1, Molded case circuit breakers can access thicker wires, such as more than 35 square meters. Miniature circuit breakers are only suitable for conductors up to 10 square feet.
 

2, the end of the molded case circuit breaker is connected with the nut, it is easy to press tightly, and the contact is good. Miniature circuit breakers use smaller crimping terminals and can only be tightened with a screwdriver. The torque is not enough and it is not easy to compress. The contact is not very good.
 

3. Molded case circuit breakers are protected by over-current and short-circuit using two devices, and the over-current protection action value can be manually adjusted. Miniature circuit breakers share a device for overcurrent and short circuit, and the current is not adjustable.
 

4. Molded case circuit breakers have a large distance between them, arc extinguishing covers, and strong arc extinguishing ability. They can withstand larger short-circuit currents and are less likely to cause phase-to-phase short circuits. Life is also long.
 

5. The sensitivity of miniature circuit breakers is higher than that of molded case circuit breakers.