Product description:
    Darlington transistor, also known as composite pipe, is the two bipolar transistors in series to form an equivalent of the new bu, the current magnification is the original two magnification of the product, compared to the general switching transistor, Darlington Transistor drive current is very small, in the drive signal is a weak place is a better choice.
Product Usage:
   The Darlington transistor is typically used to amplify very small signals in highly sensitive amplifiers, such as high-power switching circuits, power amplifiers, and regulated power supplies.
 
   Product parameters:
   IC (A): 4 to 50; Ptot (W): 0.8 to 300; VCEO (V): 50 to 350 hFE? 500