Features 1、Have high dielectric strength, fast switching speed, high power consumption, and excellent current performance. 2、Excellent choice for DIY. Each transistor model is clearly labeled for easy identification, convenient to use. 3、10 models, including BC327 PNP, BC337 NPN, BC517 NPN, BC547 NPN, BC548 NPN, BC549 NPN, BC550 NPN, BC556 PNP, BC557 PNP, BC558 PNP. 4、Widely used in electric vehicles, smart home security monitoring, communication transmission, electrical power supply and so on. 5、High quality power transistor kit, made of high quality semiconductor material, having stable performance. Specification Item Type: Transistors Material: Semiconductor Model: BC327 PNP BC337 NPN BC517 NPN BC547 NPN BC548 NPN BC549 NPN BC550 NPN BC556 PNP BC557 PNP BC558 PNP Package List 200 x Transistors (Each model has 20pcs)