1. Current Rating - RS3DB-13-F: 3A - S2D-E3/5BT: 1.5A - If the load current approaches or exceeds 1.5A, the S2D-E3/5BT will overheat and fail, requiring a reassessment of thermal design and safety margin. 2. Recovery Characteristics - RS3DB-13-F: Fast recovery (trr = 150 ns) - S2D-E3/5BT: Standard recovery (trr = 2 μs) - In high-frequency applications such as switching power supplies, the standard recovery diode will introduce significantly higher reverse recovery losses and voltage spikes, potentially reducing efficiency, worsening EMI, or increasing stress on the switching device. 3. Forward Voltage Drop - RS3DB-13-F: 1.3 V @ 3A - S2D-E3/5BT: 1.15 V @ 1.5A - The former shows a slightly higher drop at its rated current, but a fair comparison must be made under the same current conditions. At 1.5A, the difference may narrow, though current capability remains the primary limitation. 4. Reverse Leakage Current & Junction Temperature Range - Leakage current: RS3DB-13-F’s 5 μA is slightly higher than the 1 μA of the S2D-E3/5BT, which may have a minor impact in high-temperature, high-voltage operation. - Junction temperature range: RS3DB-13-F supports -65°C (wider range), making it suitable for extreme low-temperature environments.