Taiwan Semiconductor Corporation SRS20150

Overview

SRS20150 from Taiwan Semiconductor is a 20A, 150V Schottky barrier rectifier in TO-263AB (D2PAK) package, designed for high-efficiency DC/DC conversion and SMPS secondary-side rectification with VF = 1.02 V at 10 A and IR = 100 µA at 25°C. It features dual-die construction, guard ring overvoltage protection, and 200 A surge capability.

For engineers reviewing the SRS20150 datasheet, SRS20150 pinout, SRS20150 application, or SRS20150 equivalent, key selection criteria include its 150 V VRRM rating, 1.02 V forward voltage at 10 A, 1.5 °C/W junction-to-case thermal resistance, 125–150°C max junction temperature range, and TO-263AB mechanical compatibility with high-current PCB layouts.

Technical Context

The SRS20150 implements a dual-die Schottky barrier structure optimized for low conduction loss at high reverse voltage. Its 150 V VRRM rating enables use in 48 V and 60 V bus systems where higher-voltage margin is required versus 100 V variants.

Thermal performance is defined by R_θJC = 1.5 °C/W and TJ ratings of –55°C to +125°C (continuous) / +150°C (short-term), supporting operation under sustained load in compact power converters without forced airflow.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, single-ended anode-cathode configuration with exposed cathode tab for thermal and electrical connection. 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 SRS20150, VS-20CPH15-M3 trades marginally higher VF for broader global distribution, while SB20150 offers lower IR at the cost of reduced thermal performance-both require validation of layout thermal relief and solder mask opening for the cathode tab.

Availability

SRS20150 is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, telecom rectifiers, and battery charger designs requiring stable component supply and long-lifecycle support.

Supply support for SRS20150 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 devices, and MOSFETs since 1992.

The SRS20150 belongs to TSC's high-voltage Schottky rectifier product line, engineered for efficiency-critical secondary-side rectification in enterprise and industrial power systems where 100–150 V blocking capability and low VF are essential.

FAQ

What is the maximum junction temperature rating for the SRS20150?

The SRS20150 has a maximum continuous junction temperature of +125°C and a short-term limit of +150°C. This dual-rating allows operation at elevated temperatures during transient overload conditions while maintaining reliability under steady-state loads. The SRS20150 must be mounted with adequate copper area or heatsinking to maintain TJ ≤ 125°C during continuous 20 A conduction. Thermal design should reference R_θJC = 1.5 °C/W and ambient conditions.

Does the SRS20150 have a guard ring structure, and what is its function?

Yes, the SRS20150 incorporates a guard ring structure explicitly documented in its datasheet features. This design element enhances edge termination robustness, preventing premature avalanche breakdown under voltage transients or non-uniform electric field stress. In practical terms, the guard ring allows the SRS20150 to sustain rated 150 V VRRM without derating in noisy or poorly filtered DC/DC outputs, improving system-level reliability compared to non-guarded Schottky rectifiers.

What is the forward voltage of the SRS20150 at 20 A and 125°C?

The SRS20150 datasheet specifies VF = 1.02 V at 10 A and 25°C; no direct value is given for 20 A/125°C. However, based on typical Schottky characteristics and the provided Fig.4 (Forward Characteristics), VF increases to approximately 1.15–1.18 V at 20 A and 125°C. This elevated drop directly impacts conduction loss-calculations using 1.16 V yield ~23.2 W loss at 20 A-requiring careful thermal design to avoid exceeding TJ limits.

Is the SRS20150 RoHS and halogen-free compliant?

Yes, the SRS20150 is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements are confirmed in the "Features" section of the official datasheet. The device uses matte tin-plated leads and UL 94V-0 molding compound, satisfying environmental and safety requirements for commercial, industrial, and telecom equipment. No exemptions or exceptions apply to the SRS20150.

What is the moisture sensitivity level (MSL) of the SRS20150, and how does it affect assembly?

The SRS20150 has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not sensitive to moisture-induced damage during reflow soldering. This eliminates the need for dry-packing, baking, or floor-life tracking before assembly. The SRS20150 can be stored indefinitely at ambient conditions and placed directly into standard lead-free reflow profiles without preconditioning-reducing manufacturing overhead and minimizing risk of popcorning or delamination.