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For the 2N 338 transistor, the manufacturing specifies Pmax = 100 mW and 25°C free air temperature and the maximum junction temperature Tjmax = 125°C, its thermal resistance is—
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- 10°C/W
- 100°C/W
- 1000°C/W
- 10,000°C/W
Correct Option: C
Given,
Pmax = 100 mW
Tambient = 25°C
Ti(max) = 125°C
θ = thermal resistance =?
| From relation θ = | = | 125 - 25 | Pmax | 100 mW |
| = | °C/W | 100 x 10-3 |
or θ = 1000 °C/W
Hence alternative (C) is the correct choice.
