The BC140 transistor in the TO-92 package is a versatile NPN silicon transistor used for medium power amplifier and switching applications. Here are some key specifications:

• Collector Emitter Voltage (VCEO): 40V
• Collector Base Voltage (VCBO): 80V
• Emitter Base Voltage (VEBO): 7V
• Collector Current (IC): 1A
• Power Dissipation: 625mW at 25°C
• DC Current Gain (hFE): 100-160
• Collector Emitter Saturation Voltage (VCE(sat)): 1.0V at IC = 1A, IB = 0.1A