WEE Technology Company Limited
We are WEE, We Enhance Efency
What are Small Signal Transistors?
As a design note, small signal transistors are used primarily when amplifying small signals, such as a few volts and only when using milliamperes of current.
small signal transistors come in NPN and PNP forms, are used to amplify low-level signals, can also be used as a switch.
Typical hFE values range from 10 to 500, with maximum Ic ratings from about 80 to 600mA.
Maximum operating frequencies range from about 1 to 300 MHz.
Popular small signal transistors: https://weetcl.com/Small_Signal_Transistors/ 
SOT-23(TO-236) MMBT9018 (MMBT9018G, MMBT9018H) NPN Silicon Epitaxial Planar Transistors 30V Small Signal Bipolar (BJT) Transistors
Spec.: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT9018.pdf 

Skype, Email: info@weediode.com
Written by WEE Technology Company Limited