What this 40 V N-channel MOSFET delivers
The Infineon IRFSL7430PBF is a 40 V N-channel MOSFET in the D2PAK (TO-263) surface-mount package, part of the HEXFET® and StrongIRFET™ series. It switches up to 195 A continuous drain current with a maximum on-resistance of 1.2 mOhm at 100 A, 10 V gate drive — a combination that keeps conduction losses low in high-current power paths like motor drives, DC-DC converters, and battery management systems. Gate charge is 460 nC at 10 V, which sets the gate-driver current requirement and switching loss budget. The junction temperature range spans -55 to 175 °C, so the part handles thermal cycling in industrial or automotive under-hood environments without derating surprises.
Key ratings and what they mean for the BOM
The 460 nC gate charge at 10 V means the gate driver must source and sink a significant charge per cycle. The 375 W power dissipation rating assumes an infinite heatsink; real-world dissipation depends on PCB copper and airflow. The 175 °C junction maximum is the hard limit.
Lifecycle and sourcing posture
The IRFSL7430PBF carries an Active lifecycle status from Infineon, so there is no near-term last-time-buy risk. It is suitable for new designs and production BOMs. The part is RoHS compliant per the lead-free finish (PBF suffix).