.The AD-FMMT591 is a SOT-23 Bipolar Transistor (BJT), manufactured by Changjing Electronics Technology, made with RoHS compliant materials. This BJT is designed for 24-V and is ideal for many applications, including audio, amplifier, switching circuits, and other applications requiring fast switching. This BJT can operate at high frequencies, up to a maximum of 100MHz, with an average power dissipation of 200mW. It has a relatively low on resistance of 180mO, making it a great choice for high-performance applications requiring low power consumption. Additionally, this BJT has a low noise level and is free from second breakdown due to its RoHS construction.