Square D EGB34070 - 70 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Square D EGB34070 is a 3-pole molded case circuit breaker (MCCB) rated at 70 A and 480 V, engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. This bolt-on device combines robust construction with precise protection characteristics for demanding electrical environments.

• Secure bolt-on mounting: Provides a rigid, vibration-resistant bus connection that stays tight through equipment start-ups and ongoing operation, reducing service calls caused by loose connections.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by adapting to ambient temperature and load conditions, ensuring fast response to short circuits while minimizing nuisance trips.
• OEM panel compatibility: Designed to pair with matching Square D OEM load centers and panelboards, ensuring optimal fit, electrical performance, and simplified installation and maintenance.
• Three-phase, 480 V operation: Ideal for commercial and light industrial distribution systems, as well as applications requiring reliable protection for 480 V feeders and equipment.
• Targeted applications: Perfect for protecting feeders to motors, HVAC equipment, lighting circuits, and other branch circuits within panelboards and distribution rooms.

Technical specifications

• Manufacturer: Square D
• Part Number: EGB34070
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who this is for: electrical contractors, facility managers, and panel builders who need a reliable, OEM-compatible protection solution for 480 V, three-phase systems in commercial facilities, data centers, retail spaces, or light industrial environments. The bolt-on design delivers a secure, long-lasting connection in rugged settings, while the thermal-magnetic trip unit provides predictable protection across varying loads and temperatures.

Practical buying guidance: verify panel compatibility with Square D EGB34070, ensure mounting openings align with your enclosure, and follow torque specifications to maintain a tight, safe connection. When upgrading feeders or replacing an older breaker, match the 70 A rating and three-pole configuration to preserve system protection and performance.