With the increasing reliance on electricity in modern society, the widespread application of electrical equipment has become an indispensable part of people's lives. In daily life, household appliances such as televisions, refrigerators, air conditioners, washing machines, and various types of equipment in industrial production that we often use cannot do without the supply of electricity. However, electrical energy also comes with a certain degree of danger, especially in the event of circuit failure, if appropriate protective measures are not taken, it may cause safety hazards such as fire and electric shock. As an important protective device, molded case circuit breakers have become guardians, effectively ensuring the safety of electrical energy.