1. Certification: The PDZ7.5B-AU_R1_000A1 is explicitly marked “Grade: Automotive” and complies with the AEC‑Q101 standard. This model has undergone a complete set of reliability stress tests tailored for automotive applications—such as more stringent temperature cycling, humidity life, and highly accelerated stress testing—ensuring higher reliability assurance and lot‑to‑lot consistency. The PDZ7.5B_R1_00001 lacks this certification. 2. Application Threshold: This distinction directly determines the device’s eligibility for use. In automotive electronics or any high‑reliability field that requires component traceability and certified assurance, an AEC‑Q101 qualified model must be used. Where such requirements are absent, the non‑certified variant may be employed to reduce cost.