The Z0103NN5AA4 Triac with STMicroelectronics is an industrial-grade, medium-voltage, medium-current bidirectional thyristor switch component used in AC power control applications. It is specially designed to provide high-current and medium-voltage switching, with an on-state current of up to 5A and a RMS blocking voltage of 400V. It is well suited for use in motor speed control, lighting, lamp ballast, temperature control, and other related applications. This component is manufactured by STMicroelectronics, one of the leading semiconductor manufacturers in the world.