Square D | NA36900 | Circuit Breaker | 900A | 3-Pole | 50kA

Meet the Square D NA36900 circuit breaker—a purpose-built, three-pole protector engineered for demanding industrial environments. With a commanding 900 A rating and a 50 kA interrupting capacity, this breaker is designed to guard expensive motors, feeders, and distribution circuits where reliable, rapid fault interruption is non-negotiable.

Designed for maintenance, retrofit, and replacement projects, the NA36900 delivers consistent performance in systems that require robust three-phase protection. When you need an exact, code-compliant part for your panel, this is the reference you can trust—the NA36900 part number is the clearest indicator of compatibility.

Key Specifications

• Amperage: 900 A
• Poles: 3-Pole
• Interrupting Rating: 50 kA
• Part number: NA36900

Important: Confirm fit and ratings before ordering. The part number is the best reference for compatibility with your Square D panels and service equipment.

Why this breaker stands out

Authentic Square D construction ensures dependable performance in challenging electrical environments. The 3-pole configuration provides balanced, three-phase protection across circuits feeding motors and three-phase loads. A 50 kA interrupting rating means the breaker can safely interrupt substantial fault currents, helping to protect both equipment and personnel while keeping downtime to a minimum.

Ideal use cases

• Maintenance replacements in existing Square D panels that require a 900 A, 3-pole unit
• Retrofits needing higher current protection for three-phase systems
• New installations in industrial facilities with heavy motors or complex distribution networks

Practical guidance

To ensure you’re selecting the correct unit, rely on the NA36900 part number as your compatibility reference and verify specifications against your panel directory and system requirements. For proper installation and safety, work with a qualified electrician and follow applicable electrical codes and procedures.