1. Quality Certification and Grade: DI050N06D1-AQ: Clearly marked with Grade: Automotive and Qualification: AEC-Q101. DI050N06D1: Both fields are blank. The `-AQ` version is specifically designed and qualified for automotive electronics applications. It has passed the AEC-Q101 reliability standard tests—including more stringent temperature cycling, high-temperature reverse bias, and early failure rate assessments—and its manufacturing process, supply chain traceability, and quality management system comply with automotive industry requirements. The standard version follows general industrial-grade standards and lacks this series of certifications. This is the core distinction and the primary reason for the price difference (approximately 20%). 2. Implicit Differences in Operating Temperature Range: Both devices specify an Operating Temperature of `-55°C to 150°C (Tj)`. Although the junction temperature range is identical, the performance and reliability of the `-AQ` version across the entire temperature range are guaranteed by AEC-Q101 certification. Particularly in the high-temperature interval from 125°C to 150°C, its parameter drift and long-term stability are supported by more comprehensive data validation. The standard version may only guarantee basic functionality at these temperatures, while long-term lifespan and parameter tolerances may not have undergone equally rigorous verification. This difference is critical for applications operating continuously in high-temperature environments.