1. Current capability difference: The rated current of the STPS30H60CFP (15A) is three times that of the MBRF10L60CTG (5A). The latter is only suitable for lower power levels. During substitution, it must be ensured that the actual operating current (including inrush current) remains continuously below 5A with sufficient margin. 2. Implied thermal characteristic differences: Although the packages are identical, the higher current capability of the ST device typically corresponds to lower thermal resistance and operation at a higher junction temperature of 175°C, indicating greater thermal design margin. When substituting, the thermal design must be re-evaluated to ensure reliable operation within the 150°C limit. 3. Dynamic parameter tendencies: The MBRF10L60CTG is specified as part of the SWITCHMODE™ series, with its lower forward voltage drop of 570mV (at 5A) optimized for switching power supply efficiency. However, its reverse leakage current of 220µA is notably higher than that of the ST device (60µA). Under high temperature or high reverse voltage conditions, the static power loss of the substitute component may increase, affecting system efficiency and temperature rise.