Taiwan Semiconductor Corporation SRF1050

Overview

SRF1050 from Taiwan Semiconductor is a 10A, 50V AEC-Q101-qualified Schottky barrier rectifier in ITO-220AB package with dual-die configuration, 0.70V max forward voltage at 5A/25°C, 120A surge capability, and 3.5°C/W junction-to-case thermal resistance-used in automotive-grade DC-DC converters and industrial SMPS.

For engineers reviewing the SRF1050 datasheet, SRF1050 pinout, SRF1050 application, or SRF1050 equivalent, key selection criteria include V_RRM = 50 V, I_F = 10 A continuous, T_J max = 125°C (standard) / 150°C (derated), reverse leakage ≤500 µA @ 25°C, and ITO-220AB mechanical compatibility with heatsink mounting.

Technical Context

The SRF1050 integrates two Schottky diodes in a single ITO-220AB case, enabling dual-output or parallel-configured rectification paths. Its guard ring structure provides overvoltage protection, and matte tin-plated leads meet J-STD-002 solderability standards.

Thermal performance is defined by R_θJC = 3.5°C/W for V_RRM ≤60 V variants (including SRF1050), supporting high-power density designs where junction temperature must stay ≤125°C under 10A DC load with adequate heatsinking.

Key Specifications

Pinout & Package

Package: ITO-220AB - insulated thermoplastic outline with isolated metal tab, UL 94V-0 rated molding compound, 1.70 g mass, 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 SRF1050, VS-10BQ050 offers better thermal and conduction performance but lacks AEC-Q101 qualification; SB1050 provides identical voltage/current specs in a non-isolated package with higher thermal resistance-making SRF1050 optimal for automotive and isolated industrial use cases requiring reliability and thermal headroom.

Availability

SRF1050 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS output stages, and laptop adapter secondary rectification requiring stable component supply and AEC-Q101 compliance.

Supply support for SRF1050 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The SRF10xx series was designed specifically for high-current, medium-voltage Schottky rectification in space-constrained power supplies where thermal robustness, surge immunity, and automotive qualification are mandatory.

FAQ

What is the maximum junction temperature rating for the SRF1050?

The SRF1050 has a maximum junction temperature (T_J) rating of 125°C under standard conditions, with extended operation up to 150°C possible under derated current conditions. This dual-rating supports flexible thermal design in automotive and industrial environments where ambient temperatures exceed 85°C. The SRF1050 datasheet specifies absolute maximum ratings across both ranges, and thermal design must account for R_θJC = 3.5°C/W and heatsink interface resistance to ensure SRF1050 remains within safe operating limits.

Is the SRF1050 pin-compatible with other parts in the SRF10xx family?

Yes, all SRF10xx devices-including SRF1020 through SRF10200-share identical ITO-220AB packaging, pinout, and mechanical footprint. The SRF1050 uses the same Anode 1 / Cathode Common / Anode 2 / Metal Tab configuration as SRF1030, SRF1040, and SRF1060, enabling direct voltage-rating swaps on existing PCBs without layout changes. However, thermal and electrical behavior (e.g., V_F, I_R) varies across the family, so system validation is required after substitution.

Does the SRF1050 have AEC-Q101 qualification?

Yes, the SRF1050 is AEC-Q101 qualified when ordered with the "H" suffix (e.g., SRF1050H). The base SRF1050 part is not automatically qualified-qualification applies only to versions explicitly marked and tested per AEC-Q101 stress test conditions. For automotive applications requiring qualification, specify SRF1050H and verify packaging code and date code compliance with TSC's AEC-Q101 certificate scope. The SRF1050H meets all requirements including temperature cycling, humidity bias, and ESD testing.

What is the reverse leakage current specification for the SRF1050 at elevated temperature?

The SRF1050 exhibits ≤10 mA reverse leakage current (I_R) per diode at rated V_R = 50 V and junction temperature T_J = 100°C. At T_J = 125°C, leakage is unspecified in the datasheet, but typical curves show values below 20 mA. This behavior is consistent with Schottky physics and must be accounted for in low-power standby designs. Designers should reference Figure 3 (Typical Reverse Characteristics) in the SRF1050 datasheet to model leakage across temperature for precise power budgeting.

Can the SRF1050 be used in parallel configurations?

Yes, the SRF1050 supports parallel operation due to its positive temperature coefficient of forward voltage, which promotes current sharing. When paralleling multiple SRF1050 units, ensure matched trace lengths, symmetric thermal coupling to a common heatsink, and individual current-sense resistors for monitoring. The dual-die internal structure does not preclude external paralleling-each SRF1050 functions as two independent Schottky elements, and paralleling enhances total current capacity beyond 10A while maintaining thermal balance. Always validate SRF1050 parallel performance under worst-case load and temperature conditions.