Square D QO3801021 Miniature Circuit Breaker – 80A – 3 Pole – 240V – Plug-In – Shunt Trip – QO Series

The Square D QO3801021 is a QO-series plug-in miniature circuit breaker designed for use in QO load centers, NQOD panelboards, and OEM distribution equipment. It provides thermal magnetic protection with both overload and short-circuit tripping, along with an integrated AC shunt trip feature for remote switching or emergency disconnection. This breaker is built for reliable performance in industrial, commercial, and light distribution applications.

Electrical Ratings

• Current Rating: 80 A
• Voltage Rating: 240 VAC
• Frequency: 50/60 Hz
• Phase: 3 Phase
• Poles: 3 Pole
• Interrupting Rating: 10 kA @ 240 VAC

Protection and Function

• Trip Technology: Thermal Magnetic
• Trip Function: Common Trip (Overload + Short-Circuit Protection)
• Additional Function: AC Shunt Trip (120/208/240 VAC)
• Protection Type: Branch circuit / feeder protection
• Application: Power distribution and switching control

Configuration and Function

• Series: QO Series (Square D / Schneider Electric)
• Model: QO
• Catalog Number: QO3801021
• Frame Type: QO Miniature Frame
• Mounting Style: Plug-On
• Terminal Type: Box Lug
• Compatibility: QO Load Centers, NQOD Panelboards, OEM interiors

Mechanical and Physical Characteristics

• Compact molded miniature breaker housing
• Plug-on installation for fast panel integration
• Integrated shunt trip coil for remote tripping capability
• Box lug terminals for secure conductor termination
• Designed for high-density panelboard applications
• Durable QO-frame construction for long service life

Standards and Certifications

• UL Listed
• CSA Certified
• Manufactured by Schneider Electric / Square D
• Designed to meet North American electrical distribution standards

Returns are easy

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

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.