A transistor with a height of 0.4 cm and a diameter of 0.6 cm is mounted on a circuit board as shown in Figure 5. The transistor is cooled by air flowing over it with an average heat transfer coefficient of 30 W/m?.K. If the air temperature is 55°C and the transistor case temperature is not to exceed 70°C, determine the amount of power this transistor can dissipate safely. Disregard any heat transfer from the transistor base. Air 55°C Power transistor 0.6 cm Ts<70°C 0.4 cm

A transistor with a height of 0.4 cm and a diameter of 0.6 cm is mounted on a circuit board as shown in Figure 5. The transistor is cooled by air flowing over it with an average heat transfer coefficient of 30 W/m?.K. If the air temperature is 55°C and the transistor case temperature is not to exceed 70°C, determine the amount of power this transistor can dissipate safely. Disregard any heat transfer from the transistor base. Air 55°C Power transistor 0.6 cm Ts<70°C 0.4 cm