Square D HGA36150U31XAABC 150A 3-Pole 600 V Circuit Breaker Potential Transformer

The Square D HGA36150U31XAABC is a robust 3-pole circuit breaker designed for demanding industrial power systems. With a 150 A rating and a 600 V maximum rating, it delivers reliable protection and safe disconnection across all three phases.

Why it stands out

• Accurate protection for three-phase systems: 3-pole configuration ensures all phases trip together, preventing phase imbalances and equipment damage.
• High-current capability: 150 A rating supports sizable feeders and motor circuits without nuisance tripping.
• 600 V voltage tolerance: Suitable for industrial power distribution environments, offering a wide margin for surges and switching transients.
• Integrated potential transformer interface: Designed to support metering and protective relays with voltage sensing for precise fault detection and system monitoring.
• Reliable Square D pedigree: Trusted protection solutions backed by global service and standardized compatibility with Square D panels and components.

What problems it solves

In a busy facility, unexpected line faults or overloads can cause costly downtime. This model provides coordinated trip protection across all live lines, reducing the risk of single-phase faults causing damage to motors and transformers. The potential transformer interface supports secondary sensing for metering, SCADA or protection relays, helping operators track demand, maintain power quality, and quickly identify fault conditions.

Ideal applications

• Three-phase feeders in manufacturing floors, CNC mills, and conveyor systems
• Electrical rooms and distribution panels in data centers or critical facilities
• Any installation requiring a robust 3-pole disconnect at 150 A with 600 V rating

Installation & maintenance tips

Ensure compatibility with your panelboard and follow manufacturer torque specs for terminal connections. This device should be installed by qualified personnel in accordance with local electrical codes. Regular inspection of connections, cool-down periods after fault events, and periodic testing of trip functionality will help maintain reliability.

Specification at a glance

• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HGA36150U31XAABC
• Applications: Three-phase circuit protection with potential transformer interface