Datasheet for the AO4407A from Alpha and Omega Semiconductor, a 203 KB PDF. The AO4407A is a P-channel MOSFET in SO-8 housing, often used on notebook motherboards as an adapter or battery switch and for gating power rails. Inside are the pin arrangement, threshold voltage, on-resistance figures and safe operating limits. Technicians rely on it to verify gate drive levels, locate the drain pins when hunting a short on the input rail, and confirm that a substitute P-channel part matches voltage and current ratings.
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