1. Voltage & Current Ratings: The STTH302 (200V/3A) is rated higher than the EGP20B (100V/2A), offering greater design margin and reliability in high-voltage, high-current scenarios. However, its DO-201AD package is typically slightly larger than the DO-15 package of the EGP20B, so physical clearance must be verified. 2. Reverse Recovery Time (trr): The STTH302 has a trr of 35ns, compared to 50ns for the EGP20B. The shorter trr may result in lower switching losses and noise in high-frequency switching circuits (e.g., SMPS rectification), giving the STTH302 a slight efficiency advantage. 3. Junction Temperature Range: The STTH302 has a maximum junction temperature of 175°C, which is higher than the EGP20B's 150°C. This indicates better thermal reliability for the STTH302 in high-ambient-temperature or poor-heat-dissipation environments, making it more suitable for compact or high-temperature designs. 4. Leakage Current & Capacitance: The STTH302's leakage current (3µA at 200V) is lower than the EGP20B's (5µA at 100V), suggesting potentially better PN junction quality. The EGP20B specifies a junction capacitance (70pF), while the STTH302 does not provide this parameter. In high-frequency applications, attention should be paid to possible capacitance effects on transient response.