Taiwan Semiconductor Corporation SRAS2090H

Overview

SRAS2090H from Taiwan Semiconductor is a 20A, 90V Schottky barrier surface-mount rectifier in TO-263AB (D2PAK) package, designed for high-efficiency DC/DC conversion and freewheeling applications with low forward voltage (0.92 V at 20 A, 25°C) and high surge capability (330 A, 8.3 ms). It features AEC-Q101 qualification, guard ring overvoltage protection, and moisture sensitivity level 1.

For engineers reviewing the SRAS2090H datasheet, SRAS2090H pinout, SRAS2090H application, or SRAS2090H equivalent, key selection factors include its 90 V repetitive peak reverse voltage, 1.5 °C/W junction-to-case thermal resistance, 100 µA max reverse leakage at 25°C, and suitability for automotive lighting and reverse battery protection circuits requiring robust surge handling and RoHS/halogen-free compliance.

Technical Context

The SRAS2090H implements a single-die Schottky barrier structure optimized for low conduction loss in medium-voltage switching power supplies. Its 90 V V_RRM rating targets applications where 60–100 V systems demand higher blocking than standard 40–60 V Schottkys but lower cost than SiC alternatives.

Thermally, it delivers 1.5 °C/W R_θJC via the TO-263AB copper tab, enabling direct heatsinking; its 150 °C maximum junction temperature and 5 mA reverse leakage at 125 °C support operation in under-hood automotive environments without derating below 20 A average current.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, with exposed copper drain tab for thermal and electrical connection. Matte tin-plated leads; polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20BQ090P-M3/45 and MUR2090CT, the SRAS2090H offers the optimal balance of AEC-Q101 compliance, 0.92 V forward drop, and 1.5 °C/W thermal resistance in surface-mount form-making it uniquely suited for space-constrained, high-reliability automotive power stages.

Availability

SRAS2090H is available at Aetrix Electronics and suitable for automotive lighting, reverse battery protection, and DC/DC converter output rectification requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SRAS2090H 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 devices, TVS diodes, and rectifiers for automotive and industrial markets.

The SRAS2090H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-current, medium-voltage automotive power conversion where low VF, robust surge immunity, and surface-mount manufacturability are critical.

FAQ

What is the maximum junction temperature rating for SRAS2090H?

The SRAS2090H has a maximum junction temperature (T_J) of +150°C, validated per AEC-Q101 stress test conditions. This allows uninterrupted 20 A operation in ambient temperatures up to 100°C when mounted on ≥10 cm² of 2 oz copper with thermal vias, as confirmed by its 1.5 °C/W R_θJC and derating curve in the official datasheet. The SRAS2090H maintains stable reverse leakage (<5 mA) even at 125°C junction temperature.

Is SRAS2090H suitable for reverse battery protection in automotive ECUs?

Yes, the SRAS2090H is explicitly qualified for reverse battery protection in automotive ECUs. Its AEC-Q101 certification, 90 V V_RRM, 100 µA max reverse leakage at 25°C, and ability to sustain 330 A surge current make it ideal for series-blocking configurations. The SRAS2090H's guard ring design prevents edge breakdown during load-dump events, and its moisture sensitivity level 1 eliminates pre-bake requirements in SMT assembly-key for high-volume ECU production.

What is the forward voltage of SRAS2090H at 20 A and 125°C junction temperature?

The SRAS2090H forward voltage is not specified at 125°C in the datasheet; only the 25°C value (0.92 V max) and 100°C value (0.85 V typ) are provided. However, typical Schottky behavior shows VF decreases with rising temperature-so at 125°C, VF is expected to be ~0.82–0.84 V. For design-critical applications, engineers should verify actual performance using the SRAS2090H's Fig.4 Typical Forward Characteristics curve and apply appropriate thermal modeling. The SRAS2090H remains fully rated for 20 A up to 150°C T_J.

Does SRAS2090H have a halogen-free and RoHS-compliant construction?

Yes, the SRAS2090H is both halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU. Its molding compound, lead finish (matte tin), and internal die attach materials meet these environmental standards without performance trade-offs. This compliance is documented in the "Features" section of the SRAS2090H datasheet (Version A2103) and verified through TSC's material declarations. The SRAS2090H is suitable for green manufacturing programs requiring full substance-level traceability.

What is the marking code printed on the SRAS2090H device body?

Per the SRAS2090H datasheet (Version A2103), the marking code on the device body is "SRAS 2090". This appears as two-line laser marking: "SRAS" on the first line and "2090" on the second line, accompanied by date code (YWW) and factory code (F). The marking is located on the top surface of the TO-263AB package, adjacent to the polarity indicator. This matches the ordering code SRAS2090H and confirms authenticity during incoming inspection.