Infineon Technologies AIDW20S65C5XKSA1

Overview

AIDW20S65C5XKSA1 from Infineon is a 650 V / 20 A silicon carbide Schottky diode in TO-247-3 package, designed as a unidirectional power rectifier with zero reverse recovery charge, 175 °C maximum junction temperature, and automotive-grade AEC-Q101 qualification. It serves as a high-efficiency freewheeling/anti-parallel diode in traction inverters and DC-DC boost converters for EV powertrains.

For engineers reviewing the AIDW20S65C5XKSA1 datasheet, AIDW20S65C5XKSA1 pinout, AIDW20S65C5XKSA1 application, or AIDW20S65C5XKSA1 equivalent, key selection criteria include its 29 nC capacitive charge at VR = 400 V, 1.7 V typical forward voltage at 20 A and 25 °C, 100 V/ns dv/dt ruggedness, thermal resistance RthJC of 1.0–1.4 K/W, and AEC-Q101 validation for automotive power modules.

Technical Context

This 5th-generation CoolSiC™ diode uses thin-wafer SiC epitaxy to achieve low Qc × Vf figure of merit, enabling high-frequency operation without reverse recovery losses. Its Schottky barrier structure eliminates minority-carrier storage, resulting in temperature-independent switching behavior and no forward/reverse recovery transients.

The device is optimized for complementary use with Infineon's 650 V IGBTs and CoolMOS™ devices in hard-switched topologies. Its 776 A non-repetitive surge current rating (tp = 10 µs) and 103 A sine-halfwave surge capability support robust fault handling in automotive on-board chargers and PFC stages.

Key Specifications

Pinout & Package

Package: TO-247-3 (PG-TO247-3-41), isolated tab, RoHS-compliant Pb-free lead plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPSC20H065D and C4D20120D, AIDW20S65C5XKSA1 uniquely combines AEC-Q101 validation, TO-247-3 isolation, and balanced Qc/Vf performance-making it the only choice for production automotive traction inverters requiring zero-recovery reliability and thermal robustness.

Availability

AIDW20S65C5XKSA1 is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and DC-DC boost converters requiring stable component supply, automotive qualification, and high-temperature reliability.

Supply support for AIDW20S65C5XKSA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and automotive ICs, with global R&D and manufacturing infrastructure.

The CoolSiC™ Automotive Schottky Diode product line targets high-efficiency, high-reliability power conversion in electric vehicle drivetrains, delivering zero-recovery performance and AEC-Q101 validation for 650 V systems.

FAQ

What is the thermal resistance (RthJC) of AIDW20S65C5XKSA1, and how does it impact heatsink design?

The junction-to-case thermal resistance is specified as 1.0–1.4 K/W. This narrow range reflects tight process control in Infineon's SiC wafer fabrication. For a 20 A continuous load at 150 °C junction temperature, this translates to ~28–39 W of power dissipation, requiring a heatsink with ≤0.7 K/W total thermal resistance (including interface material) to maintain safe operation under worst-case ambient conditions.

Does AIDW20S65C5XKSA1 require a gate driver or external control circuitry?

No. As a passive Schottky diode, AIDW20S65C5XKSA1 operates without any gate drive or control signals. It conducts automatically when forward-biased and blocks when reverse-biased. Its zero reverse recovery eliminates need for snubbers or active clamping circuits typically used with Si fast recovery diodes in high-frequency converters.

How does the 175 °C maximum junction temperature affect system-level reliability?

The 175 °C Tj,max rating enables sustained operation at elevated temperatures common in under-hood automotive environments. Combined with low thermal resistance and absence of minority-carrier degradation mechanisms, it extends lifetime by >2× versus 150 °C-rated Si diodes under identical thermal stress, as validated in AEC-Q101 temperature cycling and high-temperature operating life tests.

Can AIDW20S65C5XKSA1 replace silicon diodes in existing designs without layout changes?

Yes-mechanically and electrically, it is a direct drop-in replacement for TO-247-3 silicon diodes with same footprint and pinout. However, due to its lower forward voltage and zero recovery, snubber components may be reduced or removed, and gate drive timing may be adjusted to exploit faster switching. Thermal design should be re-evaluated using the improved RthJC and lower conduction loss.