1. Recovery Speed & Type: The MURA260T3G is a fast recovery diode (75ns), whereas the 1N4005G is a standard recovery diode (>500ns). The MURA260T3G is suitable for high-frequency switching circuits (e.g., switch-mode power supplies, PWM rectification), where it can significantly reduce switching losses and noise. In contrast, the 1N4005G is intended only for low-frequency applications such as line-frequency (50/60Hz) rectification. This is the most critical factor determining substitution feasibility. 2. Rated Current & Forward Voltage: The MURA260T3G has a higher rated current (2A) compared to the 1N4005G (1A). However, its forward voltage drop at the rated current is also higher (1.45V @ 2A). At the same 1A operating current, the MURA260T3G may exhibit lower conduction loss (as it is not fully loaded) and provide greater margin. However, if used in applications approaching 2A, its power dissipation will increase significantly, necessitating a review of thermal management. 3. Package & Mounting: The MURA260T3G utilizes a surface-mount (SMA) package, while the 1N4005G employs an axial-leaded through-hole (DO-41) package. This represents a fundamental change in manufacturing process (reflow soldering vs. wave soldering/hand soldering) and also affects the thermal path. The SMA package relies on PCB copper for heat dissipation, imposing requirements on board layout and thermal design. The through-hole package can dissipate heat via its leads and air convection. 4. Operating Junction Temperature Range: The MURA260T3G offers a wider junction temperature range (-65°C to 175°C) than the 1N4005G (-55°C to 150°C). This enables more reliable operation in harsher thermal environments, providing additional margin on the high-temperature side, which is advantageous for high-density or high-ambient-temperature applications.