40 AWG (American Wire Gauge) wire specifications: 0.0799 mm diameter, 0.005 mm² area. Resistance, weight, and common uses.
| Diameter | 0.0799 mm · 0.003145" · 3.14 mils |
| Cross-sectional area | 0.005 mm² · 10 circular mils |
| Resistance (copper, 20°C) | 3440.8696 Ω/km · 1048.777 Ω/1000ft |
| Resistance (aluminum, 20°C) | 5289.0397 Ω/km · 1612.0993 Ω/1000ft |
| Ampacity — copper 60°C | — A |
| Ampacity — copper 75°C | — A |
| Ampacity — copper 90°C | — A |
| Ampacity — aluminum 75°C | — A |
| Weight (copper) | 0.045 kg/km · 0.03 lbs/1000ft |
| Weight (aluminum) | 0.014 kg/km · 0.009 lbs/1000ft |
| Closest metric size | 0.0 mm² |
| Skin depth at 60 Hz | 8.531 mm |
| Type | Temperature | Description |
|---|---|---|
| PVC | 60-105°C | General purpose insulation |
| Teflon (PTFE) | 200°C | High temperature applications |
| Silicone | 200°C | Flexible, high temperature |
| Enamel | 155-220°C | Magnet wire coating |