Square D HJA36070SR 70A 3-Pole 600 V Circuit Breaker

Discover reliable three‑phase protection with the Square D HJA36070SR circuit breaker. Engineered for demanding industrial and commercial power systems, this unit delivers a solid 70 A current rating across 3 poles and a 600 V maximum voltage, making it a dependable choice for safeguarding motors, conveyors, pumps, and other critical equipment in your panelboard setup. The part number HJA36070SR identifies this specific model in the Square D lineup, helping you source an exact direct replacement or compatible installation with ease.

Key specifications that matter

• Current rating: 70 A
• Poles: 3
• Voltage rating: Up to 600 V
• Part number: HJA36070SR
• Brand: Square D

Why this 3‑pole model is a strong fit

In three‑phase systems, a 3‑pole circuit breaker like the HJA36070SR disconnects all live conductors simultaneously, reducing the risk of uneven current flow and equipment damage. The 70 A rating suits moderate to heavy loads, such as industrial motors, air handling units, and large compressors, while the 600 V capability ensures compatibility with higher‑voltage distribution in commercial environments. This combination of rating, configuration, and voltage makes it a practical choice for panel boards and service entrances that require robust phase protection.

Ideal use scenarios

• Three‑phase motor protection in manufacturing lines, HVAC systems, and processing equipment
• Protection for industrial pumps, fans, and conveyors in warehouses or facilities with medium to high power demands
• Replacement or stocking for Square D panels that call for a 3‑pole, 70 A, 600 V device

How it helps you manage risk and downtime

With a dedicated 3‑pole design, the HJA36070SR minimizes fault propagation by tripping all phases together when overloads or faults occur. This rapid, coordinated shutdown protects wiring insulation, reduces arc risk, and shortens downtime by enabling faster restoration after a fault is cleared. For technicians and facility managers, it provides a clear, scalable protection point in your power distribution strategy.

Practical considerations for installation and maintenance

• Verify panel compatibility with HJA‑series devices and ensure correct mounting and bus bar alignment within your enclosure
• Inspect the breaker during routine servicing for signs of wear, corrosion, or deformities in terminals
• Keep spare HJA36070SR units on hand for fast replacement during maintenance outages or equipment upgrades

Choose the Square D HJA36070SR when you need a dependable, three‑pole, 70 A protection solution for 600 V systems. It’s built for real‑world industrial use, delivers clear protection for critical loads, and aligns with common Square D panel configurations—helping you keep power flowing safely and reliably.