Will coating be generated on the contact surface even in the NC state?
If the contact surface is made of gold or gold alloy, the formation of oxide film is assumed to be less likely.
The contact surface used in the NC state will not be corroded when it is not opened and closed, while it may be corroded around the silver contact. If the contact material is gold alloy, film formation is less likely. However, the operating environment may affect the contact surface differently. Please evaluate it based on the environment, actual equipment and actual load before deciding whether to use the switch.
We recommend the sealed basic switch (IP67) with a microload (0.1 A rating: gold contact) as a type with less coating formation.
Switches Basic Switches
Formation of Oxide Film
Gold Alloy Contact
Sealed Basic Switch
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Switches | DigiKey Electronics
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