The IRFR9120NTRLPBF is a 100 V P-channel MOSFET from Infineon's HEXFET family, rated for 6.6 A continuous drain current at 25°C case temperature. Packaged in a surface-mount D-Pak (TO-252), it is designed for high-side load switching, battery protection, and DC-DC converter applications where a positive supply rail needs to be switched off. The P-channel polarity simplifies gate drive — no charge pump needed when the source is tied to the positive rail — making it a common choice for automotive body controllers, industrial solenoid drivers, and power management in telecom line cards.
The 27 nC gate charge at 10 V keeps gate-drive losses manageable in PWM applications switching at tens of kilohertz; input capacitance of 350 pF at 25 V Vds means the driver sees a moderate load, compatible with most gate-driver ICs.
