Square D HGL36150U33X - 150 A, 3-Pole Circuit Breaker | AmpState

Meet the Square D HGL36150U33X — a 150 A, 3-pole molded case circuit breaker designed to deliver precise, dependable protection for branch circuits in panelboards and loadcenters. Built to integrate seamlessly with Square D equipment, this unit is a practical choice for real-world electrical protection in homes, businesses, and light industrial environments.

Key features that matter in daily electrical protection:

• Compact molded case design optimizes panel space, helping you maximize the layout and organization of multiple circuits within a single panel.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overcurrent and short-circuit conditions, reducing nuisance trips and improving reliability.
• 3-pole, 150 A rating ideal for protecting 3-phase feeders and multi-wire branch circuits common in commercial or light industrial installations.
• OEM-compatible compatibility ensures a trouble-free fit with matching Square D loadcenters and panelboards, supporting seamless upgrades and replacements without rewiring or adaptors.
• Versatile application suitable for residential, commercial, and light industrial electrical systems, making it a flexible choice for diverse projects.

Why this matters in practice:

When a circuit experiences overload or a short circuit, the thermal-magnetic trip unit rapidly interrupts the circuit to prevent insulation damage, overheating, and potential fire risk. The magnetic element provides fast response for short circuits, while the thermal element handles sustained overloads. This combination delivers dependable protection for critical equipment and wiring in three-phase systems.

Technical snapshot:

• Manufacturer: Square D
• Part Number: HGL36150U33X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Poles: 3
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios:

• Replacing a failed 3-pole breaker in Square D panelboards to restore full protection for 3-phase loads.
• Upgrading a panel to a 150 A protection strategy for new equipment or expanded circuits in commercial settings.
• Installing reliable, OEM-grade components in light industrial electrical rooms where consistent trip characteristics are essential.

Practical tips for optimal performance:

• Ensure the breaker is the correct match for your panelboard model to maintain proper fit and trip coordination.
• Torque terminal connections according to the panelboard manufacturer's specifications to maintain electrical reliability.
• Label affected circuits clearly after installation so future maintenance and safety inspections are straightforward.