BUY C3503-E https://www.utsource.net/itm/p/11303357.html

Description: The C3503-E is a NPN Silicon Transistor manufactured by Fairchild Semiconductor. Features: Low Collector-Emitter Saturation Voltage High Current Gain Bandwidth Product High Switching Speed High Reliability Low Noise High Power Dissipation Applications: Audio Amplifiers High Frequency Switching Motor Control Relay Drivers Low Noise Amplifiers High Voltage Switching (For reference only)