WEG High Capacity Molded Case Circuit Breaker & Air Circuit Breaker

This brochure provides a detailed overview of WEG’s molded case circuit breakers (MCCB) and air circuit breakers (ACB), designed for reliable circuit protection from 20 to 6300 A. It highlights technical specifications, accessory options, electronic protections, communication capabilities, and global certifications.

Key Points


  • Current protection range from 20 to 6300 A with short-circuit breaking capacity up to 120 kA
  • ABW line ACBs designed for high power, low voltage circuits (640–6300 A), available in both fixed and withdrawable versions
  • Communication capability via ProfiBus and ModBus for advanced system integration
  • Certified by CE, UL, and other international standards, ensuring global reliability
  • ACW line MCCBs comply with IEC 60947-2 and UL489 standards and support multiple protection types including thermal, magnetic, and electronic
  • Electronic protection units include LSIG, over/under current, frequency, voltage imbalance, and pre-trip alarms
  • Wide range of plug-in and optional accessories such as motorized operation, undervoltage coils, and mechanical interlocks