Square D EDB34125SA - 125 A, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D EDB34125SA is a 125 A, 3-pole bolt-on molded-case circuit breaker designed for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built to withstand demanding commercial and light industrial environments, it helps safeguard electrical systems while simplifying upgrades and replacements.

Key advantages that set this breaker apart:

• Secure bolt-on mounting: A rigid, vibration-resistant bus connection minimizes movement and wear, delivering reliable performance in panels that experience vibration or frequent door cycling.
• Thermal-magnetic trip unit: Combines overload protection with short-circuit protection for stable, repeatable operation across varying fault currents and load conditions.
• OEM-compatible design: Engineered to drop into matching Square D load centers and panelboards, reducing compatibility concerns during replacements or upgrades.
• Versatile, 3-phase suitability: Ideal for residential, commercial, and light-industrial distributions that require a 125A, 3-pole breaker for robust 3-phase protection or multi-branch circuits.

Technical snapshot

• Manufacturer: Square D
• Part Number: EDB34125SA
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases to consider:

• Upgrading a commercial panelboard to safely accommodate higher 3-phase loads without compromising protection coordination.
• Replacing aging or incompatible breakers in panels where a secure bolt-on connection is prioritized over plug-in convenience.
• Implementing in light-industrial distributions where vibration, equipment startup transients, or frequent panel access demand a sturdy, reliable bus connection.

Why this option matters for installers and facility managers: the bolt-on design delivers a more secure electrical connection, reducing the risk of loosened contacts during thermal cycling or vibration. Coupled with a thermal-magnetic trip unit and a 125A rating, it provides clear, predictable protection for medium-load circuits, helping prevent nuisance trips and safeguarding connected equipment. For projects requiring a trusted Square D solution, the EDB34125SA represents a dependable, industry-standard choice—available from AmpState as part of Square D’s line for matched panelboard compatibility and long-term reliability.