Square D HJA36070UNYP 70A 3-Pole 600 V Circuit Breaker Potential Transformer

Square D HJA36070UNYP is a rugged, system-ready 70 A, 3-pole circuit breaker rated for 600 V, built to protect three-phase power distribution in demanding industrial and commercial environments. As a genuine Square D part (HJA36070UNYP), it integrates seamlessly into existing Square D panels, offering a familiar footprint, reliable protection, and straightforward installation.

Key specifications

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36070UNYP

What this breaker excels at

• Provides simultaneous protection across all three phases, ideal for motors, conveyors, pumps, and other heavy three-phase equipment.
• Designed for easy replacement in Square D systems, helping maintain consistent protection schemes and simplifying spare-parts management.
• Durable construction suited to industrial environments, with clear labeling and a reliable trip mechanism that minimizes nuisance trips and downtime.

Why choose this specific breaker

• Authentic Square D engineering ensures compatibility with your existing protection ecosystem, preserving panel integrity and documentation accuracy.
• Exact 70 A current rating paired with a 600 V rating delivers precise protection for feeders and machinery without overcutting service capability.
• Standardized mounting and wiring patterns reduce installation risk and speed up maintenance checks and future upgrades.

Practical use cases and installation tips

• Ideal for upgrading or replacing aging protection in three-phase distribution panels within manufacturing, processing, or distribution facilities.
• Before installation, verify that the panel, bus connections, and enclosure wiring align with the HJA36070UNYP specifications to ensure a snug, code-compliant fit.
• De-energize equipment and follow proper lockout/tagout procedures during replacement, then label conductors clearly to reflect the three-phase protection layout.