Convert Degree Celsius per milliwatt to Degree Fahrenheit per watt
Convert Degree Celsius per milliwatt (°C/mW) to Degree Fahrenheit per watt (°F/W) instantly and accurately.
Conversion Formula
°F/W = °C/mW × 1800
About Degree Celsius per milliwatt
The degree Celsius per milliwatt (°C/mW) equals exactly 1000 K/W since 1 mW = 10⁻³ W and 1 °C = 1 K. Widely used in low-power semiconductor datasheets for characterising junction-to-ambient resistance: small-signal transistors, LEDs, photodiodes, and SMD resistors typically show RθJA of 50-500 °C/mW. A device at 200 °C/mW dissipating 5 mW rises 1 °C. 1 °C/mW = 1000 K/W = 1 kK/W.
About Degree Fahrenheit per watt
The degree Fahrenheit per watt (°F/W) equals exactly 5/9 K/W ≈ 0.5556 K/W. It appears in US power electronics datasheets and legacy JEDEC thermal specifications where junction-to-case resistance is reported in °F/W rather than °C/W or K/W. A device rated 5 °F/W has R = 5 × 5/9 ≈ 2.78 K/W. 1 °F/W = 5/9 K/W.
Quick Reference Table
| Degree Celsius per milliwatt (°C/mW) | Degree Fahrenheit per watt (°F/W) |
|---|---|
| 1 °C/mW | 1800 °F/W |
| 2 °C/mW | 3600 °F/W |
| 5 °C/mW | 9000 °F/W |
| 10 °C/mW | 18000 °F/W |
| 25 °C/mW | 45000 °F/W |
| 50 °C/mW | 90000 °F/W |
| 100 °C/mW | 180000 °F/W |