Taiwan Semiconductor Corporation SR1050

Overview

SR1050 from Taiwan Semiconductor is a 10A, 50V Schottky barrier rectifier in TO-220AB package with dual-die configuration, low forward voltage (0.70 V at 5 A, 25°C), 120 A surge capability, and junction temperature rating up to +150°C. It serves as primary output rectification in high-efficiency DC/DC converters.

For engineers reviewing the SR1050 datasheet, SR1050 pinout, SR1050 application, or SR1050 equivalent, key selection criteria include repetitive peak reverse voltage (50 V), forward voltage drop at rated current, thermal resistance (3°C/W), reverse leakage (500 µA at 25°C), and AEC-Q101 qualification status for automotive-grade reliability validation.

Technical Context

The SR1050 operates as a single-polarity, dual-die Schottky rectifier optimized for low conduction loss in continuous forward-biased switching applications. Its 50 V V_RRM, 10 A average forward current, and 120 A non-repetitive surge rating support transient-heavy power rails.

Thermal performance is defined by a 3°C/W junction-to-case resistance and operation up to +150°C junction temperature. Guard ring structure provides overvoltage protection, while matte tin-plated leads ensure J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: TO-220AB - Insulated case with center tab (cathode), two outer leads (anodes), UL 94V-0 molding compound, 1.80 g mass, and 0.56 N·m maximum mounting torque.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ050 and SB1050, the SR1050 uniquely delivers dual-anode routing in TO-220AB with AEC-Q101 availability (SR1050H), making it the only option supporting both automotive qualification and flexible multi-output rectification without board redesign.

Availability

SR1050 is available at Aetrix Electronics and suitable for server power supply rectification, automotive DC/DC converter output stages, and industrial PLC power modules requiring stable component supply and long-term manufacturability.

Supply support for SR1050 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 1979.

The SR1050 belongs to TSC's SR10xx Schottky rectifier family, engineered for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where low VF, rugged surge handling, and thermal robustness are critical.

FAQ

What is the maximum junction temperature rating for the SR1050?

The SR1050 has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official datasheet. This allows operation in high-ambient environments such as under-hood automotive locations or enclosed industrial enclosures. Derating curves confirm usable current capacity down to 0 A at +150°C case temperature, and the device maintains specified electrical parameters within this full range. The SR1050 must be mounted with appropriate thermal interface and heatsinking to avoid exceeding this limit during sustained operation.

Does the SR1050 have AEC-Q101 qualification?

The base SR1050 is not AEC-Q101 qualified, but the SR1050H variant is explicitly listed in the ordering information as AEC-Q101 qualified. The "H" suffix denotes full stress testing per AEC-Q101 Rev D, including temperature cycling, highly accelerated life testing, and mechanical shock. For automotive applications requiring qualification evidence, only SR1050H should be selected - the standard SR1050 does not carry this certification and must not be used in safety-critical or automotive production without additional validation.

How is the dual-die configuration of the SR1050 implemented electrically?

The SR1050 integrates two independent Schottky dies sharing a common cathode connected to the center tab, with separate anodes routed to the two outer leads. This configuration enables true dual-anode operation - each anode can be driven independently in interleaved or redundant topologies. Unlike paralleled single-die devices, the dual-die structure ensures matched thermal and electrical characteristics between anodes, minimizing current imbalance. The marking diagram confirms polarity orientation, and the TO-220AB pinout validates this three-terminal arrangement.

What is the forward voltage specification for the SR1050 at elevated temperature?

The SR1050 forward voltage (V_F) is specified as 0.70 V maximum at I_F = 5 A and T_J = 25°C. At higher junction temperatures, V_F decreases - typical curves show ~0.58 V at 100°C and ~0.52 V at 125°C. This negative temperature coefficient is inherent to Schottky diodes and improves conduction efficiency under thermal stress. However, design margins must still account for worst-case V_F at minimum temperature (e.g., -40°C), where V_F rises slightly above room-temperature values.

Can the SR1050 replace a standard single-die TO-220 Schottky rectifier?

Yes, the SR1050 can replace a single-die TO-220 Schottky rectifier in many cases, but only if the circuit uses the center tab as cathode and one outer lead as anode - leaving the second anode unconnected or tied to the same node. Its pinout matches TO-220AB mechanical dimensions and mounting, and its 50 V/10 A ratings align with common single-die equivalents. However, full utilization of its dual-anode capability requires PCB layout changes. For drop-in replacement without layout modification, verify that the existing design does not rely on isolated anode routing or require AEC-Q101 qualification - those features are unique to SR1050H and its dual-die architecture.