Home / Products / Molded Case Circuit Breaker (MCCB) / CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
  • CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection
Molded Case Circuit Breaker (MCCB)

CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection

Core Advantages:
Strong Breaking Capacity: 50kA ultimate breaking capacity, quickly interrupting short-circuit faults and protecting the safety of the power distribution system.
Three-Phase Compatibility: The 3340 structure is compatible with three-phase circuits, with clear wiring terminals (top input, bottom output).
Intuitive Status Indication: Clear "ON/OFF" switching indicators, with a red indicator light for fault warning.
Dual-Mode Protection: Thermal tripping for overload protection and magnetic tripping for rapid short-circuit protection, providing bidirectional protection for lines and equipment;
Maximum Durability: Silver alloy contacts + flame-retardant casing, supporting over ten thousand breaking operations for long-term stable operation;
Flexible Installation: Rail-mounted design compatible with standard electrical cabinets, supporting drawer/fixed installation, adapting to different power distribution layouts.
Applicable Scenarios: Factory power distribution cabinets, commercial building HVAC systems, elevator power circuits, and front-end protection for photovoltaic inverters.
Certification: Complies with international/domestic electrical safety standards such as IEC 60947-2 and GB 14048.2. CE certified.
The CHM1-400L/3340 provides reliable thermal-magnetic protection for three-phase power distribution systems with its 400A high current capacity and 50kA high breaking capacity, suitable for core circuits in industrial and commercial applications.

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Category Parameter Interpretation
Model CHM1-400L/3340 Thermal-magnetic molded case circuit breaker (three-pole)
Insulation voltage (Ui) 800V Upper limit of withstand voltage of insulation system
Rated current (In) 400A Long-term current carrying
Disconnection ability Icu=50kA,Ics=35kA Short-circuit fault breaking capacity
Operating voltage (Ue) AC400/690V (speculated) Adaptable to industrial three-phase voltage
Standard GB/T 14048.2、CE National Standards + EU Certification, Quality Compliant


Product Name Model specification Rated current
Molded Case Circuit Breaker (MCCB) CHM1-63L/3300 10、16、20、25、32、40、50、63
CHM1-63M/3300
CHM1-63M/4300A
CHM1-63M/4300B
CHM1-125L/3300 16A、20A、25A、32A、40A、50A、63A、80A、100A、125A
CHM1-125L/4300A
CHM1-125L/4300B
CHM1-125M/3300
CHM1-125M/4300A
CHM1-125M/4300B
CHM1-250L/3300 125A、140A、160A、180A、200A、225A、250A
CHM1-250L/4300A
CHM1-250L/4300B
CHM1-250M/3300
CHM1-250M/4300A
CHM1-250M/4300B
CHM1-400/3300 225A、250A、315A、350A、400A
CHM1-400/4300A
CHM1-400/4300B
CHM1-630/3300 400A、500A、630A
CHM1-630/4300A
CHM1-630/4300B
CHM1-800/3300 630A、700A、800A
CHM1-800/4300A
CHM1-800/4300B
CHM1-1250/3300 1000A、1250A
CHM1-1250/4300A
CHM1-1250/4300B
CHM1-1600/3300 1250A、1600A
CHM1-1600/4300A
CHM1-1600/4300B




Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd. is an OEM/ODM CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection Company and Wholesale CHM1-400L/3340 molded case circuit breaker, 400A, 50kA breaking capacity, three-phase power distribution protection Supplier. Equipped with modern industrial factory buildings and office facilities, we specialize in the production and operation of circuit breakers, dual power supplies (ATS), AC contactors, and other modern low-voltage electrical products. The company implements a complete and scientific quality management system. Through good faith and strong technical capabilities, our products have earned widespread recognition in the industry. ChengXi Electric adheres to a management philosophy of "Integrity, Pragmatism, Science, Rigor, and Solidarity," always focusing on customer needs and dedicated to the field of low-voltage electrical equipment. Relying on the power system and driven by market demands, ChengXi Electric has provided high-quality products and services to a diverse range of users over the years. We continue to expand our market presence, and our products are widely used in numerous domestic sectors, including electric power systems, nuclear power, national defense, petrochemicals, metallurgy, coal, railways, and more. They play a vital role in many national key projects, winning the trust of a growing number of customers and achieving an excellent reputation within the industry. The company always aims at the global technological frontier, focusing on being a trendsetter in low-voltage apparatus. We strive to promote the development and progress of electric power transmission and distribution, aiming to build a first-class international electrical brand. ChengXi is willing to collaborate with partners worldwide to create a brilliant future together.

Certificate

  • ATTESTATION OF CONFORMITY
    ATTESTATION OF CONFORMITY
  • ATTESTATION OF CONFORMITY
    ATTESTATION OF CONFORMITY
  • Business license
    Business license
  • Group standard drafting unit
    Group standard drafting unit
  • AAA-rated credit enterprise
    AAA-rated credit enterprise
  • Wenzhou Enterprise Technology Research and Development Center
    Wenzhou Enterprise Technology Research and Development Center
  • Star Enterprise
    Star Enterprise
  • High-tech enterprises
    High-tech enterprises

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