Square D HJA36070SL 70A 3-Pole 600 V Circuit Breaker

The Square D HJA36070SL is a purpose-built 70 A, 3-pole circuit breaker designed for 600 V systems. Engineered for reliability in three-phase applications, it ensures safe, simultaneous shutdown of all phases to protect wiring, equipment, and personnel in industrial and commercial environments.

• Part Number: HJA36070SL
• Current Rating: 70 A
• Poles: 3
• Voltage Rating: 600 V
• Brand: Square D

Why this 3-pole design matters: in a three-phase circuit, a single-pole or two-pole breaker might leave remaining phases energized, increasing risk during a fault. This 3-pole breaker provides coordinated protection by disconnecting all phases, helping prevent damage to motors, drives, and other three-phase equipment.

Ideal use cases include industrial motor drives, conveyors, pumps, and other three-phase loads in panelboards and commercial electrical rooms. The HJA36070SL is a compatible replacement option within the Square D lineup, offering consistent performance for maintenance-ready electrical systems and minimizing downtime when service or replacement is needed.

Installation and compatibility notes: verify that your panel labeling confirms compatibility with HJA36070SL, and ensure the bus type matches your Square D panel. Adhere to standard electrical safety practices during replacement or installation, and maintain a small stock of this common 70 A, 3-pole unit for quick emergency downtime recovery.

With the Square D HJA36070SL, you gain a trusted, robust solution for protecting 600 V three-phase circuits, delivering reliable interruption when faults occur and contributing to safer, more efficient operation of industrial and commercial electrical systems.