automotive and industrial systems-reducing field failure rates without requiring external TVS clamping. Data from TSC's reliability reports confirm >2× improvement in surge endurance versus non-guard-ring Schottky counterparts at 30V rating.