The MMBT5551 (NPN/PNP) with Transistors SOT-23 (SOT-23-3) RoHS manufactured by Microdiode Electronics is a surface-mount dual complementary low voltage transistor. It can be used for switching and controlling current flow in a wide variety of printing, communication and electronic equipment. This device offers low on-state resistance and is ideal for use in audio stages, switches, LED driving stages, relay drivers and line drivers etc. This device comes with a SOT-23-3 package and is compliant with RoHS standards. It has a wide operating voltage range from 45V to 150V and a maximum collector dissipation of 500mW at 25°C. It is designed to handle high-speed switching applications, and offers low-noise characteristics and low distortion. Further, it has an insulated potted package which provides superior thermal performance and reliable operation in high temperature applications.