Square D QO340GFI Ground Fault Circuit Breaker – 40A – 3 Pole – 208Y/120VAC – Plug-On – 6mA GFI – QO Series

The Square D QO340GFI is a QO-series three-pole ground fault circuit interrupter designed for use in 208Y/120VAC systems. It provides thermal magnetic overcurrent protection combined with 6mA ground fault sensing for enhanced personnel safety. This breaker includes a pigtail neutral and is intended for installation in QO load centers, NQOD panelboards, and OEM distribution equipment. It is commonly used in commercial and industrial environments where ground fault protection is required for three-phase circuits.

Electrical Ratings

• Current Rating: 40 A
• Voltage Rating: 208Y/120 VAC
• Frequency: 50/60 Hz
• Phase: 3 Phase
• Poles: 3 Pole
• Interrupting Rating: 10 kA @ 208Y/120 VAC
• Ground Fault Sensitivity: 6 mA

Protection and Function

• Trip Technology: Thermal Magnetic + Ground Fault (GFI/GFCI)
• Trip Function: Common Trip (Overload + Short-Circuit + Ground Fault)
• Protection Type: Personnel protection (shock hazard protection)
• Application: Commercial and industrial distribution systems requiring ground fault protection

Configuration and Function

• Series: QO Series (Square D / Schneider Electric)
• Model: QO340GFI
• Catalog Number: QO340GFI
• Frame Type: QO Miniature Frame
• Mounting Style: Plug-On
• Terminal Type: Box Lug
• Neutral Type: Pigtail neutral included
• Compatibility: QO Load Centers, NQOD Panelboards, OEM interiors / Speed-D switchboards

Mechanical and Physical Characteristics

• Compact molded breaker housing
• Plug-on installation for QO system compatibility
• Integrated ground fault detection module (6mA sensitivity)
• Pigtail neutral lead for sensing circuitry
• Box lug terminals for secure conductor termination
• Wire range: 14–6 AWG copper, 12–4 AWG aluminum
• Designed for three-phase distribution systems
• Standard QO-frame construction

Standards and Certifications

• UL Listed
• CSA Certified
• Manufactured by Schneider Electric / Square D
• Designed for North American electrical safety standards

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You may return items within 30 days of delivery for a refund.

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