The KLIXON® S series The KLIXON® S series thermal breakers are designed thermal breakers are designed to protect wiring and meet the to protect wiring and meet the harshest environmental harshest environmental requirements. The sealed requirements. The sealed circuit breakers are circuit breakers are weatherproof for protection weatherproof for protection against moisture, dust, against moisture, dust, grease, fuel vapors and other grease, fuel vapors and other harsh environments. The S harsh environments. The S series breakers are series breakers are lightweight and designed to lightweight and designed to interrupt short circuits or interrupt short circuits or overloads and combine overloads and combine trip-free protection with fast trip-free protection with fast response time. response time.