Square D HDA36125UA 125A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36125UA 125A 3-Pole 600V Circuit Breaker — a purpose-built, three-phase protective device designed to guard your power distribution with precision and reliability. Built for industrial and commercial environments, this breaker handles demanding loads while delivering predictable tripping performance when faults occur.

What sets the HDA36125UA apart?

• Three-pole protection for balanced 3-phase circuits up to 600 V, ensuring coordinated protection across all phases.
• 125 A current rating ideal for feeders and segments that require robust overcurrent protection without unnecessary shutdowns.
• Direct compatibility with Square D panels and installations that accept HDA series breakers, simplifying replacements and upgrades.
• Industrial-grade durability designed to withstand the rigors of daily operation in demanding environments.
• Clear identification part number HDA36125UA, making ordering, inventory, and maintenance straightforward.

Key specifications at a glance

• Current rating: 125 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36125UA
• Application: 3-phase electrical systems within Square D panelware

Ideal use cases

• Feeder protection for 3-phase industrial equipment and machinery in manufacturing lines
• Panelboard upgrades or replacements in facilities transitioning to higher voltage distributions
• Power distribution feeders in commercial buildings with 3-phase load profiles
• Systems requiring reliable isolation and rapid fault interruption to minimize downtime

How this breaker supports safer, smarter electrical design

• Designed to deliver dependable overcurrent protection, helping to prevent damage to motors, drives, and feeders
• Three-pole configuration ensures balanced interruption across all phases, reducing the risk of phase imbalance during faults
• Easy to source and replace within existing Square D ecosystems, reducing maintenance complexity and downtime

If you’re an electrical contractor, facilities manager, or maintenance engineer looking to optimize a 3-phase distribution system, the Square D HDA36125UA 125A 3-Pole 600V Circuit Breaker provides precise protection, straightforward compatibility, and durable performance under demanding conditions. Use it wherever reliable protection for up to 600 V, three-phase loads, and 125 A feeders is required.