Square D EGB34090 - 90 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D EGB34090 is a 90 A, 480 V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch-circuit protection in panelboards and loadcenters. Built to handle the demands of modern electrical distributions, it delivers consistent protection where reliability matters most—from bustling commercial spaces to light industrial environments.

Key benefits

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain uninterrupted electrical performance in ever-changing conditions.
• Thermal-magnetic trip unit offers stable, repeatable protection by accurately responding to both overcurrent and short-circuit events, reducing nuisance trips and protecting upstream equipment.
• OEM-compatible design aligns with matching Square D loadcenters and panelboards for straightforward replacement and streamlined installation.
• Three-pole configuration supports 3-phase systems, ideal for commercial and light industrial electrical layouts that demand robust phase distribution at 480 V.
• Versatile for multiple environments suitable for residential, commercial, and light industrial applications where reliable circuit protection is essential.

Technical specifications

• Manufacturer: Square D
• Part number: EGB34090
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 90 A
• Voltage rating: 480 V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and ideal applications

• Upgrading or replacing breakers in commercial panelboards and loadcenters that serve lighting, receptacle banks, HVAC controls, and small motors.
• Integrating into 3-phase distribution systems where reliability and tight short-circuit protection are critical.
• Situations requiring a sturdy, vibration-resistant connection in environments with equipment that experiences movement or vibration.
• New installations in light industrial settings where 480 V systems are standard and space-efficient bolt-on solutions are preferred.

Why this breaker stands out

The Square D EGB34090 isn’t just any 90 A breaker. Its bolt-on design minimizes connection looseness over time, delivering consistent electrical performance in panelboards and loadcenters even under demanding conditions. The combined thermal and magnetic tripping mechanism provides precise protection against both overloads and short circuits, helping protect downstream equipment and improve overall system uptime. When you need a compatible, rugged solution that fits neatly into OEM configurations while covering 3-phase 480 V distribution, this EGB34090 is a purpose-built choice for dependable circuit protection.