Before you use a transistor or any other component in your design or circuit, make sure you know the component's safe operating standards as well as its absolute maximum ratings. It's also crucial to realize that utilizing a component at its absolute maximum ratings puts it under stress, which can result in permanent damage, weakening, or lowering its life span. Therefore, we recommend using a component that's at least 20% below its absolute maximum ratings.
As a result, the 2SC4793 transistor is in the same boat. Because the transistor's maximum collector current is 1A, do not drive loads that draw more than 800mA. Because the maximum collector to emitter voltage is 230V, never drive a load greater than 180V and always store and operate the transistor between -55°C and +150°C.