1. Forward Voltage (Vf): MURA160T3G is 1.25 V @ 1 A, while US1J‑E3/61T is 1.7 V @ 1 A. At rated current, the US1J exhibits approximately 36% higher conduction loss, leading to greater operating temperature rise and reduced system efficiency. This may introduce thermal challenges in compact or thermally constrained designs. 2. Reverse Leakage Current (Ir): MURA160T3G is 5 µA @ 600 V, compared to 10 µA @ 600 V for the US1J‑E3/61T. The US1J’s leakage current is twice as high, resulting in slightly higher static power dissipation and inferior thermal stability under high‑temperature or near‑rated‑voltage operation. This could affect performance in high‑voltage or low‑power circuits. 3. Junction Temperature Range (Tj): MURA160T3G is rated for –65 °C to 175 °C, whereas US1J‑E3/61T is specified from –55 °C to 150 °C. The MURA160T3G offers an additional 25 °C margin at the high‑temperature end, making it more suitable for high‑temperature, high‑reliability environments such as industrial or automotive applications. Its lower low‑temperature limit also supports operation in extreme conditions. 4. Dynamic Characteristics: Although both devices are rated with a nominal reverse recovery time (trr) of 75 ns, the MURA160T3G is explicitly classified as “Fast Recovery,” while the US1J is labeled “Standard.” Implicit differences in actual switching behavior—such as softness factor and temperature dependence—may exist. In high‑frequency switching applications (e.g., SMPS), the switching losses and noise performance of the US1J should be verified.