What is the maximum ambient operating temperature that must be indicated on the galvanic isolator?

The maximum ambient operating temperature that must be indicated on a galvanic isolator is 50 °C. This specification is crucial because galvanic isolators are designed to protect electrical systems on boats from galvanic corrosion, which occurs when dissimilar metals are connected in an electrical circuit in the presence of an electrolyte, such as seawater.

It’s important for a galvanic isolator to function effectively within specified temperature ranges to ensure reliability and safety in marine environments. Operating above 50 °C could potentially degrade the isolator's performance or damage its internal components. Therefore, indicating a maximum operating temperature of 50 °C helps ensure that users are aware of the limitations and can maintain safe operating conditions, which is critical for the longevity of electrical equipment onboard a vessel.

The other temperature options presented do not align with the standards required for galvanic isolators, emphasizing the necessity of adhering to the established threshold to prevent electrical failures or safety hazards in marine applications.