Taiwan Semiconductor Corporation SRAF1690

Overview

SRAF1690 from Taiwan Semiconductor is a 16A, 90V Schottky barrier rectifier in ITO-220AC package, featuring 0.92V forward voltage at 16A and 100µA reverse leakage at 25°C, used for high-efficiency output rectification in DC-DC converters and SMPS secondary-side applications.

For engineers reviewing the SRAF1690 datasheet, SRAF1690 pinout, SRAF1690 application, or SRAF1690 equivalent, key selection factors include its 90V V_RRM, 275A I_FSM, 4°C/W R_θJC, AEC-Q101 qualification option (SRAF1690H), and thermal derating behavior up to 150°C junction temperature.

Technical Context

This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and guard ring over-voltage protection. Its low VF enables reduced conduction loss in high-frequency switching topologies, while the ITO-220AC package provides direct heatsink mounting capability via the metal tab.

The device supports repetitive peak reverse voltages up to 90V and withstands surge currents of 275A (8.3ms half-sine), with junction temperature range spanning –55°C to +150°C and critical dv/dt rating of 10,000 V/µs.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with electrically isolated metal tab, matte tin-plated leads, UL 94V-0 molding compound, 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-16CTH09-M3 and MUR1690CT, the SRAF1690 offers balanced VF/IR trade-off and electrically isolated tab for simplified thermal design, making it optimal for single-diode, heatsink-mounted applications demanding AEC-Q101 readiness and UL recognition.

Availability

SRAF1690 is available at Aetrix Electronics and suitable for server power supplies, automotive DC-DC converters, industrial SMPS, and USB-C PD adapters requiring stable component supply and long-term manufacturability.

Supply support for SRAF1690 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in power discrete devices, including rectifiers, MOSFETs, and TVS diodes, with global distribution and AEC-Q101 qualified product lines.

The SRAF1690 belongs to TSC's high-current Schottky rectifier family designed for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where thermal robustness and surge immunity are critical.

FAQ

What is the maximum junction temperature rating for the SRAF1690?

The SRAF1690 has a maximum junction temperature (T_J) rating of +150°C, allowing operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive modules. This rating applies across the full current range when thermal design maintains case temperature within derating limits per the forward current derating curve in the datasheet. The SRAF1690 achieves this with its ITO-220AC package and 4°C/W junction-to-case thermal resistance.

Is the SRAF1690 pin-compatible with other parts in the SRAF16xx series?

Yes, all SRAF16xx parts-including SRAF1690-share identical ITO-220AC packaging, pinout, and mechanical footprint. The only differences are V_RRM ratings (20V to 100V) and corresponding forward voltage/reverse leakage values. This allows direct substitution during design iteration or voltage-scaling without PCB changes, provided thermal and electrical margins remain valid for the new rating.

Does the SRAF1690 have AEC-Q101 qualification?

The base SRAF1690 is not AEC-Q101 qualified, but the variant SRAF1690H is fully AEC-Q101 qualified and shares identical electrical specifications. The "H" suffix denotes automotive-grade screening, including stress testing per JESD22 and lifetime validation at elevated temperature and humidity. For automotive applications, specify SRAF1690H-not SRAF1690-to ensure compliance.

What is the reverse leakage current specification for the SRAF1690 at elevated temperature?

At T_J = 125°C and rated V_RRM = 90V, the SRAF1690 exhibits ≤ 5 mA reverse leakage current. This value is confirmed in the Electrical Specifications table and reflects worst-case behavior under high-temperature stress. At 100°C, leakage is unspecified in the datasheet, and at 25°C it is guaranteed ≤ 100 µA. Designers should use the 125°C value for thermal worst-case analysis in high-reliability systems.

How does the guard ring feature improve reliability of the SRAF1690?

The guard ring in the SRAF1690 mitigates edge breakdown under transient overvoltage conditions-such as load dump or inductive switching spikes-by distributing electric field stress away from the active junction periphery. This structural enhancement increases the device's effective dv/dt immunity (rated at 10,000 V/µs) and improves long-term reliability in noisy power systems without requiring external snubber networks. It is a key factor in the SRAF1690's suitability for industrial and automotive rectification.