Square D | QO1151021 | Circuit Breaker | 15A | 1-Pole | 240V | Plug-In

Introducing the Square D QO1151021 circuit breaker—a trusted plug-in protector engineered for Square D QO panels. With a 15A rating, 1-Pole configuration, and 240V capability, this breaker is a precise solution for maintenance, retrofit, and replacement projects where exact specs matter.

• Amperage: 15A
• Poles: 1-Pole
• Voltage: 240V
• Design: Plug-In for quick, tool-free installation in compatible panels
• Part reference: QO1151021 — the best reference to verify compatibility before ordering

Why this plug-in breaker fits your Square D panel needs

The QO1151021 is purpose-built for Square D QO series panels, delivering reliable overcurrent protection when you’re performing routine maintenance, a retrofit, or a straightforward replacement. The plug-in design minimizes downtime and simplifies the swap process, making it a practical choice for both professional electricians and skilled homeowners working with compatible panels.

Ideal use cases

• Replacing a failed or worn-out 15A, 240V, 1-Pole breaker in a QO panel
• Retrofits where a 15A, single-pole, 240V circuit needs dedicated protection
• Maintenance updates to restore proper distribution for 240V branch circuits in residential or light commercial settings

How to ensure the right fit

Before ordering, confirm that your installation matches the listed specifications and that your panel accepts plug-in QO breakers. The part number is the best compatibility reference, so use QO1151021 to verify against your panel’s requirements. If in doubt, consult the panel’s documentation or a qualified electrician to avoid mismatches or unsafe installations.

Practical guidance for installation and care

• Power down the main disconnect and verify circuits are de-energized before replacing any breaker
• Ensure the panel is a compatible QO series model that accepts plug-in breakers
• Inspect the breaker slot and surrounding bus stab connections for cleanliness and integrity before seating the new unit
• After installation, restore power and test the circuit to confirm proper operation and trip response

Designed for reliable performance in the right Square D QO panel environments, the QO1151021 delivers targeted 15A protection for 240V circuits when you need a precise, straightforward replacement. Equip your panel with this plug-in breaker to maintain safe, consistent electrical distribution and reduce downtime during maintenance or upgrades.