Square D HLL36150 - 150 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Square D HLL36150 is a robust 150 A, 600 V, 3-pole molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection inside panelboards and loadcenters. Built to fit neatly into residential, commercial, and light industrial setups, it’s a reliable choice for distributing safe, code-compliant power where you need it most.

Why this breaker stands out:

• Space-efficient molded case design maximizes panel real estate, helping you fit more protection without crowding your enclosure.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance. The thermal element guards against gradual overcurrent, while the magnetic element provides a fast, decisive response to short circuits.
• 3-pole configuration is ideal for three-phase systems, enabling comprehensive protection across all conductors in the circuit.
• OEM-compatible—designed to work with matching Square D OEM loadcenters and panelboards, ensuring straightforward installation and reliable integration.
• Versatile for multiple applications—suited for residential feeders, commercial panelboards, and light industrial distribution where dependable protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: HLL36150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases to consider: install this breaker to protect a three-phase feeder in a commercial panelboard, safeguard a subpanel serving a light industrial area, or provide reliable branch protection for a residential multi-load enclosure where space is at a premium. Its precise trip characteristics help prevent nuisance outages while ensuring rapid isolation during a fault, giving you peace of mind and consistent electrical performance.