Square D HDA36070UP 70A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36070UP—a 70 A, 3-pole, 600 V circuit breaker designed to safeguard three-phase electrical systems with precision and reliability. Identified by Part Number HDA36070UP, this device is built to interrupt fault currents and overloads, helping protect both equipment and personnel while minimizing downtime in demanding power environments.

Key specifications at a glance

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HDA36070UP
• Brand: Square D

Why this 3-pole breaker matters for your system

This circuit breaker is purpose-built for three-phase power, delivering balanced protection across all conductors in your system. With a 600 V maximum rating, it’s suitable for a wide range of industrial and commercial distributions, helping you keep equipment safe from overloads and short circuits. The HDA36070UP is a practical, drop-in solution when you need dependable protection without complicating your panel setup.

Ideal use cases

• Protecting three-phase motor circuits in manufacturing lines and processing equipment.
• Distributing power in commercial or light-industrial panels that run on 3-phase feeds.
• Providing reliable branch protection for equipment racks and distribution boards in industrial environments.

How it works and what it protects

The HDA36070UP operates as a protective gateway for your three-phase circuits. When current exceeds the rated 70 A or a fault occurs, the device interrupts the circuit to prevent damage to wiring, components, and connected loads. This helps reduce the risk of fire hazards, costly equipment failures, and unexpected downtime.

Installation notes and compatibility

Designed to integrate with compatible Square D panels and distribution configurations, this breaker is intended for use in systems that require three-pole protection at 600 V. For best results, verify panel compatibility with the HDA36070UP specification and follow all local electrical codes during installation. When replacing or upgrading, choose the identical part number to maintain system integrity and continuity of protection.

Maintenance and practical tips

• Monitor for frequent tripping, which may indicate oversized loads or underlying wiring faults that should be evaluated by a qualified electrician.
• Keep spare HDA36070UP units on hand for rapid replacements in preventive maintenance programs.
• Inspect terminals and mounting for secure connections during periodic servicing to maintain reliable performance.