1. Voltage Rating Difference: The IPD80R750P7ATMA1 has a Vdss of 800V, while the IXTY4N65X2 is rated for 650V. In high-voltage topologies (e.g., PFC, switching power supplies), the IXTY4N65X2 may not withstand voltage stress, posing a risk of breakdown, and requires derating. 2. Current Capability Difference: The IPD80R750P7ATMA1 has an Id of 7A, compared to 4A for the IXTY4N65X2. This indicates a lower continuous current capacity for the IXTY4N65X2, which could lead to overheating or reduced lifespan under the same load, especially in high-power applications. 3. On-Resistance (Rds(on)) Difference: The IPD80R750P7ATMA1 has an Rds(on) of 750mΩ (tested at 2.7A, 10V), while the IXTY4N65X2 is 850mΩ (tested at 2A, 10V). Although test conditions differ, the IXTY4N65X2 exhibits a relatively higher Rds(on), resulting in greater conduction loss at the same current and impacting efficiency. 4. Thermal Performance Difference: The IPD80R750P7ATMA1 has a power dissipation rating of 51W, versus 80W for the IXTY4N65X2. This suggests the IXTY4N65X2 offers better thermal management potential, possibly allowing higher operating temperatures or smaller heatsinks. However, due to its lower current capability, the practical advantage must be assessed in the specific application context. 5. Switching Characteristics Difference: The IPD80R750P7ATMA1 has a Qg of 17nC, while the IXTY4N65X2 is 8.3nC. The significantly lower gate charge of the IXTY4N65X2 enables faster switching and lower drive losses, which can benefit high-frequency performance. Note, however, its higher Vgs(th) (5V vs. 3.5V) may require a stronger gate drive voltage to ensure full turn-on.