1. Reverse Recovery Time (trr): The US1GFA features 50ns, while the RS1004FL is rated at 150ns. The faster switching speed of the US1GFA results in lower switching losses in high-frequency applications such as switching power supplies and PWM circuits. It also generates smaller reverse recovery current spikes and less electromagnetic interference (EMI). In contrast, the RS1004FL will exhibit higher losses and greater noise under high-speed switching conditions. 2. Reverse Leakage Current and Junction Capacitance: The US1GFA has a relatively high leakage current (5µA) and junction capacitance (20pF). The RS1004FL offers extremely low leakage (1µA) and lower junction capacitance (9pF). This reflects different design trade-offs between the two devices. The US1GFA likely employs a process optimized for rapidly extracting minority carriers to achieve fast recovery, at the expense of some static leakage and capacitance performance. The RS1004FL holds advantages in static power consumption and reduced switching delay (though minor) caused by capacitance, which may be particularly beneficial for low-power standby modes or extremely high-frequency switching where capacitive effects become significant. 3. Manufacturer and Price: The US1GFA is from onsemi (a tier-1 supplier), whereas the RS1004FL is from Panjit (a specialized diode manufacturer with notable cost advantages). The price difference stems primarily from brand premium, the level of performance optimization (especially in trr), and supply chain costs. For cost-sensitive projects where performance requirements are met, the RS1004FL offers high cost-effectiveness.