1. Reverse Leakage Current (Ir) - STPS2H100AF: 1 µA @ 100 V - B2100AF-13: 10 µA @ 100 V - The ST device exhibits an order-of-magnitude lower leakage current, resulting in reduced power dissipation and higher efficiency, particularly in static-power-sensitive or high-temperature applications. 2. Operating Junction Temperature Range - STPS2H100AF: -65°C to 175°C - B2100AF-13: -55°C to 150°C - The ST part offers a wider junction temperature range, with a 25°C improvement on the high-temperature end. This indicates superior thermal reliability, making it suitable for harsher ambient conditions or applications with limited thermal headroom. 3. Qualification Status - The STPS2H100AF is AEC-Q101 qualified, while no such automotive-grade certification is indicated for the B2100AF-13. - AEC-Q101 certification ensures the ST device meets stringent automotive requirements for temperature cycling, humidity, and long-term reliability, making it suitable for automotive or high-reliability industrial applications. 4. Cost and Supplier - The STPS2H100AF is priced lower ($0.37 vs. $0.46) and is sourced from a mainstream automotive-grade supplier. - This provides a cost advantage alongside the performance improvements. ST’s established supply chain and automotive experience may also offer more stable long-term supply support. Replacement Considerations: Beyond the direct performance benefits, note that the package footprints are compatible (both SMAF/SMAflat type). However, it is recommended to verify that the PCB land pattern aligns perfectly. For high-frequency applications, switching characteristics should be validated experimentally; although the rated speeds are similar, parasitic parameters could introduce subtle differences.