1. On‑Resistance Test Conditions Differ - STP30N65M5: 139 mΩ @ 11 A; Infineon: 150 mΩ @ 9.3 A (both @ Vgs = 10 V) - ST’s measurement at higher current may give it an advantage in conduction loss at elevated temperatures. Full‑operating‑condition losses should be assessed in conjunction with the temperature coefficient. 2. Switching Performance & Drive Requirements - The STP30N65M5 has a significantly lower Qg (64 nC) than the Infineon part (86 nC), but its Ciss (2880 pF) is higher. - The Infineon device may exhibit lower Miller capacitance at the same Vgs, offering better noise immunity, though its higher Qg requires verification of drive current capability. The ST device is more suitable for high‑frequency switching, but attention must be paid to the impact of Ciss on drive speed. 3. Reliability & Temperature Range - Infineon is AEC‑Q101 qualified with an operating temperature range of –40 °C to 150 °C. ST does not specify automotive qualification, and the lower temperature limit is not clearly stated. - The Infineon part is suitable for automotive or high‑reliability industrial applications, offering better tolerance to cold‑start and temperature cycling. 4. Thermal & Package Design - Infineon’s rated power dissipation is 195.3 W (vs. ST’s 140 W), but actual thermal performance depends on package thermal resistance. The PG‑TO220‑3 package may feature optimized creepage distance or internal bonding. - Under equivalent cooling conditions, the Infineon device may allow higher output power, but PCB layout and insulation requirements must be verified for compatibility. 5. Technology Platform Differences - ST employs MDmesh™ V (a multi‑epitaxial super‑junction structure), while Infineon uses CoolMOS™ CFD7. - CoolMOS CFD7 is optimized for lower reverse recovery charge (Qrr) and improved avalanche ruggedness, which can reduce diode reverse‑recovery losses in hard‑switching topologies. MDmesh V emphasizes a balance between conduction loss and switching speed.