Taiwan Semiconductor Corporation SRS1020H

Overview

SRS1020H from Taiwan Semiconductor is a 10A, 20V AEC-Q101-qualified Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.55V forward voltage at 5A/25°C, 120A surge capability, and junction-to-case thermal resistance of 2°C/W. It serves as a low-loss freewheeling or reverse-battery protection diode in automotive DC/DC converters.

For engineers reviewing the SRS1020H datasheet, SRS1020H pinout, SRS1020H application, or SRS1020H equivalent, key selection criteria include its 20V V_RRM, 10A continuous forward current, AEC-Q101 qualification, TO-263AB thermal performance, and dual-die construction for high-reliability power conversion.

Technical Context

The SRS1020H employs a dual-die Schottky structure optimized for low forward voltage and fast switching in high-frequency power supplies. Its 20V repetitive peak reverse voltage and 14V RMS reverse rating define its use in low-voltage DC rails, while the 120A non-repetitive surge rating supports transient load handling in automotive environments.

Thermally, it delivers 2°C/W junction-to-case resistance and operates up to 125°C junction temperature. The device uses matte tin-plated leads compliant with J-STD-002 and meets JESD 201 Class 2 whisker resistance and UL 94V-0 flammability standards.

Key Specifications

Pinout & Package

TO-263AB (D2PAK) package with three terminals: Anode, Cathode, and exposed thermal pad (electrically connected to cathode). Molding compound meets UL 94V-0; matte tin-plated leads ensure solderability per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ020HM3 and SB1020, the SRS1020H uniquely combines AEC-Q101 qualification, 0.55V V_F, and 2°C/W R_θJC in a single TO-263AB device-enabling automotive-grade reliability without thermal derating penalties.

Availability

SRS1020H is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and LED driver freewheeling applications requiring stable component supply and AEC-Q101 compliance.

Supply support for SRS1020H 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 automotive, industrial, and consumer markets since 1979.

The SRS1020H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, thermally demanding automotive power conversion where low V_F and rugged surge capability are mandatory.

FAQ

What is the maximum junction temperature rating for the SRS1020H?

The SRS1020H has a maximum junction temperature (T_J) of +125°C under continuous operation, verified per AEC-Q101 stress testing. This rating applies across its full 10A forward current range when thermal design maintains case temperature within limits defined by its 2°C/W R_θJC. Exceeding this temperature risks parametric shift and long-term reliability degradation.

Is the SRS1020H pin-compatible with other devices in the SRS10xxH family?

Yes, all SRS10xxH devices-including SRS1020H-share identical TO-263AB (D2PAK) mechanical dimensions, pinout, and thermal pad configuration. Voltage ratings differ (20V to 150V), but PCB layout, solder stencil, and assembly process remain unchanged across the family.

Does the SRS1020H require a heatsink for 10A continuous operation?

The SRS1020H can sustain 10A continuous current without an external heatsink if mounted on ≥2 oz copper with ≥4 cm² thermal pad area and ambient temperature ≤ 50°C. Its 2°C/W R_θJC enables direct PCB thermal transfer; however, forced air or metal-core boards are recommended for ambient >60°C or high-duty-cycle applications.

What does the "H" suffix indicate in SRS1020H?

The "H" suffix in SRS1020H denotes the halogen-free version compliant with IEC 61249-2-21. It confirms the molding compound contains no brominated or chlorinated flame retardants, distinguishing it from non-H variants that may use halogenated materials for UL 94V-0 compliance.

How is the polarity marked on the SRS1020H package?

The SRS1020H uses a standardized TO-263AB marking: the cathode is indicated by a wide band or "K" symbol adjacent to the cathode lead, and the anode is the opposite lead. The exposed thermal pad is electrically connected to the cathode, so PCB layout must maintain cathode net continuity to the pad.