The MMBT5551 is a RoHS-compliant NPN transistor manufactured by Changjiang. This part has a maximum current rating of 600 mA and a maximum voltage rating of 160 V. It is packaged in a SOT-23-3 (Surface-mount Plastic) package, making it suitable for automatic pick-and-place process. The MMBT5551 device is ideal for switching and formal amplification applications.