Technicians frequently replace a set of 14 standard capacitors that often bulge or leak over time. Troubleshooting Tips
Most evidence points to an N-Channel MOSFET. However, some low-cost chargers use a bipolar NPN transistor with the same marking. To be sure, test the component with a multimeter in diode mode: a BJT will show two diode junctions (B-E and B-C); a MOSFET will show one body diode (D-S) and open circuit G-S. Yp2632t Schematic