Square D EDB34045 - 45 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D EDB34045 is a 45A, 480V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for rugged installations, it combines a secure bolt-on mounting with a thermal-magnetic trip unit to deliver stable, repeatable protection when it matters most.

Why this breaker stands out

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection that stays tight in demanding environments, reducing the risk of connection loosening and intermittent trips.
• Thermal-magnetic trip unit provides precise, dependable protection by combining a thermal element for gradual overcurrent response with a fast magnetic trip for instantaneous short-circuit protection.
• OEM compatibility is designed to work seamlessly with matching Square D OEM load centers and panelboards, helping you maintain consistent protection and signaling across the system.
• Versatile application range well-suited for residential, commercial, and light industrial installations where robust branch-circuit protection is required.

What it protects and how it helps you

In any electrical distribution setup, protecting the wiring and devices downstream from faults is critical. The EDB34045 safeguards each branch circuit from overcurrent events and short circuits, limiting potential damage, downtime, and safety risks. Its 3-pole design ensures coordinated protection across three phases, which is essential for balanced loads in larger panelboards and load centers.

Specifications at a glance

• Manufacturer: Square D
• Part Number: EDB34045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or expanding panelboards in light commercial spaces where 480V distribution is used.
• Refurbishing or maintaining residential or small to mid-size commercial electrical systems that require reliable, vibration-resistant protection.
• Installing in environments with equipment-induced vibration (pumps, HVAC, vending systems) where a bolted connection helps prevent loose-terminal issues.

Practical guidance for installers and operators

• Ensure compatibility with your existing Square D OEM load centers or panelboards to maintain cohesive protection schemes and signaling.
• Verify torque specifications for bolt-on mounting per manufacturer guidelines to preserve bus integrity and trip accuracy.
• Consider pairing with adjacent protective devices in the same panelboard to achieve coordinated protection and predictable shutoff behavior during faults.
• Use in settings where reliability during continuous operation and occasional vibration is essential to minimize nuisance trips.

Whether you're building out a new panel, replacing a worn breaker, or standardizing protection across a mixed-use facility, the Square D EDB34045 delivers robust, dependable circuit protection with a design that respects the realities of real-world installations. It’s a thoughtful choice for professionals who need proven performance, OEM compatibility, and durable, bolt-on reliability in a 3-pole, 480V package.