Square D HJA36125UOYP 125A 3-Pole 600 V Circuit Breaker

Square D HJA36125UOYP 125A 3-Pole 600 V Circuit Breaker is a robust protection device built for reliable performance in demanding electrical environments. Designed by Square D, this 3-pole breaker delivers solid overcurrent protection for three-phase feeders and equipment, helping to prevent damage from overloads and short circuits.

Key specifications

• Current rating: 125 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36125UOYP

Why this model stands out

• Three-pole design provides balanced protection across all phases in 3‑phase systems, maintaining stable operation and reducing the risk of phase-related faults.
• Durable construction tailored for commercial and light industrial panel installations, delivering dependable performance over time.
• Compact form factor fits standard electrical panels without crowding bus bars, making replacements and upgrades straightforward.
• Trusted Square D engineering offers predictable trip characteristics and consistent protection for connected equipment.

Ideal use cases

Perfect for protecting three-phase feeders in:

• Industrial machinery circuits and motor loads in manufacturing environments
• Commercial electrical panels supplying large equipment and systems
• HVAC and mechanical systems that rely on reliable three-phase protection

Installation and compatibility tips

• Verify that your panel accepts a 3-pole, 125 A device and that the bus configuration matches the HJA36125UOYP model.
• Ensure secure conductor termination and follow proper torque practices for terminal screws.
• Keep an on-hand spare at the ready to minimize downtime during maintenance or panel upgrades.

With the Square D HJA36125UOYP 125A 3-Pole 600 V Circuit Breaker, you gain dependable overcurrent protection for three-phase circuits, safeguarding wiring, controls, and connected equipment while supporting smooth, uninterrupted operation.