As mentioned above, gold and tin have different surface treatment agent formulations. Gold lubricants are usually based on perfluoropolyether (PFPE) or polyphenylene ether (PPE). Tin lubricants are generally based on hydrocarbons. These fundamentally different bases have different characteristics in terms of temperature capability and environmental stability. Our company provides SSMB connector.
Both high temperature and low-temperature exposure must be considered. The high temperatures will affect the degradation and evaporation rate of the substrate. The high-temperature capability ranges from 120° to 250°C. PFPE substrates will have gel or curing problems at temperatures below 20°C. Despite this concern, PFPE has been successfully used in automotive applications for several years.
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A frequently expressed comment is "lubricant attracts dust." Obviously, lubricants cannot attract dust, but some lubricants may retain dust. It is not clear whether "free" or "retained" dust will have a greater impact on performance.
Connectors can be pre-lubricated, but in some cases, lubricants may be used during product assembly. In this case, the lubricant is an additional assembly step that may cause problems with the presence and quantity of lubricant on the connector.
Some lubricants are silicone-based and are not recommended for use in connector applications due to their high volatility. Silicone film may be deposited on the contact surface, and there are reports that silicone will be converted to silicon dioxide and silicon oxide, in which case silicon dioxide particles will interfere with the performance of the relay-unlikely to appear in the connector.
Insufficient connector design, such as connectors with insufficient contact force or coating thickness, cannot be "preserved" by contact with the lubricant. However, choosing the right contact lubricant can undoubtedly improve the performance and reliability of correctly designed connectors, especially in harsh chemical environments.
The information is provided by the DIN connector factory.