1. Reverse Leakage Current (Ir @ Vr): MCC's specification (5 µA) is approximately half that of onsemi (10 µA). Under high-temperature or high-reverse-voltage conditions, the MCC device exhibits slightly lower static power dissipation and theoretically superior blocking characteristics. However, this difference has negligible practical impact in most line-frequency rectifier circuits. 2. Reverse Recovery Time (trr) & Junction Capacitance Specification: MCC explicitly specifies trr (2 µs) and junction capacitance (15pF @ 4V), while onsemi does not provide specific values. This indicates MCC offers clearer guarantees on dynamic switching parameters. For designs with minor switching frequency requirements or EMI considerations, MCC's data facilitates easier assessment. For pure 50/60Hz rectification, this difference is irrelevant. 3. Junction Temperature Range (Tj): onsemi's allowable range (-65°C ~ 175°C), particularly its upper limit, is wider than MCC's (-55°C ~ 150°C). Under identical environmental or thermal conditions, the onsemi device theoretically offers greater thermal margin. This may provide a slight advantage in long-term reliability under high-temperature operation, especially in sealed or high-ambient environments. Summary: The core electrical specifications (Vr, Io, Vf) and package are identical. Differences lie in the manufacturers' level of guarantee for secondary parameters (leakage current, dynamic characteristics) and the temperature range. For general-purpose rectification, these differences typically do not prevent substitution. However, if the application involves extreme temperatures or is sensitive to switching noise, a targeted evaluation based on these specific differences is recommended.