Square D HJL36150 - 150 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Square D HJL36150—a 150A, 600V, 3-pole molded case circuit breaker built to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Designed for real-world electrical environments, this breaker blends compact form with robust protection, making it a practical upgrade for a wide range of installations.

Why this breaker stands out

• Compact molded case design—maximizes panel space while maintaining reliable protection, helping you fit more circuits into the same enclosure.
• Thermal-magnetic trip unit—provides stable, repeatable protection performance by responding accurately to both overloads and short circuits across varying conditions.
• 150A, 600V rating—suitable for commercial and light industrial applications, supporting multi-circuit panels and higher-demand loads.
• 3-pole configuration—efficiently protects 3-phase circuits and aligns with standard three-phase panelboard layouts.
• OEM-compatible—designed to pair with matching Square D OEM loadcenters and panelboards for straightforward replacement and consistent performance.
• Specific use—ideal for residential, commercial, and light industrial environments where reliable protection and space optimization matter.

Where it fits best

• Upgrading aging panels to support higher loads while preserving panel layout and wiring schemes.
• Installing or expanding commercial electrical rooms where 3‑phase protection is required up to 600V.
• Replacing a failed breaker in compatible Square D panelboards with a like-for-like 150A, 3-pole unit to maintain system integrity.

Performance you can trust

The thermal-magnetic trip mechanism delivers dependable protection by instantly interrupting fault currents while resisting nuisance trips during moderate overloads. This translates to fewer service interruptions and more consistent system uptime, especially in environments with variable loads and occasional short-circuit events.

Technical snapshot

• Manufacturer: Square D
• Part Number: HJL36150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Installation and maintenance tips

• Always verify compatibility with your panelboard or loadcenter—this unit is designed for use with matching OEM equipment.
• Follow local electrical codes and the manufacturer’s installation guidelines to ensure correct torque, alignment, and safe practice.
• Plan for coordinated protection: pair this 150A breaker with appropriately sized feeders and downstream devices to optimize protection without nuisance trips.
• Periodically inspect for signs of wear or overheating and replace any unit showing deformation or discoloration.

Engineered for reliability and space-efficient protection, the Square D HJL36150 is a practical, durable choice for safeguarding critical loads in panelboards and loadcenters. If you’re seeking a robust 150A, 600V, 3-pole molded case breaker that integrates smoothly with Square D systems, this unit is a precise, purpose-built fit.