40 amp 3 pole Miniature Circuit Breaker

Cost-effective 3P 40 amp miniature circuit breaker is designed for standard rail mounting and is rated for a 230/400V AC supply. This mini MCB features a 6kA short-circuit breaking capacity and C curve trip characteristic, offering reliable short-circuit and overload protection.

3 Pole MCB Breaker Information

• Rated Current: 40 amp
• Rated Voltage: 230/400V AC, 50Hz
• Number of poles: 3 pole
• 6 kA rated short-circuit breaking capacity
• Compliant with IEC standard
• C curve trip characteristic
• With overload protection and short circuit protection function

Technical Data

3 Pole MCB Breaker Dimensions (Unit: mm)

Details

Tips: How to select a miniature circuit breaker

1. Determine the number of poles of the mini 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 MCB 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, and 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.