The Z0103NN0,135 is a two-way thyristor (also known as TRIACs) manufactured by WeEn Semiconductors. It is a surface-mounted device (SMD) with a SOT-223 package and a working voltage of up to 800 V, and it meets RoHS standards for protection of environment and safety. Thyristors are voltage-controlled switches, meaning that the output is turned on or off by either a positive or negative input pulse, whereas in normal power transistors, it takes both a positive and negative pulse. The Z0103NN0,135 is commonly used in switching and controlling applications, such as AC motor control and AC voltage regulation.