Square D HJA36070UAYP 70A 3-Pole 600 V Circuit Breaker

Meet the Square D HJA36070UAYP—a dependable 70 A, 3-pole, 600 V circuit breaker purpose-built for protecting three-phase electrical systems. This Square D device interrupts all three current-carrying conductors when an overload or fault occurs, helping to safeguard motors, transformers, and distribution equipment while supporting safer, continuous operation in demanding commercial and light industrial environments.

Key specifications

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36070UAYP
• Brand: Square D

Why this 3-pole breaker stands out

The 3-pole design ensures simultaneous disconnection of all three phases, providing robust protection for three-phase loads and reducing the risk of phase-to-phase faults. Built to align with Square D distribution systems, this unit is engineered for reliable performance in panels and enclosures that accept HJA-series breakers, helping you maintain consistent protection across your electrical infrastructure.

Ideal use scenarios

• Three-phase motor circuits in manufacturing floors and machine rooms
• Power distribution panels in commercial facilities requiring reliable phase protection
• Industrial equipment setups where precise current interruption up to 70 A is essential

How it protects your system

By rapidly interrupting fault currents across all three phases, the HJA36070UAYP helps prevent equipment damage, minimizes the risk of electrical fires, and supports safer shutdowns. This translates to lower maintenance costs, reduced downtime, and greater uptime for critical processes.

Installation and safety considerations

• Install by a qualified electrician in accordance with local electrical codes and the panel’s installation instructions.
• Verify panel compatibility with HJA-series breakers to ensure proper fit and safe operation.
• Follow appropriate torque and conductor termination practices as specified by the panel manufacturer and Square D guidelines.