1. On-Resistance & Current Capability: The SQM47N10 features an Rds(on) of 24 mΩ (lower than the 27 mΩ of the RSJ400N10) and a higher rated current of 47 A. At identical current levels, this results in lower conduction losses and higher efficiency for the SQM47N10. Alternatively, it can handle a larger continuous current under the same thermal constraints. 2. Gate Charge & Switching Performance: The SQM47N10 has a significantly lower total gate charge (Qg) of 72 nC compared to 90 nC for the RSJ400N10. This indicates faster switching speed and lower switching losses, making it more suitable for high-frequency switching applications. However, it may place higher demands on the transient current capability of the gate driver circuit. 3. Thermal Performance & Power Dissipation: The SQM47N10's maximum power dissipation at the case (Tc) is 136 W, substantially higher than the 50 W rating of the RSJ400N10. This reflects a lower thermal resistance of its package or superior heat dissipation capability. In practice, this enables higher power handling or allows for a more compact heatsink design. 4. Threshold Voltage Test Condition Discrepancy: While both devices specify a Vgs(th) of 2.5 V, the SQM47N10 is tested at 250 µA versus 1 mA for the RSJ400N10. Under marginal drive voltage conditions, this difference in test current may lead to subtle variations in turn-on characteristics. It is therefore essential to ensure the gate drive voltage provides sufficient margin.