SEZC 3P 250A(F) Molded Case Circuit Breaker

SMEZC Series Molded Case Circuit Breakers are medium – and high – voltage protection devices suitable for industrial and commercial power distribution systems. Specifically designed for AC 50/60Hz circuits, the rated voltage can reach up to 690V AC. This series of circuit breakers integrates thermal – magnetic tripping technology and current – limiting function, and is widely used in power distribution protection, motor control, and terminal equipment protection scenarios, providing reliable overload, short – circuit, and undervoltage protection.

Core Performance Features

• High Reliability and Safety

• The use of thermal – magnetic trippers enables rapid response and precise protection, preventing circuit overload and short – circuit faults.
• The double – insulation design ensures the safety of operators during normal operation.
• The standard protection level is IP20, and it can be upgraded to IP54 when installed in an electrical cabinet with special accessories.
  • Compact Structure and Flexible Installation
• The fixed – type installation design saves space in the power distribution cabinet and facilitates dense layout.
• It supports vertical or horizontal installation to adapt to different installation environment requirements.
• The manual operating handle intuitively indicates the on – off state of the circuit breaker.
  • Wide Adaptability to Working Environments
• Altitude requirement: The installation height should not exceed 2000 meters.
• Temperature range: From – 5°C to + 40°C, and it can withstand humid, salt – fog, oil – fog, and mildew – fog environments.
• There is no requirement for protection against rain and snow. It is suitable for industrial workshops, power distribution rooms, etc.
  • Standardization and Certification
• Complies with the ISO9001 quality management system certification, ensuring the stability of the product manufacturing process.
• Suitable for terminal power distribution, motor protection, and industrial control systems.

Technical Parameters

Typical Application Scenarios

• Industrial Field: Production line power distribution, motor control cabinets, capacitor bank protection.
• Commercial Buildings: Lighting circuits, air – conditioning systems, elevator control.
• Special Environments: Chemical plants, ports, railway tunnels, and other places with corrosive gases or a humid environment.