bd 303Inchange Semiconductor Company Limited's BD303 is a trans gp bjt npn 60v 8a 55000mw 3-pin (3+tab) to-220c. in the bipolar transistors, gp bjt category. Check part details,Description: isc Silicon NPN Power Transistor. 3 Results. Part #: BD303N. Datasheet: 1MbKb3P. Manufacturer: Thinki Semiconductor Co., Ltd..