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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

Hunterwater is an unmanned system that autonomously searches for, identifies and neutralizes underwater mine threats without putting sailors in harm’s way.

Editorial | 11. 03. 2026

Hunterwater: Taking Sailors Out of the Minefield

When the mission calls for minehunting, Hunterwater answers.

Hunterwater is an unmanned system that autonomously searches for, identifies and neutralizes underwater mine threats without putting sailors in harm’s way.

Editorial | 11. 03. 2026

Hunterwater: Taking Sailors Out of the Minefield

A digital rendering of a modern submarine highlights L3Harris mast-raising equipment and electronic control units integrated into the vessel’s sail and hull.

Press release | 11. 02. 2026

L3Harris to Advance Allied Submarine Technology

Submarine slices through water surface under a blue sky

Editorial | 10. 22. 2026

Powering America's Most Advanced Submarines

AUKUS Undersea Warfare Capabilities at RIMPAC 2026

Editorial | 10. 19. 2026

L3Harris’ “Rock Lobster” Acoustic Communications System Advances AUKUS Undersea Warfare Capabilities at RIMPAC 2026

125 years logo

Editorial | 10. 01. 2026

A Legacy of Innovation: 125 Years on the Camden Waterfront

Resources

  • ACB-4012 Air Circuit Breaker Data Sheet

    ACB-4012 Air Circuit Breaker Data Sheet

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