The BC857C is a SOT-23 (Small Outline Transistor) package Bipolar Junction Transistor (BJT) manufactured by Doeshare. This component is a three-terminal device designed to switch or amplify electrical signals. It is constructed with two P-type and one N-type semiconductor layers for its operation. The BC857C is rated at 300 mW power dissipation at 25°C and comes in an RoHS-compliant, lead-free package. Additionally, its maximum operating temperature is 150°C and its storage temperature is -65 to +150°C. It has low-power, low-frequency, and high-frequency applications and can be used for driving high-side loads and low-side loads, such as LEDs, relays, FETs, and motors.