1. Current Rating and Forward Voltage Drop The RB228NS100TL has a higher rated current (15A vs. 10A), theoretically providing greater margin. However, its forward voltage drop is specified as 870mV @ 5A, compared to 770mV @ 10A for the MBRB20H100CTT4G. Under the same high-current operating conditions, the Rohm device may exhibit higher conduction losses and junction temperature, necessitating a re-evaluation of the thermal design. 2. Reverse Leakage Current and Maximum Junction Temperature The RB228NS100TL has a significantly higher reverse leakage current (150µA vs. 4.5µA @ 100V) and a lower maximum junction temperature (150°C vs. 175°C). This indicates that in high-temperature, high-voltage operating scenarios, the static power dissipation of the Rohm device could be notably higher, and its thermal safety margin is reduced. It is therefore unsuitable for designs sensitive to leakage or intended for high-temperature environments. 3. Application Grade The RB228NS100TL is AEC-Q101 qualified for automotive use. It meets automotive electronic standards for reliability, consistency, and temperature cycling lifetime, making it suitable for more demanding automotive or industrial environments. The onsemi device is a standard industrial-grade component. 4. Series Characteristics The MBRB20H100CTT4G belongs to onsemi's "SWITCHMODE™" series, which is typically optimized for switching power supply applications with soft recovery characteristics and improved noise performance. It may offer superior EMI performance in high-frequency switching scenarios. Summary and Recommendation: For general-purpose mid-to-low frequency power applications with relaxed requirements for efficiency and high-temperature operation, the RB228NS100TL can be a direct substitute, offering better current margin and automotive-grade reliability. For high-frequency switching power supplies, high-temperature environments, or designs with strict efficiency and leakage current requirements, it is advisable to retain the original part or conduct practical validation testing.