Square D HGA36125UH 125A 3-Pole 600 V Circuit Breaker

Meet the Square D HGA36125UH 125A 3-Pole 600 V Circuit Breaker — a purpose-built overcurrent protection device engineered for reliable performance in demanding three-phase systems. With part number HGA36125UH, this breaker is designed to safeguard electrical circuits in commercial and industrial environments where uptime matters as much as safety.

Key specifications

• Current rating: 125 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HGA36125UH
• Brand: Square D

Why this matters for your installation

In three-phase systems, a 3-pole breaker like the HGA36125UH provides coordinated protection across all live conductors. This helps prevent equipment damage from overcurrent events and reduces the risk of cascading faults that can impact entire panels. The 600 V rating supports a wide range of industrial and commercial applications, giving you a single, reliable solution for higher voltage networks.

Ideal use cases

• Protection for 3-phase distribution panels in manufacturing facilities, warehouses, and processing plants
• Replacement or upgrade of aging breakers in compatible Square D panels
• Protection of motors, drives, and other three-phase equipment from overloads
• Residential-commercial hybrids or light-industrial applications where robust 3-pole protection is required

What sets it apart

This Square D circuit breaker combines a clear, proven design with a robust current path suitable for continuous operation in demanding environments. Its 125 A rating aligns with moderate-to-heavy load profiles, while the 3-pole configuration ensures synchronized protection across all phases. For projects requiring a trusted, compatible device within the Square D ecosystem, the HGA36125UH delivers dependable performance without the guesswork of mismatched components.

Practical tips for installation and maintenance

• Verify that your panel labeling indicates compatibility with HGA-series breakers and the HGA36125UH part number before installation
• Ensure the system voltage matches the 600 V rating and that three-phase wiring is correctly configured for a 3-pole device
• Keep a spare 3-pole breaker on hand for quick replacement to minimize downtime during maintenance
• Consult a licensed electrician for proper mounting, torque specifications, and panel-wide protection coordination