Square D QO240GFI - 40A, 2-Pole, GFCI Ground-Fault Circuit Breaker

The Square D QO240GFI is a purpose-built 40A, 2-Pole GFCI Ground-Fault Circuit Breaker designed to deliver dependable protection in demanding panel environments. Built for industrial, commercial, and OEM applications, this unit combines precise overcurrent protection with advanced ground-fault sensing to help keep people and equipment safe in distribution panels, switchboards, and control panels.

• Current rating: 40A
• Poles: 2-Pole
• Breaker type: GFCI Ground-Fault Circuit Breaker
• Series/platform: Square D QO family, engineered for reliable performance in panels and motor control centers

Why this matters in real-world installations:

• The integrated GFCI function continuously monitors current balance between hot conductors and neutral, tripping on ground-fault conditions to reduce shock risk in high-activity environments.
• The 2-Pole design ensures both hot legs disconnect together when a fault is detected, preventing dangerous line-to-ground or line-to-line fault scenarios on 240V circuits.
• Ideal for panelboards, switchboards, and control panels in industrial facilities, commercial buildings, and OEM equipment where space and reliability are at a premium.
• Designed to integrate with standard QO enclosures and distribution configurations, providing a straightforward upgrade path from non-GFCI protection where required.

Use cases and scenarios where the QO240GFI shines:

• Motor control centers and feeder panels where ground fault protection is a safety-critical requirement
• Distribution panels in manufacturing lines, packaging systems, and processing equipment
• Commercial electrical rooms and service enclosures needing reliable fault interruption and personnel protection
• OEM installations demanding a compact, plug-in solution that pairs seamlessly with existing 240V circuits

Practical considerations and tips for use:

• Verify that your enclosure and wiring plan are compatible with a 2-Pole GFCI unit in the QO family to ensure proper fit and electrical clearance.
• Wire the line side to the appropriate L1/L2 terminals and connect the load side to the protected circuit, following standard electrical codes and torque specifications.
• Rely on the built-in ground-fault protection to maintain safety across medical, industrial, or harsh-duty environments where fault currents can occur.

Expand your protection strategy with the Square D QO240GFI — a field-ready solution that brings precise ground-fault sensing, reliable 40A protection, and the confidence of the trusted QO series to your distribution panels and motor control centers.