Square D Q1240 40A 2P Circuit Breaker | AmpState

The Square D Q1240 40A 2P Circuit Breaker from AmpState is a trusted protector for panelboards, load centers, and electrical distribution networks, delivering precise 40-amp, two-pole protection to keep circuits safe and equipment protected.

Engineered for Retrofit work and maintenance planning when the part number must stay consistent, the Q1240 offers a reliable, drop-in replacement that preserves your existing Square D configuration while enabling updates to aging infrastructure.

• 40 Amps, 2-Pole design for robust protection across two energized conductors.
• Panelboard and load center compatibility—a standard choice for Square D installations.
• Part-number consistency—perfect for retrofit projects where the exact Q1240 part must be maintained.
• Reliable, known performance from Square D engineering, designed for steady trip characteristics in distribution systems.
• AmpState availability—secure supply for replacements and ongoing maintenance.

Common use cases include replacing failed or obsolete breakers in existing panelboards, upgrading circuits in commercial and residential distribution systems, and stocking a spare for planned maintenance so you can swap in minutes rather than chase parts last minute.

Compatibility & fit — Part Number: Q1240; 40 A; 2 Poles; Square D; designed for panelboards, load centers, and electrical distribution. If you’re unsure about compatibility, send us a message and we’ll help confirm fit and ensure you’re choosing the right replacement.

Choose the Square D Q1240 40A 2P Circuit Breaker from AmpState for a dependable, ready-to-install protection solution that aligns with your existing electrical system and maintenance plans.