The conventional specifications of SMD transistors include: Package: SOT-23 model: S9012, S9013, S9014, S9015, S9018, S8050, S8550, SS8050, SS8050 MMBT3904, MMBT3906, MMBT4401 MMBT5551, MMBT5401, MMBT2222, MMBT2907, MMBT2907A, MMBTA42 MMBTA43, MMBTA44, MMBTA55, MMBTA56, MMBTA64, MMBTA92, MMBTA93, MMBTA94, etc. The above are more conventional models, if you need other models, please contact Pingshang Technology Our patch transistor products are mainly used in: 1. Power Products 2. Lighting equipment 3. Automotive Electronics 4. Medical equipment 5. Intelligent products 6. Network communication equipment 7. Instrumentation The functions of the patch transistor include: 1. Commonly used for voltage amplification and current amplification; 2. Leading the formation of the oscillation circuit 3. Use as an electronic switch 4. Play the role of impedance change 5. Use as a variable resistor Welcome friends who are interested to consult online