Square D HGA36150U31X - 150 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Square D HGA36150U31X is a 150 A, 600 V, 3-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built to handle both overcurrent and short-circuit events, this device keeps critical electrical systems safe while minimizing downtime during service or upgrades.

Key benefits

• Fast plug-in connection for quick installation and effortless replacements in existing panelboards and load centers—lower labor costs and reduced outage time.
• Thermal-magnetic trip unit combines thermal protection with magnetic instantaneous trip, providing stable, repeatable performance across varying loads and temperatures.
• OEM-compatible design ensures seamless integration with matching Square D load centers and panelboards, helping maintain coordination and electrical safety standards.
• Versatile for multiple environments suitable for residential, commercial, and light industrial applications where dependable protection matters most.

Technical specifications

• Manufacturer: Square D
• Part number: HGA36150U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading residential service panels where a robust 150 A, 3-pole protection device is required
• Commercial load centers and small to mid-sized electrical rooms needing reliable short-circuit protection
• Light industrial panels where quick swap-in replacement reduces downtime during maintenance or expansion

Why choose this plug-in breaker

Choosing the HGA36150U31X means selecting a solution built for dependable protection and practical maintenance. The plug-in design minimizes installation steps, while the thermal-magnetic trip unit delivers precise coordination with upstream devices and downstream loads. Its OEM compatibility reduces compatibility risk, ensuring correct fit, electrical clearance, and performance that aligns with the rest of your Square D panelboard ecosystem.

Practical tips and insights

• Before installation, confirm panelboard compatibility with the HGA36150U31X to ensure seamless fit and proper electrical clearance.
• When replacing an existing breaker, verify the upstream protective devices are coordinated to prevent nuisance trips while preserving fast response to actual faults.
• Handle with the main power off and follow electrical safety standards to protect technicians and equipment during plug-in replacement.
• Keep a spare on hand for rapid replacement during panel maintenance or expansion projects to minimize downtime.

Upgrade or install with confidence—the Square D HGA36150U31X delivers reliable, fast-acting protection for your panelboard and load center systems, backed by a trusted name in electrical safety.