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NDB2-63 Series Miniature Circuit Breaker
Updated:August 12,2022 16:10PM

Nader NDB2-63 series MCB is mainly used for short-circuit protection, overload protection, control, isolation and direct current system protection of terminal power distribution system with AC rated working voltage of 230V to 415V, DC rated working voltage of 60V to 125V, rated frequency of 50Hz, rated working current of 1a to 63A and pole number of 1P, 2P, 3P and 4P Certification includes CCC, CE, TUV and UL1077, which are applicable to low-voltage terminal power distribution in industries, civil buildings, energy, communications and infrastructure.
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NDB2-63 Series


Features of NDB2-63 Series

  • Quick closing: To ensure the reliable operation of the impact load and extend the life of the circuit breaker.
  • The product structure can limit the short circuit, thus improving the short circuit breaking capacity.
  • The product structure can limit the short circuit,:thus improving the short circuit breaking capacity.
  • Support a variety of accessories: Easy to expand the functions.
  • Modular: Any combination.


Technology data

Technology data of NDB2-63 Series

Rated Insulated Voltage 500V
Altitude ≤2000m
Ambient temperature -40℃~+70℃
Meet a criterion IEC 60947-1, UL1077
Instantaneous Tripping Characteristic Type B, Type C, Type D
Mechanical Life 20000 times
Electrical Life 20000 times


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Questions & Answers for NDB2-63 Series

  • What is the function of miniature circuit breaker?
    A Miniature Circuit Breaker (MCB) is an automatically operated electrical switch used to protect low voltage electrical circuits from damage caused by excess current from an overload or short circuit.
  • What is miniature circuit breaker how it works?
    A miniature circuit breaker (MCB) automatically switches off the electrical circuit during an abnormal condition of the network means in overload condition as well as faulty condition. Nowadays we use an MCB in a low voltage electrical network instead of a fuse. Handling an MCB is electrically safer than a fuse.
  • What is mean by miniature circuit breaker?
    miniature circuit breaker: a small trip switch operated by an overload and used to protect an electric circuit, esp a domestic circuit as an alternative to a fuse.
  • How does a house breaker work?
    Inside each circuit breaker is a spring hooked over a small piece of solder (a melt-able fusible alloy). Each breaker is connected to an electrical wire that runs through your house. The electricity that flows through your house runs through the solder.
  • What is the advantage of miniature circuit breaker?
    MCB (Miniature Circuit Breaker) is a circuit breaker with optimum protection facilities of overcurrent and short circuit only. Its basic function is to detect the fault condition and interrupt the current flow. it avoids overheating in case of excess current & provides fire protection.
  • What is the difference between MCCB and MCB?
    MCB is miniature circuit breaker which is used to break small currents. Like in domestic LT circuits. The ratings usually end up to 100 A. MCCB is a Module case circuit breaker which has a rugged construction as it can break larger currents usually from (100-1000A).