Square D HJA36150UJYP 150A 3-Pole 600 V Circuit Breaker

Square D HJA36150UJYP 150A 3-Pole 600 V Circuit Breaker delivers reliable, three-phase overcurrent protection for demanding industrial and commercial electrical systems. With a 150-amp current rating, three poles, and a 600-volt maximum, this breaker is engineered to safeguard feeders, motors, and distribution panels where dependable protection matters most.

Key specifications

• Part Number: HJA36150UJYP
• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V
• Brand: Square D

Why this breaker stands out in your system

Designed to integrate smoothly with Square D panels and enclosures that accept this style, the HJA36150UJYP provides robust protection for three-phase circuits. Its balanced three-pole construction helps ensure synchronized interruption across all phases, reducing the risk of unbalanced loads and equipment damage. Built for reliable performance in real-world conditions, it supports steady operation of industrial feeders and large motors, helping minimize downtime and maintenance costs over the long term.

Ideal use cases

• Three-phase motor circuits in manufacturing equipment, conveyors, and machinery
• Power feeders and distribution lines in commercial or light industrial panels
• Upgrades or replacements in existing Square D installations to restore or enhance protection

What problems it solves

By providing precise overcurrent protection for all three phases, this circuit breaker helps prevent conductor insulation damage, transformer overloads, and motor burnout during overloads or short-circuit events. The result is improved system reliability, reduced equipment wear, and a clearer path to rapid recovery after electrical faults.

Practical tips for best results

• Verify compatibility with your Square D panel or enclosure and ensure the enclosure supports HJA-series breakers.
• Confirm the circuit load requirements align with the 150 A rating to avoid nuisance trips during normal operation.
• Follow standard electrical torque specifications and installation practices to maintain secure connections and optimal trip performance.