Square D HJA36040AABCSH 36040A 3-Pole 600 V Circuit Breaker

Square D HJA36040AABCSH is a 3-pole, 600 V circuit breaker designed for demanding industrial power distribution. With a specified current rating of 36040 A, this device provides reliable overcurrent protection for three-phase systems up to 600 volts. Part number HJA36040AABCSH identifies a precise, replaceable component within Square D’s trusted protection lineup.

Built to safeguard electrical infrastructure in panels, switchgear, and motor control environments, this 3-pole breaker ensures synchronized protection across all three phases. That means fewer unbalanced loads, reduced risk of equipment damage, and safer, more stable operation for motors, feeders, and critical loads.

Key specifications

• Current rating: 36040 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36040AABCSH
• Brand: Square D

Why this Square D circuit breaker stands out

• Three-pole configuration provides true three-phase protection, helping maintain balanced power and protecting connected equipment from phase faults.
• 600 V maximum rating supports a wide range of industrial applications, from heavy motors to distribution feeders.
• Standardized Square D form factor simplifies replacement and maintenance within existing installations.
• Designed for dependable performance in challenging environments, contributing to reduced downtime and easier service planning.

Ideal use cases

• Protection for three-phase motors and drives in manufacturing lines
• Main and branch circuit protection in industrial panels and switchgear operating at up to 600 V
• Electrical distribution upfits where a reliable, consistent protection device is required

Installation and practical considerations

• Ensure panel and bus compatibility with a 3-pole, 600 V device and confirm the correct frame type for replacement.
• Verify electrical codes and safety procedures during installation or replacement, and keep the part number handy for future maintenance.
• Plan for a straightforward swap in compatible Square D assemblies to minimize downtime and ensure consistent protection across phases.