Square D EGB34100 - 100 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Square D EGB34100 is a robust 100 A, 480 V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and loadcenters. Built for dependable overcurrent and short-circuit protection, this unit is engineered to perform in demanding commercial and light industrial environments.

Key features

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays tight even in equipment rooms with movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal and magnetic sensing for both overload and short-circuit conditions.
• OEM-ready compatibility designed to work with matching Square D OEM loadcenters and panelboards for streamlined installations.
• Versatile applications suitable for residential, commercial, and light industrial electrical distributions that rely on reliable 3-phase protection at 480 V.

Technical specifications

• Manufacturer: Square D
• Part Number: EGB34100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Protect three-phase distribution in commercial spaces such as offices, retail, or data centers that run on 480 V systems.
• Upgrade aging or undersized breakers in panelboards and loadcenters without sacrificing compatibility or reliability.
• Install in light industrial rooms where equipment vibration occurs, relying on the secure bolt-on mounting to maintain a solid electrical connection.
• Use in new installations or retrofits that require a high-quality thermal-magnetic protection solution with clear, repeatable trip behavior.

Why this breaker matters

The EGB34100 combines a rugged bolt-on design with a dependable thermal-magnetic trip mechanism, delivering precise protection for 3-pole, 480 V circuits. Its compatibility with matching OEM panels minimizes adaptation challenges, while the three-pole configuration is ideal for balanced 3-phase distribution. In real-world use, you’ll experience fewer nuisance trips during minor surges and quicker, more predictable response during actual faults, helping protect wiring, equipment, and downstream devices.

Who benefits

• Electrical contractors installing or upgrading 3-phase systems in commercial facilities.
• Facilities managers maintaining panelboards and loadcenters in office buildings, schools, and light industrial settings.
• Maintenance teams seeking reliable, OEM-aligned protection for 480 V distribution networks.

Ready to upgrade your protection with a trusted Square D solution? Add the Square D EGB34100 to your cart and secure reliable 480 V, 3-pole overcurrent protection for your panelboards and loadcenters.