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Air Circuit Breaker 4012

Air Circuit Breaker 4012

Many new standard features include RMS sensing, ground-fault detection, real-time state monitoring, bidirectional communications, control functions, under-voltage dropout, under-voltage lockout, power-up trip, charging motor protection and more.

Air Circuit Breaker 4012

Electronic Over Current Protection

By integrating electronic over current protection in the air circuit breakers, L3Harris eliminates the need for costly over current assemblies. This flexibility provides simplified ordering, application versatility, reduced parts inventory and reduced maintenance, resulting in manpower savings.

Featured News

The Mobile User Objective System (MUOS)

Editorial | 06. 22. 2026

L3Harris’ NSA-Certified Crypto Keeps MUOS Battle-Ready for the Long Haul

L3Harris has upgraded the Mobile User Objective System (MUOS) with a newly NSA-certified Transmission Security Controller, enhancing the U.S. Department of Defense's satellite network's security, resilience, and longevity by 15 years, ensuring robust, secure communications for military operations.

The Mobile User Objective System (MUOS)

Editorial | 06. 22. 2026

L3Harris’ NSA-Certified Crypto Keeps MUOS Battle-Ready for the Long Haul

Ship with Polish flag cuts through water

Press release | 05. 06. 2026

L3Harris to Boost Polish Navy Combat Power with Advanced Ship System

Virginia-class sub at sea

Editorial | 05. 05. 2026

L3Harris Provides Key Technologies for Newly Commissioned Navy Submarines

Coast Guard at sea

Editorial | 04. 20. 2026

Protecting America's Shores: L3Harris Keeps the Coast Guard Mission-Ready

submarine surfacing

Editorial | 04. 16. 2026

Maintaining America's Undersea Edge: L3Harris Secures Towed Array Production Through 2029

Resources

  • ACB-4012 Air Circuit Breaker Data Sheet

    ACB-4012 Air Circuit Breaker Data Sheet

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