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A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?
- a)70.6W
- b)61.5W
- c)37.8W
- d)56.9W
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A silicon power transistor is operated with a heat sink HS-A=1.5°C...
PD=(TJ-TA)/ HJ-C +HC-S +HS-A
=200-40/0.5+0.6+1.5=61.5W.
=200-40/0.5+0.6+1.5=61.5W.
Most Upvoted Answer
A silicon power transistor is operated with a heat sink HS-A=1.5°C...
The heat sink HS-A value of 1.5 indicates the thermal resistance between the transistor junction and the ambient environment, measured in degrees Celsius per watt (°C/W). This value represents the ability of the heat sink to dissipate heat generated by the transistor.
To calculate the temperature rise of the transistor, you would need to know the power dissipated by the transistor and the ambient temperature.
The formula to calculate the temperature rise is:
Temperature Rise (ΔT) = Power Dissipated (Pd) x Heat Sink Thermal Resistance (HS-A)
For example, if the power dissipated by the transistor is 2 watts and the ambient temperature is 25°C, the temperature rise would be:
ΔT = 2W x 1.5°C/W = 3°C
So, the temperature of the transistor would rise by 3°C above the ambient temperature.
To calculate the temperature rise of the transistor, you would need to know the power dissipated by the transistor and the ambient temperature.
The formula to calculate the temperature rise is:
Temperature Rise (ΔT) = Power Dissipated (Pd) x Heat Sink Thermal Resistance (HS-A)
For example, if the power dissipated by the transistor is 2 watts and the ambient temperature is 25°C, the temperature rise would be:
ΔT = 2W x 1.5°C/W = 3°C
So, the temperature of the transistor would rise by 3°C above the ambient temperature.
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A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer?.
A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A silicon power transistor is operated with a heat sink HS-A=1.5°C/W. The transistor rated at 150W (25°C) has HJ-C=0.5°C/W and the mounting insulation has HC-S=0.6°C/W. What maximum power can be dissipated if the ambient temperature is 40°C and (TJ)MAX=200°C?a)70.6Wb)61.5Wc)37.8Wd)56.9WCorrect answer is option 'B'. Can you explain this answer?.
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