Taiwan Semiconductor Corporation SRAF1050

Overview

SRAF1050 from Taiwan Semiconductor is a 10A, 50V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.70V typical forward voltage at 10A and 25°C, 200A surge current capability, and AEC-Q101 qualification option (SRAF1050H), used in high-efficiency DC-DC converters and industrial SMPS.

For engineers reviewing the SRAF1050 datasheet, SRAF1050 pinout, SRAF1050 application, or SRAF1050 equivalent, key selection criteria include VRRM=50V, IF=10A, VF≤0.70V @10A/25°C, IR≤500µA @50V/25°C, and TJ max=125°C - all confirmed for the exact SRAF1050 variant.

Technical Context

This single-die Schottky rectifier uses guard ring technology for over-voltage protection and achieves low conduction loss via optimized metal-semiconductor junction design. Its 4°C/W junction-to-case thermal resistance supports high-power-density mounting on heatsinks without forced airflow.

The device operates across -55°C to +125°C junction temperature range with 10,000 V/µs critical dv/dt rating, enabling reliable use in fast-switching topologies like synchronous buck converters and flyback secondary-side rectification.

Key Specifications

Pinout & Package

Package: ITO-220AC - insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, matte tin-plated leads, and 0.56 N·m max mounting torque. 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-10BQ050 and SB1050, the SRAF1050 offers balanced performance: lower VF than SB1050 improves efficiency, while its isolated ITO-220AC tab simplifies heatsinking versus SB1050's insulation requirement - though it lacks the 150°C TJ rating of VS-10BQ050.

Availability

SRAF1050 is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, automotive ADAS modules, and telecom adapters requiring stable component supply and long-term manufacturability.

Supply support for SRAF1050 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The SRAF1050 belongs to TSC's AEC-Q101-capable Schottky rectifier product line, engineered for high-efficiency, high-surge, thermally robust operation in space-constrained power conversion systems.

FAQ

What is the maximum junction temperature rating for SRAF1050?

The SRAF1050 has a maximum junction temperature (TJ max) of 125°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This rating applies to the standard SRAF1050 variant; the AEC-Q101-qualified SRAF1050H maintains the same TJ max. Operation beyond 125°C risks parametric shift and accelerated degradation. Thermal design must ensure junction temperature remains within this limit under worst-case ambient and load conditions.

Is SRAF1050 pin-compatible with other devices in the SRAF10xx family?

Yes, all SRAF10xx devices - including SRAF1020 through SRAF10150 - share identical ITO-220AC package dimensions, pinout (anode, cathode, isolated tab), and mechanical mounting interface. The SRAF1050 uses the same footprint and solder pad layout as SRAF1030 or SRAF1090, enabling voltage-scaling flexibility without PCB revision. However, electrical parameters such as VRRM, VF, and IR differ significantly across the family and must be validated per application.

Does SRAF1050 have automotive qualification?

The base SRAF1050 is not AEC-Q101 qualified; however, the SRAF1050H variant is explicitly listed as AEC-Q101 qualified in Taiwan Semiconductor's ordering information and features section. SRAF1050H undergoes full stress testing per AEC-Q101 Rev D, including HTGB, TC, and HTRB. For automotive applications, specify SRAF1050H - the "H" suffix denotes qualification, and both variants share identical electrical and thermal specs except for reliability validation.

What is the forward voltage drop of SRAF1050 at 10A and 100°C junction temperature?

The datasheet specifies VF only at TJ = 25°C (0.70V typ). No typ/max VF value is provided at 100°C for SRAF1050. However, Figure 4 (Typical Forward Characteristics) shows VF increases with temperature: at 10A, VF rises to approximately 0.62V at 100°C - extrapolated from curve data for SRAF1050–SRAF1060 group. Designers should apply derating and verify with thermal simulation, as VF drift impacts conduction loss and thermal runaway risk.

How does the isolated tab in ITO-220AC affect heatsink mounting for SRAF1050?

The ITO-220AC package used by SRAF1050 features an electrically isolated metal tab, allowing direct mechanical attachment to a grounded or floating heatsink without insulating hardware. Unlike standard TO-220AC, no mica washer or thermal pad is required for electrical isolation. Mounting torque must not exceed 0.56 N·m to avoid package cracking. This simplifies thermal assembly and improves thermal transfer efficiency by eliminating interfacial resistance from insulators.