Taiwan Semiconductor Corporation SRAF1040 C0G

Overview

SRAF1040 C0G from Taiwan Semiconductor is a 10A, 40V repetitive peak reverse voltage Schottky barrier rectifier in ITO-220AC package, featuring 0.55V forward voltage at 10A/25°C, 200A surge capability, and AEC-Q101 qualification option (SRAF1040H). It serves as primary output rectifier in high-efficiency DC-DC converters for automotive infotainment power supplies.

For engineers reviewing the SRAF1040 C0G datasheet, SRAF1040 C0G pinout, SRAF1040 C0G application, or SRAF1040 C0G equivalent, key selection criteria include its 40V V_RRM, 10A continuous forward current rating, 4°C/W junction-to-case thermal resistance, low 500µA reverse leakage at 25°C, and compatibility with high-frequency switching topologies requiring minimal conduction loss.

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 fast recovery (no minority carrier storage) enable operation in high-frequency SMPS designs up to several hundred kHz without significant switching loss penalty.

The ITO-220AC package provides direct metal tab thermal path to heatsink, supporting sustained 10A conduction at case temperatures up to 100°C when mounted with ≤0.56 N·m torque. Reverse leakage remains under 15mA at 100°C junction temperature, ensuring stable performance in thermally constrained environments.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with electrically isolated metal tab (rated ≥2500 V_RMS isolation), matte tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and 1.70g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ040-M3/45 and SB1040-E3/45, the SRAF1040 C0G delivers superior thermal performance (4°C/W), lower forward voltage (0.55V), full AEC-Q101 qualification, and UL recognition-making it the preferred choice for automotive and safety-critical industrial power designs where reliability and regulatory alignment are mandatory.

Availability

SRAF1040 C0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS outputs, and consumer adapter rectification requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SRAF1040 C0G 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 devices, rectifiers, and protection components since 1995.

The SRAF1040 C0G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments where thermal stability and transient robustness are critical.

FAQ

What is the maximum junction temperature rating for the SRAF1040 C0G?

The SRAF1040 C0G has a maximum junction temperature (T_J) rating of 125°C. This value is specified for standard-grade devices; the datasheet confirms operation from –55°C to +125°C under continuous conditions. Derating of forward current begins above 100°C case temperature, and thermal design must ensure the junction does not exceed 125°C under worst-case load and ambient conditions. The SRAF1040 C0G achieves this with its 4°C/W R_θJC and ITO-220AC package construction.

Does the SRAF1040 C0G have AEC-Q101 qualification?

Yes, the SRAF1040 C0G is available in an AEC-Q101-qualified version designated as SRAF1040H. While the base SRAF1040 C0G part number itself is not automatically qualified, the 'H' suffix indicates full compliance with AEC-Q101 stress testing including HTGB, HTRB, and temperature cycling. This makes SRAF1040H suitable for automotive powertrain and body electronics applications requiring certified reliability.

What is the forward voltage drop of the SRAF1040 C0G at rated current?

The SRAF1040 C0G exhibits a typical forward voltage (V_F) of 0.55 V at 10 A and 25°C junction temperature, as confirmed in the Electrical Specifications table. This value is measured under pulse conditions (PW = 0.3 ms) and represents the conduction loss baseline. At elevated temperatures (e.g., 100°C), V_F decreases slightly due to Schottky physics, maintaining efficiency advantage over silicon alternatives throughout the operating range of the SRAF1040 C0G.

How does the SRAF1040 C0G compare to silicon rectifiers in switching applications?

The SRAF1040 C0G eliminates minority carrier storage delay, enabling true zero-recovery behavior ideal for high-frequency switching (≥200 kHz). Unlike silicon rectifiers, it produces no reverse recovery current spike, reducing EMI and snubber losses. With 0.55 V V_F vs. ~0.9–1.1 V for fast recovery diodes, the SRAF1040 C0G cuts conduction loss nearly in half at 10 A-directly improving efficiency and thermal performance in dense power stages using the SRAF1040 C0G.

What packaging and marking information applies to the SRAF1040 C0G?

The SRAF1040 C0G is supplied in ITO-220AC package with 50 units per tube. Marking includes "SRAF1040" laser-etched on the device body, along with green compound indicator (G), factory code (F), and date code (YWW). Polarity is marked by cathode band; the metal tab is electrically isolated and intended for direct heatsink mounting. Mounting torque must not exceed 0.56 N·m to prevent mechanical damage to the SRAF1040 C0G internal bond wires.