Square D QOB3155237 15A 3-Pole 240 V Circuit Breaker

Meet the Square D QOB3155237 15A 3-Pole 240 V Circuit Breaker — a precise, reliable protection device designed for 3-phase 240V systems. This specific part number ensures a perfect fit in compatible Square D panels, delivering dependable overcurrent protection for mid-range loads in commercial and light-industrial settings.

Key Specifications

• Current rating: 15 A
• Poles: 3
• Voltage rating: 240 V
• Part number: QOB3155237

What it protects and where it shines

This 3-pole breaker is ideal for safeguarding 3-phase equipment and circuits that operate at 240 volts. Use cases include motor drives, compressors, HVAC equipment, pumps, conveyors, and other substantial loads wired for 240V. By disconnecting all three live conductors simultaneously, it enhances safety during maintenance and fault events, helping protect both people and equipment.

Why choose this Square D breaker

• Exact fit and reliability—Part number QOB3155237 guarantees compatibility with Square D panels that accept 3-pole 240V breakers, simplifying replacement and reducing installation guesswork.
• Clear protection for 240V networks—The 15A rating aligns with common load profiles, preventing nuisance trips while guarding against overloads on balanced or unbalanced 240V circuits.
• Designed for 3-phase systems—Serves as a safe, reliable disconnect for all live conductors in a 240V, three-phase configuration.

Installation and maintenance tips

Ensure the panel is de-energized before replacement. Confirm the panel accepts a 3-pole 240V breaker in the QOB family, then install in the correct slot with proper alignment to the bus bars. After installation, verify proper seating and labeling per your panel’s instructions, and schedule routine checks to monitor connection integrity and any trip history that may indicate changing load conditions.