Square D | PLM34120CU44A | Circuit Breaker | 1200A | 3-Pole | 100kA

Square D PLM34120CU44A is a purpose-built circuit breaker designed for demanding industrial and commercial power systems. Engineered to meet exacting specifications, this 1200A, 3-Pole device delivers dependable protection in environments where high fault-current handling and reliable tripping are non-negotiable.

Key features at a glance

• Amperage capacity: 1200A, making it suitable for large feeders and main distribution paths in sizable panels.
• Poles: 3-Pole, ideal for three-phase electrical systems common in manufacturing, data centers, and heavy equipment installations.
• Interrupting rating: 100kA, providing a robust margin to safely interrupt high-energy faults and protect downstream equipment.
• Application scope: designed for maintenance, retrofit, and replacement projects where exact spec matching is critical.

Why this model stands out for serious installations

• : The PLM34120CU44A is identified by its part number, which is the best reference for ensuring a precise fit in your Square D panel and configuration.
• High-capacity protection: With a 100kA interrupting capacity, it’s engineered to handle substantial fault currents without compromising safety or performance.
• Three-phase reliability: The 3-Pole design aligns with standard three-phase systems, supporting balanced protection across all phases and reducing the risk of uneven fault responses.

Use cases and scenarios

• Retrofits in large commercial or industrial panels where existing breakers require higher amperage and enhanced fault-current protection.
• Maintenance replacements in facilities with heavy motor loads, conveyors, presses, or other three-phase equipment that demand robust protection and rapid interruption.
• New installations or panel upgrades that require exact 1200A, 3-Pole, 100kA specifications to meet system design and safety standards.

Practical considerations for procurement and installation

• Verify fit and ratings before ordering: The Part Number PLM34120CU44A is the most reliable reference for compatibility with your Square D panel configuration.
• Plan for installation: Engage a qualified electrician or electrical technician to ensure proper mounting, wiring, and adherence to safety practices during replacement or retrofit.
• Panel labeling and documentation: Update panel schedules to reflect the new device, its amperage, and its interrupting rating to support future maintenance and inspections.

What you gain with this Square D breaker

• Peace of mind from a high-capacity, reliable protective device tailored for demanding power systems.
• Improved protection for critical equipment and reduced downtime due to faster, dependable fault interruption.
• A targeted, specification-driven replacement option that minimizes guesswork during retrofits and maintenance projects.