gobagee 2 Pics BT136 Triac Electronic Components Electronic Hobby Kit NPN Transistor  (Number of Transistors 2)

The BT136 is with 4A maximum terminal current. The gate threshold voltage of the BT136 is also very less so can be driven by digital circuits. Since TRIACs are bi-directional switching devices they are commonly used for switching AC applications. So if you looking to switch of control (dim, speed control) an AC load which consumes less than 6A with a digital device like microcontroller or microprocessor then BT136 might be the right for you. Applications AC Light dimmers Strode lights AC motor speed control Noise coupling circuits Controlling AC loads using MCU/MPU Ac/DC Power control