Square D HJA36040AA 36040A 3-Pole 600 V Circuit Breaker

Meet the Square D HJA36040AA 36040A 3-Pole 600 V Circuit Breaker — a genuine Square D protective device engineered for dependable three-phase protection in demanding electrical environments. The three-pole configuration delivers synchronized disconnection across all phases, helping to safeguard motors, transformers, and distribution circuits from overloads and short circuits at up to 600 V.

Technical specifications

• Part Number: HJA36040AA
• Poles: 3
• Voltage rating: 600 V
• Current rating: 36040 A

Why this 3-Pole breaker stands out

Designed specifically for three-phase systems, this Square D circuit breaker provides balanced protection across all live conductors, reducing the risk of phase imbalance and equipment damage. Being a genuine part with the HJA36040AA designation ensures compatibility with Square D panels and configurations, making replacements straightforward and reliable. The 3-pole, 600 V rating is ideal for industrial and commercial settings where robust, coordinated overcurrent protection is essential for safety and uptime.

Ideal use cases

• Protecting three-phase motors, compressors, and conveyors in manufacturing facilities
• Distributing and safeguarding three-phase feeders in electrical rooms and switchgear assemblies
• Replacing aging protective devices in existing Square D installations to maintain system coordination

Practical installation and maintenance tips

• Verify that the system’s three-phase load and voltage meet the 600 V rating before installation.
• Ensure proper fitting within compatible Square D panels and follow standard torque specifications for secure terminations.
• Keep the original part number (HJA36040AA) in your spare parts inventory to simplify future replacements and maintenance.