Square D HJA36150SPYP 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HJA36150SPYP 150A 3-Pole 600 V Circuit Breaker — a rugged, three-phase overcurrent protector designed for demanding commercial and light industrial panels. With a 150 A current rating and a 600 V maximum, this breaker is built to safeguard your electrical distribution system against overloads and short circuits while keeping your operation running smoothly.

• Three-pole design for three-phase protection — ideal for motor loads, compressors, conveyors, and other equipment that rely on balanced three-phase power.
• High-capacity protection — supports up to 150 A circuits, helping to prevent damage from electrical faults in demanding environments.
• 600 V compatibility — suitable for a wide range of commercial and light industrial applications that run on higher-voltage distribution systems.
• Brand reliability — part of the Square D line, known for durable construction and consistent performance in panelboards and distribution assemblies.
• Compatibility and installation — designed to fit compatible Square D panels and enclosures that accept 3-pole, 600 V breakers, simplifying stocking and maintenance for installers and facility teams.

Where it shines

• Industrial and commercial panels — protect feeders and branch circuits in machine rooms, workshops, and processing lines where three-phase power is standard.
• Motors and equipment — safeguard motors, pumps, fans, and conveyors from overloads, reducing downtime and wear on critical assets.
• HVAC and processing environments — provide reliable protection for compressors, chillers, and other high-demand equipment in facility systems.

Why choose this breaker? It combines solid, proven performance with a straightforward 3-pole configuration, delivering dependable overcurrent protection for three-phase circuits up to 600 V. By selecting a recognized Square D part number like HJA36150SPYP, you’re choosing a component designed for long service life, easier field replacement, and consistent electrical safety in your panelboard configuration.

Installation and safety notes

• Ensure your panelboard is rated for 3-pole, 600 V breakers and that the HJA36150SPYP is compatible with the enclosure style you’re using.
• Install by a qualified electrician following all local codes and manufacturer guidelines to maintain system safety and warranty coverage.
• Keep spare breakers on hand for rapid replacement to minimize downtime after a trip event.