Industrial LM3B800 800A 3-Pole 600 V Circuit Breaker

Engineered for reliability in heavy industrial environments, the LM3B800 800A 3-Pole 600 V Circuit Breaker provides rugged, dependable protection for demanding power distribution systems. This part, LM3B800, is built to safeguard feeders, switchgear, and panel boards from overloads and short circuits, helping keep critical operations up and running.

The three-pole design delivers synchronized disconnection across all phases, reducing the risk of phase imbalances and arcing during fault conditions. With a robust 800 A current rating, it’s capable of interrupting high-current loads before conductors or equipment suffer damage, supporting safer startup, shutdown, and fault response in active facilities.

Rated for up to 600 V, this circuit breaker fits a wide range of industrial applications—from large distribution panels to motor control centers and heavy equipment feeds. Its compatibility with standard industrial electrical architectures makes it a versatile choice for complex, multi-phase power systems where reliable protection is non-negotiable.

Key specifications

• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Part Number: LM3B800

Ideal use cases

• Primary protection for three-phase feeders supplying large motors, pumps, and conveyors in manufacturing facilities
• Protection element within motor control centers (MCCs) and switchgear assemblies
• High-current distribution panels in industrial plants where fast, reliable isolation is essential

What sets this breaker apart

• Coordinated, multi-phase protection: the 3-pole design ensures all phases trip together, enhancing safety and system stability
• High current capability in a compact footprint, suitable for dense switchgear layouts
• 600 V compatibility makes it adaptable across a broad spectrum of industrial power systems

Installation and maintenance tips

Install in an appropriately rated enclosure with compatible bus bars, and tighten terminals to the manufacturer’s torque specifications. Verify electrical connections and ensure compliance with local codes and standards. Conduct periodic inspections for signs of overheating, corrosion, or mechanical wear, and perform routine functional checks to confirm reliable tripping and isolation when needed.