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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

Submarine slices through water surface under a blue sky

Press release | 07. 23. 2026

L3Harris to Deliver Critical Monitoring Systems for US Navy Submarine Programs

L3Harris Technologies has secured a contract from General Dynamics Electric Boat to provide battery monitoring systems for the U.S. Navy's Virginia- and Columbia-class submarine programs.

Submarine slices through water surface under a blue sky

Press release | 07. 23. 2026

L3Harris to Deliver Critical Monitoring Systems for US Navy Submarine Programs

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

Resources

  • ACB-4012 Air Circuit Breaker Data Sheet

    ACB-4012 Air Circuit Breaker Data Sheet

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