Square D HJA36070 - 70A, 3-Pole, Circuit Breaker

Introducing the Square D HJA36070 — a 70A, 3-Pole Circuit Breaker engineered for dependable protection in three-phase electrical systems. This device is designed to mount in panelboards, switchboards, and control panels where continuous operation and fast fault interruption matter most.

Designed for industrial, commercial, and OEM environments, the HJA36070 delivers controlled current interruption across all three phases. Its 3-Pole configuration makes it a natural fit for 3-phase circuits, simplifying panel design and reducing wiring complexity while maintaining precise coordination with upstream protective devices.

Key specifications at a glance

• Current rating: 70 amperes
• Poles: 3-Pole
• Type: Circuit Breaker (overcurrent protection)
• Applications: distribution panels, motor control centers, switchboards, control panels

Why this breaker stands out

• Three-phase protection: The 3-pole design ensures synchronized interruption across all phases, helping prevent arc faults and reducing stress on wiring and devices in MCCs and panelboards.
• Versatile installation: Ideal for panelboards, switchboards, and control panels in industrial settings where space and wiring efficiency matter.
• Reliable protection for motors and feeders: Use in motor circuits up to 70A to guard motors, feeders, and associated control gear against overloads and short circuits.
• Proven Square D reliability: Backed by a brand with a long track record in industrial electrical protection and programmatic compatibility with Square D/Schneider Electric systems.

Use cases and best-fit scenarios

- Retrofit or upgrade existing distribution panels to ensure robust overcurrent protection for 3-phase systems.
- Equip motor control centers (MCCs) that require dependable 3-phase protection up to 70A.
- Integrate into commercial electrical rooms where durable protection and straightforward maintenance are priorities.

Installation and care tips

Follow the manufacturer's installation guidelines for mounting, terminations, and testing. Ensure the breaker’s ratings align with the connected equipment and that panel labeling reflects the 70A, 3-Pole configuration. Regularly test trip protection as part of routine electrical maintenance to confirm reliable operation.