Square D LJ-4966 - 150A, 240VAC, Circuit Breaker

The Square D LJ-4966 offers dependable, industrial‑grade protection with a precise 150A current rating at 240V. Built for environments where safety and reliability matter, this circuit breaker is ready to guard critical electrical circuits in demanding settings.

Designed for broad compatibility, it excels in panelboards, switchboards, control panels, and OEM equipment. Whether you’re outfitting a new installation or upgrading an aging distribution system, the LJ-4966 provides robust overcurrent protection without compromising on operation or space in your enclosure.

• High-current protection: 150A capacity to reliably shield feeders, motors, and critical loads from overloads and faults.
• Standard 240VAC operation: Aligns with common single-phase distribution schemes found in many facilities, simplifying integration.
• Versatile installation: Suitable for panelboards, switchboards, control panels, and OEM housings, enabling flexible design and retrofits.
• Durable, mission-focused design: Built to maintain safe operation in industrial and commercial environments where downtime and faults must be minimized.

Ideal use cases include motor control centers in manufacturing plants, large commercial electrical rooms housing distribution panels, and OEM equipment enclosures that require a trusted, specification-aligned circuit protection solution.

Why this LJ-4966 stands out: it pairs a proven Square D lineage with a straightforward, reliable overcurrent protection strategy. By delivering 150A at 240V, it matches typical load profiles while helping you avoid nuisance trips and maintain smooth operation across critical circuits—giving engineers and technicians predictable performance you can depend on.

• Smart retrofit and new-build compatibility: Fits LJ-series expectations and current rating, supporting consistent protection across the system.
• Clear documentation and traceability: Use this part to maintain coherent protection schemes and simplify future maintenance or upgrades.
• Practical installation guidance: Plan conductor sizing for 150A protection and ensure enclosure compatibility to streamline field work.