Square D QOB1151021 QO Bolt-On Miniature Circuit Breaker – 15A – 1 Pole – 120/240V – Shunt Trip – QO Series

The Square D QOB1151021 is a QO-series bolt-on miniature circuit breaker designed for use in NQ panelboards and lighting/appliance branch circuit protection. It combines thermal magnetic overcurrent protection with an integrated AC shunt trip feature, allowing remote tripping in addition to standard protection. Its compact QO frame design makes it suitable for tight panelboard installations requiring reliable switching and safety control.

Electrical Ratings

• Current Rating: 15 A
• Voltage Rating: 120/240 VAC (50/60 Hz)
• DC Rating: 48 VDC
• Phase: 1 Phase
• Poles: 1 Pole
• Interrupting Rating:
  • 10 kA @ 120/240 VAC (UL/CSA)
  • 5 kA @ 48 VDC

Protection and Function

• Trip Technology: Thermal Magnetic
• Trip Function: Overload and Short-Circuit Protection
• Additional Function: AC Shunt Trip (120/208/240 VAC)
• Protection Type: Branch circuit protection with remote disconnect capability
• Application: Appliance and lighting circuits

Configuration and Function

• Series: QO / QOB Bolt-On Series
• Model: QOB
• Catalog Number: QOB1151021
• Frame Type: QO Miniature Frame
• Mounting Style: Bolt-On
• Terminal Type: Pressure Plate
• Used On: NQ Series Panelboards

Mechanical and Physical Characteristics

• Compact miniature breaker construction
• Bolt-on mounting for secure installation in panelboards
• Integrated Visi-Trip indicator for fault identification
• Designed for branch circuit applications in residential/commercial panels
• Space-saving QO frame architecture

Standards and Certifications

• UL Listed
• CSA Certified
• Manufactured by Schneider Electric / Square D
• Compliant with North American electrical installation standards

Returns are easy

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

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