1. Reverse Leakage Current (Ir) - PMEG3010EP: 1.5 mA @ 30V - CMS10I30A: 100 µA @ 30V - The leakage current of the CMS10I30A is only 1/15 that of the PMEG3010EP, indicating superior reverse blocking characteristics. This contributes to lower static power loss and reduced thermal dissipation, making it more suitable for high-temperature or low-power applications. 2. Junction Capacitance (Cj) - PMEG3010EP: 170 pF @ 1V, 1MHz - CMS10I30A: 82 pF @ 10V, 1MHz - The CMS10I30A exhibits lower capacitance (measured at a higher test voltage, so the actual performance gap is even more pronounced). This results in better high-frequency switching performance, lower switching losses, and reduced noise, making it suitable for high-frequency switching power supplies or fast signal conditioning circuits. 3. Price & Manufacturer - The CMS10I30A is priced at approximately $0.85, about 2.4 times higher than the PMEG3010EP ($0.36). - Replacement should be justified by weighing the performance benefits against the cost increase. If the application is not sensitive to leakage current or switching frequency, replacement may not be necessary. 4. Package Details - Both devices are offered in SOD-128 packages, but supplier package designations differ (CFP5 vs. M-FLAT). - PCB pad compatibility and thermal design should be verified. The M-FLAT package may offer better thermal performance or have minor structural differences.