Molded case circuit breakers can automatically turn off the current after the current exceeds the trigger setting. Plastic housing refers to the use of plastic insulators as the outer housing of the device to insulate the conductors and the grounded metal parts.                                                                 

There are different rated currents such as plastic enclosure switches, and those above 10 A are mainly used in industry.  In industrial power supply circuits, it is difficult to use fuses for circuit protection when the importance of the circuit is slightly higher, or the protective properties of fuses cannot be met.  Molded case circuit breakers can be used when the circuit requires it.  Molded case circuit breakers are circuit breakers commonly used in factories.