Thomas

These are a common automotive circuit breaker available here at almost any auto parts store and cone in 10 - 50 A in that size. Larger ones are available. They work like a house circuit breaker except that they reset themselves. So if you had a short, they would trip, reset, then trip again until you find the short. But they will also allow you to get where you are going eventually. They are so much better than fusible links that will leave you stranded.