Square D | Q2L3125H | Circuit Breaker | 125A | 3-Pole | 240V | 22kA

Square D Q2L3125H Circuit Breaker — a rugged 125A, 3-pole protection device designed for 240V three-phase systems. Built for maintenance, retrofit, and replacement projects, this breaker delivers dependable fault protection with a robust 22 kA interrupting capacity, helping safeguard your electrical system against high-energy faults.

Why this matters: the combination of 125A rating and 22kA capacity provides a balanced solution for mid-sized industrial panels and equipment feeders, ensuring quick fault clearance while keeping normal operation uninterrupted.

Key specifications

• Amperage: 125 A
• Poles: 3-Pole
• Voltage: 240V
• Interrupting capacity: 22 kA

Compatibility and fit

• Part reference: Q2L3125H is the best reference for compatibility. Confirm fit and ratings before ordering to avoid mismatches.
• This unit is aligned with Square D Q2L-series panels and accessories, making it a natural choice for retrofit or replacement in systems built around these breakers.

Ideal use cases

• Retrofitting existing 3-phase panels that require reliable 125A protection with a 22kA interrupting capacity.
• Maintenance and component upgrades in manufacturing lines, commercial facilities, and data-center infrastructure that operate on 240V three-phase power.
• New or rebuilt panel installations where precise protection and quick fault clearance are crucial for uptime and safety.

Practical tips for installation and selection

• Always verify the panel’s rating and mounting compatibility with the Q2L3125H before purchase. The part number serves as the best reference for compatibility.
• Consider the electrical load profile and fault current levels in your facility to ensure 22kA interrupting capacity is suitable for your service entrance or feeder protection needs.
• Keep a reference copy of the panel schedule and guide when performing retrofits to ensure a seamless exchange with existing breakers.