Square D QOB2125SL 125A 2-Pole 240 V Circuit Breaker

The Square D QOB2125SL 125A 2-Pole 240 V Circuit Breaker is built to protect high-current, 240-volt circuits with dependable, coordinated performance in compatible Square D panels. With a 125-amp rating and two-pole design, it interrupts both hot legs of a 240 V circuit simultaneously, helping safeguard wiring and connected equipment from overloads.

Key benefits

• 125 A current rating provides robust protection for demanding 240 V branch circuits, guarding heavy-load appliances and equipment.
• 2-pole, 240 V operation ensures both hot conductors trip together, reducing shock risk and maintaining safe circuit isolation.
• Part number QOB2125SL identifies an exact replacement within compatible Square D panels, promoting reliable fit and predictable performance.
• Designed for Square D installations to integrate smoothly with existing panel layouts and electrical system planning.

Ideal use scenarios

• Protecting 240 V circuits feeding high-demand appliances such as central air conditioning, electric water heaters, or other large home or light commercial loads.
• Serving as a main or branch protection device in compatible Square D enclosures where a dedicated 125 A two-pole breaker is required.

Installation and safety tips

• Verify the breaker is compatible with your Square D panel model before replacement or installation.
• Power must be fully shut off to the panel before attempting any replacement or installation work; follow all local electrical codes and safety practices.
• Consult the panel’s wiring diagram or installer guide to ensure correct alignment and secure seating of the breaker in its slot.
• Label the circuit clearly after installation to aid future maintenance and troubleshooting.

Specifications at a glance

• Current rating: 125 A
• Poles: 2-pole
• Voltage rating: 240 V
• Part number: QOB2125SL
• Application: Square D panel-compatible 240 V circuits requiring two-pole protection