The BC337-40 with Transistors is a NPN (Negative Positive Negative) small signal type device manufactured by LG Electronics (LGE). It is housed in a TO-92, a standardized, surface mount package that is compact and lightweight. The BC337-40 also meets the RoHS (Restriction of Hazardous Substances) guidelines, which require electronics to be manufactured with material that is non-toxic and non-hazardous to the environment. This transistor can be used in a wide variety of applications, including amplifier circuits, switching circuits, and audio applications.