Square D HJA36150UNYP 150A 3-Pole 600 V Circuit Breaker

Protect your three-phase electrical system with the Square D HJA36150UNYP 150A 3-Pole 600 V Circuit Breaker. This robust device delivers dependable overcurrent protection for circuits up to 150 amps across three poles, designed to interrupt fault currents and help prevent equipment damage in demanding commercial and light industrial environments.

Key specifications at a glance

• Part Number: HJA36150UNYP
• Current rating: 150 A
• Poles: 3
• Voltage rating: 600 V

Why this circuit breaker stands out

• Three-pole design is ideal for balancing three-phase systems, ensuring coordinated protection across all phases.
• Backed by Square D, a trusted name in electrical safety and panel protection, with compatibility for Square D panels and distribution boards designed for HJA-series breakers.
• Compact form factor fits standard enclosures without crowding, helping you optimize panel layout.
• Clear, durable labeling supports quick identification during maintenance and audits, reducing downtime during fault conditions.

Ideal use scenarios

• Main distribution protection in three-phase commercial panels for offices, retail spaces, or data centers.
• Protection for large motors or equipment fed from 3-phase distribution in light industrial facilities.
• Backup or spare for upgrades in existing Square D installations, ensuring continuity and compatibility.

What to consider before installation

• Verify panel compatibility: ensure your cabinet accepts HJA-series breakers and supports a 3-pole, 600 V device.
• Professional installation recommended: correct alignment, mounting, and connection are critical for safe operation.
• Pair this breaker with appropriate protective devices and feeders to maintain coordinated protection across the system.

Maintenance and care

• Inspect for signs of wear or arcing during routine servicing; replace if contacts show excessive wear or if tripping becomes erratic.
• Keep panel enclosure clean and dry to maintain reliable operation in challenging environments.