1. Core Conduction Performance & Current Capability Rds(on) and Id: The Rds(on) of the PSMN3R9 (3.9 mΩ) is significantly lower than that of the STP130N6F7 (5 mΩ), and its rated continuous current (130 A) is substantially higher than the latter’s (80 A). Under the same current, the PSMN3R9 exhibits lower conduction loss, reduced temperature rise, and can sustain higher steady‑state current loads. The STP130N6F7 represents a performance downgrade in this aspect. 2. Dynamic (Switching) Performance Gate Charge (Qg) & Input Capacitance (Ciss): Both Qg (42 nC) and Ciss (2600 pF) of the STP130N6F7 are considerably lower than those of the PSMN3R9 (103 nC, 5600 pF). In switching applications, the STP130N6F7 requires less drive power, achieves faster switching speed, and significantly reduces switching losses. This is a key advantage for higher‑frequency applications such as DC‑DC converters. 3. Thermal Performance & Power Handling Maximum Power Dissipation: The PSMN3R9’s 263 W rating exceeds the 160 W of the STP130N6F7. This is consistent with its lower Rds(on), indicating it can handle higher power under equivalent cooling conditions or operate at a lower junction temperature under high power. When substituting, thermal design must be re‑verified to ensure the STP130N6F7’s temperature rise remains within safe limits. 4. Technology & Cost Positioning The parameter differences reflect distinct technical emphases: the PSMN3R9 is optimized for on‑resistance, targeting ultimate conduction performance, whereas the STP130N6F7 (utilizing STripFET F7 technology) achieves a better balance between on‑resistance and gate charge, emphasizing overall switching performance and cost. The price difference (approximately 3×) directly reflects this performance‑versus‑cost trade‑off.