The (often listed under its full manufacturer part numbers QM3966M6 or QM3966M3 ) is a high-performance, fast-switching 30V N-Channel Power MOSFET produced by uPI Semiconductor / UBIQ . Widely integrated into modern consumer electronics, this component is most notably deployed as a core power management switch within the voltage regulator modules (VRMs) of premium gaming laptops, such as the Asus TUF Gaming series.
RDS(on)cap R sub cap D cap S open paren o n close paren end-sub m3966m mosfet verified
Given the marking pattern, the part you are likely looking for is the or M3966 (without the second M) from Alpha & Omega Semiconductor or a compatible Chinese clone. The (often listed under its full manufacturer part