1. Reverse Voltage (Vr): The STPS30H100CW is rated for 100V, compared to 80V for the 30CPQ080. The higher rating provides greater design margin on the high‑voltage side, improving system reliability. Substituting a higher‑voltage part for a lower‑voltage one is electrically safe. 2. Forward Voltage Drop (Vf): At 15A, the STPS30H100CW exhibits a Vf of 800mV, which is 60mV lower than the 30CPQ080’s 860mV. This indicates lower conduction loss, higher efficiency, and reduced junction temperature and thermal design burden. 3. Reverse Leakage Current (Ir): Under rated voltage, the STPS30H100CW’s leakage current is 5µA, significantly lower than the 30CPQ080’s 550µA. The former demonstrates minimal off‑state power loss under high temperature or high voltage, offering better thermal stability—particularly beneficial in high‑temperature environments. 4. Operating Junction Temperature Range: The 30CPQ080 supports a lower temperature limit of –55°C, outperforming the STPS30H100CW’s –40°C. For applications involving extreme low temperatures (e.g., military, aerospace), the original part may be more suitable; this difference is typically negligible in conventional industrial and consumer electronics.