Magnet Wire Selection
Magnet wire is insulated with an enamel coating to allow coil windings to touch each other without conducting electricity between layers. Various enamels have different temperature ratings:
- UL consideration- 155C (MW 80), 180C (MW 77) 200 C (MW 35 or 74) and 220C (MW 16). Temperature refer to 20,000 hours of continuous duty operations per ASTM D2307
- 5 AWG to 48 AWG
- Enamel comes in Single coat - most common
for wire sizes finer than 12 or Heavy coat
for stress conditions
- Bondable coating can be added to the wire where no bobbin will be used
- Litz Wire- special coating for high frequency conditions
- 200C and 220C require additional manual stripping
the ends for soldering
Lead Wire or Terminal Selection:
- UL Considerations - Temperature classifications
- Terminals in bobbin helps in design for
automation
- Terminal bobbin can also be used with lead wire
- Operating Moisture and temperature requirements
- See Engineering department when considering Teflon
leads in moisture environment for encapsulated coil
Quality
Assurance 