Taiwan Semiconductor Corporation SRAF1650

Overview

SRAF1650 from Taiwan Semiconductor is a 16A, 50V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.70V forward voltage at 16A/25°C, 275A surge current capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in DC-DC converters for automotive infotainment power supplies.

For engineers reviewing the SRAF1650 datasheet, SRAF1650 pinout, SRAF1650 application, or SRAF1650 equivalent, key selection criteria include its 50V V_RRM, 10mA reverse leakage at 125°C, junction-to-case thermal resistance of 4°C/W, and compatibility with lead-free reflow soldering per J-STD-002.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring structure to enhance over-voltage ruggedness and suppress avalanche-induced failure. Its low forward voltage drop and high dv/dt rating (10,000 V/µs) support fast-switching topologies in continuous conduction mode (CCM) and critical conduction mode (CrCM) SMPS designs.

The ITO-220AC package provides direct metal tab thermal path to heatsink, enabling stable operation up to 150°C junction temperature when mounted with ≤0.56 N·m torque. Reverse leakage remains under 10mA at 125°C, supporting reliable performance in thermally constrained automotive under-hood environments.

Key Specifications

Pinout & Package

ITO-220AC package with isolated metal tab (cathode-connected), matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, and 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-16CTH05-M3 and SB1650, the SRAF1650 offers balanced trade-offs: lower reverse leakage than SB1650 for standby-sensitive designs, and AEC-Q101 availability unlike VS-16CTH05-M3-making it optimal for cost-constrained automotive power modules needing both reliability and efficiency.

Availability

SRAF1650 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS output stages, and USB-C PD adapter secondary rectification requiring stable component supply across multi-year production cycles.

Supply support for SRAF1650 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, serving automotive, industrial, and consumer markets since 1979.

The SRAF16xx series targets high-reliability power conversion in thermally demanding environments, with design emphasis on low-loss Schottky performance, robust transient handling, and automotive-grade process control.

FAQ

What is the maximum junction temperature rating for the SRAF1650?

The SRAF1650 has a maximum junction temperature (T_J) rating of +150°C, validated per its absolute maximum ratings table. This allows operation in high-ambient environments such as automotive engine compartments when paired with appropriate heatsinking. The SRAF1650 maintains specified electrical parameters-including 500 µA reverse leakage at 25°C and <10mA at 125°C-within this thermal envelope.

Does the SRAF1650 have AEC-Q101 qualification?

The base SRAF1650 is not AEC-Q101 qualified; however, the AEC-Q101-compliant variant is designated SRAF1650H per the ordering information table. Both share identical electrical and thermal specifications, but SRAF1650H undergoes additional stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation per AEC-Q101 Rev G requirements.

What is the forward voltage of the SRAF1650 at elevated temperature?

The SRAF1650 exhibits a forward voltage (V_F) of 0.70V at 16A and 25°C. While the datasheet does not specify V_F at higher temperatures, Schottky diodes typically show negative temperature coefficient behavior-V_F decreases ~1.8 mV/°C. Thus, at 125°C junction, V_F is estimated near 0.52V, reducing conduction loss in high-temperature operation.

Can the SRAF1650 replace the SRAF1640 in an existing design?

Yes, the SRAF1650 can directly replace the SRAF1640 because both share identical package (ITO-220AC), pinout, thermal characteristics (R_θJC = 4°C/W), and forward current rating (16A). The only difference is V_RRM: 50V for SRAF1650 versus 40V for SRAF1640. This provides increased voltage margin in designs subject to line transients or output overshoot, with no layout or thermal changes required.

What is the surge current rating of the SRAF1650 and how is it tested?

The SRAF1650 has a non-repetitive peak forward surge current (I_FSM) rating of 275A, tested using an 8.3ms single half-sine wave superimposed on rated DC load per IEC 61000-4-5. This rating ensures survivability during cold-start inrush, lightning-induced transients, and short-circuit recovery events without metallization failure or bond-wire rupture.