The data sheet for a common NPN transistor, the 2N3904, is shown in Figure \(\PageIndex{1}\). Under the maximums we find the device has a maximum power dissipation of 625 mW in free air (ambient tempe...The data sheet for a common NPN transistor, the 2N3904, is shown in Figure \(\PageIndex{1}\). Under the maximums we find the device has a maximum power dissipation of 625 mW in free air (ambient temperature of 25\(^{\circ}\)C), a maximum collector current of 200 mA and a maximum collector-emitter voltage of 40 V. That is, this is not the expected value but is a ratio used to compare \(\beta\) under varying conditions.
