XP ultracapacitors have been specifically developed for applications requiring extra protection against high levels of ambient humidity, which can cause electrolyte vapor leakage and negatively affect PCB surfaces. Under partial humidity test conditions, XP products mitigate this impact at least three times better than equivalent standard Nesscap cells. This provides a significant advantage over other alternatives. The XP series is available in capacitances from 3F to 50F and has been tested to ensure compliance with the most stringent performance and safety standards, including RoHS, UL, and REACH.

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