33 AWG (American Wire Gauge) wire specifications: 0.1798 mm diameter, 0.0254 mm² area. Resistance, weight, and common uses.
| Diameter | 0.1798 mm · 0.00708" · 7.08 mils |
| Cross-sectional area | 0.0254 mm² · 50 circular mils |
| Resistance (copper, 20°C) | 678.7639 Ω/km · 206.8872 Ω/1000ft |
| Resistance (aluminum, 20°C) | 1112.73 Ω/km · 339.16 Ω/1000ft |
| Ampacity — copper 60°C | — A |
| Ampacity — copper 75°C | — A |
| Ampacity — copper 90°C | — A |
| Ampacity — aluminum 75°C | — A |
| Weight (copper) | 0.228 kg/km · 0.153 lbs/1000ft |
| Weight (aluminum) | 0.069 kg/km · 0.046 lbs/1000ft |
| Closest IEC 60228 size | 0.0254 mm² actual — smaller than 0.5 mm², the smallest IEC 60228 size |
| 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 |
33 AWG wire (0.1798 mm diameter) is used in precision coil windings, small toroidal inductors, and miniature transformer secondaries. It appears in some hearing aid speakers, micro-motor windings, and electromagnetic sensor coils. It is available primarily as polyurethane or polyester enameled magnet wire.
33 AWG wire has a diameter of 0.1798 mm (179.8 µm), which is roughly 2.6× the thickness of a human hair (about 0.07 mm). Its cross-sectional area is just 0.025399 mm². At this size, the wire is too fragile for manual handling in most cases and is typically wound by machine as enameled magnet wire.