The BC857B-7-F is a PNP Bipolar Transistor from Diodes Incorporated, with a maximum collector current of 100 mA and a maximum gain of 300 at Ic=50mA, Vce=5V. It is housed in a SOT-323 package and has a maximum collector-emitter voltage of 40V. It also has a minimum operating temperature of -55°C and a maximum operating temperature of 150°C.