The ER1003CT is a RoHS (restriction of hazardous substances) compliant power transistor manufactured by Pingwei that is designed for high power medium voltages applications. It is made of an exposed base metal tab, or copper base, for superior heat dissipation and is enclosed in a New Quadratic Unclassified Data (NQUD) TO-220 package. This transistor is capable of handling up to 130 watts of continuous collector dissipation at a maximum of 25 amperes of collector current, and has a breakdown voltage of 133 volts with a maximum power input of 10 watts. The ER1003CT offers low saturation voltage, making it ideal for audio, switching and amplification circuits. It is able to operate over a wide range of temperatures, from -65°C to 175°C, and its high frequency switching capabilities make it an ideal choice for switching applications.