Square D EJB36070 70A 3-Pole 347 V Circuit Breaker

Meet the Square D EJB36070, a purpose-built three-pole circuit breaker engineered to protect your 347 V, three‑phase electrical systems. With a 70 A current rating, this part delivers dependable overcurrent protection for motors, compressors, and other critical equipment in commercial and light industrial panels. The EJB36070 is more than a switch—it’s a safeguard that helps minimize downtime and electrical damage in demanding environments.

Why choose the Square D EJB36070

• Three-pole protection keeps all three phases in sync, reducing the risk of unbalanced loads that can strain motors and equipment.
• 347 V rating makes it suitable for commercial distribution networks and equipment that operate above residential voltage levels, helping to manage higher-capacity circuits safely.
• 70 A current rating aligns with mid-range branch circuits and motor-start applications, providing reliable protection without nuisance tripping on normal startup surges.
• Brand reliability from Square D—trusted in electrical panels and distribution systems for decades.

Ideal use cases

• Protect three-phase motors in manufacturing lines, pumps, and conveyors.
• Guard HVAC equipment and commercial machinery fed from 347 V distribution networks.
• Install in electrical panels that require robust, coordinated protection across all three phases.

How it helps you manage electrical risk

The EJB36070 acts as a first line of defense against overloads and short circuits. By interrupting current quickly across all poles, it helps prevent overheating, insulation damage, and downstream equipment failures. This means fewer unplanned outages, lower maintenance costs, and greater peace of mind for facilities relying on reliable 3‑phase power.

Key specifications

• Part number: EJB36070
• Brand: Square D
• Poles: 3
• Current rating: 70 A
• Voltage rating: 347 V
• Application: Three-phase AC distribution and protection

When selecting protection for a 347 V, three-phase setup, the Square D EJB36070 provides a precise balance of protection and practicality. It’s a solid choice for professional electrical installations where reliable trip performance and consistent operation matter most. Use this model when you need a dedicated, three-pole solution that aligns with standard commercial and light industrial power layouts, and when your system requires the dependable protection that the Square D name stands for.