SMD triode conventional specifications 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 the more conventional models. If you need other models, please contact Pingshang Technology Our chip triode 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 role of the chip triode includes: 1. Commonly used for voltage amplification and current amplification; 2. Dominate the oscillator circuit 3. Use as an electronic switch 4. Play the role of impedance change 5. Use as a variable resistor