Square D QO3151042 15A 3-Pole 240 V Circuit Breaker

The Square D QO3151042 15A 3-Pole 240 V Circuit Breaker is a robust solution designed to protect multi-conductor 240-volt circuits in Square D QO panels. With three energized poles and a 15-amp rating, this unit provides dependable overcurrent protection for demanding electrical loads while keeping installation streamlined and code-aligned.

Why this model matters

• Three-pole design for 240 V protection: Safely disconnects all three conductors on a 240 V circuit, ensuring balanced protection for equipment that relies on multiple hot legs.
• 15-amp rating: Quietly handles moderate load appliances and equipment without nuisance trips, while still delivering reliable protection against overloads.
• QO family compatibility: Engineered to fit standard Square D QO load centers and enclosures, delivering a consistent, secure mount and predictable performance.
• Part number clarity: QO3151042 is the precise replacement choice for 15 A, 3-Pole, 240 V service needs, making stock management and service calls straightforward.

Ideal applications

Use this 3-pole 240 V breaker to protect circuits that power three-phase equipment or three-hot-leg loads in residential-style or light commercial environments. Typical scenarios include HVAC equipment, 240 V motors, compressors, and other heavy-duty appliances that require reliable disconnect across all conductors. It’s an excellent fit when you’re expanding a panel, upgrading from a lower-pole count, or replacing a failing unit with a like-for-like 15 A 3-Pole 240 V breaker.

What problems it solves

• Prevents electrical damage from overcurrents on all three lines of a 240 V circuit, reducing the risk of fire or equipment failure.
• Provides a clean, coordinated fault response across multiple poles, helping maintain panel reliability and simplify troubleshooting.
• Offers a straightforward, familiar form factor for quick replacements, minimizing downtime during service or upgrades.

Practical guidance

When selecting a breaker for your Square D panel, ensure you match the pole count (3-Pole), voltage rating (240 V), and current rating (15 A) to the circuit’s requirements. This model is the right choice for 15-amp, three-conductor 240-volt loads within QO-series panels, delivering consistent protection aligned with standard installation practices.