The STD123S is a SOT-23 Bipolar Transistors - BJT ROHS manufactured by Changjing Electronics Technology. This bipolar transistor is especially well suited for low voltage, low-power applications such as amplifiers, switches, and signal processing circuits. It has an incredibly small footprint with power dissipation that reaches up to 500mW for static operations. The STD123S has a wide operating current range of up to 50mA, and an exceptionally high hFE range of up to 480. It is rated to operate at a maximum voltage of 30V, making it ideal for applications requiring high performance in low profile designs. It is also RoHS compliant, making it safe for use in industrial, medical, and consumer products.