Coating parts is optional for those components that require a higher dielectric resistance, resistance to chipping, or a smooth winding surface.
Fair-Rite offers Parylene coating for select parts. This colorless conformal coating is used on smaller parts due to its higher cost but minimal coating thickness. Fair-Rite currently uses Paralyne-C material:
|Dielectric Strength||5600 V/mil|
|Volume Resistivity||8.8 x 1016 ohm-cm|
|Surface Resistivity||1014 ohm|
|Dielectric Constant (1 MHz)||2.95|
|Dissipation Factor (1 MHz)||0.013|
|Water Absorption (24 hours)||< 0.1%|
|Coefficient of Friction||0.29|
|Continuous Operating Temperature||<100°C|
|Thermal Conductivity||2.0 x 10-4 cal/sec/cm/°C|
|Maximum Operating Temperature||<160°C|
Thermo Set Plastic Coating
Fair-Rite also offers the ability to coat parts with epoxy. Due to the minimum coating thickness of 0.005”, this method is reserved for parts that are larger in size (diameters > 9mm).
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