An international forum for the owners of Catalina 350 sailboats. If you experience any issues, please contact the moderator@catalina350.com or the webmaster@catalina350.com
My electrical panel has several unused breakers on it. If yours is the same, why not just swap the broken one with an unused one.
Open up the panel, and if there's no load wire connected to a breaker then it's unused.
Agree with using a one of the unused switches on the power panel as your spare. Probably one-quarter of the switches on my panel have no output and would be considered a "spare".