Square D QOB350 3-Pole 50-Amp Bolt-On Circuit Breaker

Introducing QO/QOB Circuit Breakers: Reliable Overcurrent Protection

Experience top-tier overcurrent protection and seamless switching for AC systems with our QO and QOB thermal magnetic circuit breakers. Engineered with precision, these circuit breakers boast an over center, trip-free toggle mechanism, ensuring swift action with quick make and quick break functionality. Featuring positive handle indication, our circuit breakers offer ease of use and peace of mind.

Key Features:

• Overcurrent protection and switching for AC systems
• Over center, trip-free toggle mechanism
• Quick make, quick break action
• Positive handle indication
• VisiTrip trip indication for visual confirmation of tripped circuit

Product Specifications:

• Range: QO
• Current Rating: 50 A
• Voltage Rating:
  • 120/240 V AC
  • 240 V AC
  • 120 V AC
• Mounting Type: Bolt-on
• Number of Poles: 3P
• Circuit Breaker Type: Standard
• Interrupt Rating: 10 kA
• Number of Panel Spaces: 3
• Wire Size: AWG 8 to AWG 2 (copper or aluminum)
• Tightening Torque: 44.25 lbf.in (5 N.m)
• Dimensions:
  • Height: 3.11 in (79 mm)
  • Width: 2.24 in (57 mm)
  • Depth: 2.91 in (74 mm)
• Net Weight: 0.85 lb (0.386 kg)
• Certifications: UL Listed, CSA Certified
• Ambient Rating: 104 °F (40 °C)

Additional Options: Explore our full line of factory-installed accessories, including shunt trips, auxiliary switches, and alarm switches, designed to enhance functionality and customization.

Certifications: Our QO circuit breakers are UL Listed under UL File E84967 and CSA Certified under CSA Master Contract 153555.

Ensure the safety and efficiency of your electrical systems with our QO/QOB circuit breakers. Trust in quality, reliability, and performance.