40 amp 3 pole Miniature Circuit Breaker

Circuit Breaker Information

• Rated Current: 40 amp
• Rated Voltage: 230/400V AC, 50Hz
• Number of poles: 3 pole
• 6 kA short circuit interrupting capacity
• 35mm DIN rail mounted
• It can be manually switched ON and OFF as similar to normal switch if necessary
• Thermal-magnetic overcurrent protection, short circuit protection, with C curve trip characteristic

Technical Data

Circuit Breaker Dimension (Unit: mm)

Details

Tips: How to select a miniature circuit breaker

1. Determine the number of poles of the miniature circuit breaker according to the number of lines to be protected. For example, the general household electricity is single-phase electricity, and the circuit consists of a neutral wire and a live wire. If both lines need to be protected, select two poles. If the neutral line does not need to be protected, choose a single pole.
2. Determine the amperage of the mini circuit breaker according to the line load. For example, if the load capacity of the line is 20A and the rated working current of the electrical appliance is 10A, the circuit breaker selection should be> 10A, <20A.
3. Determine the type of instantaneous protection according to the resistance type of electrical appliances in the loop. There are three types of instantaneous protection, and the corresponding current protection multiples are B: 3~5In, C: 5~10In, D10~14In (In is the rated current). If it's just an incandescent lamp, you can choose type B. Choose type C for general electricity use, and type D for air conditioning protection.