QB50 - 50 Amp Circuit Breaker

QB50 - 50 Amp Circuit Breaker

The QB50 Bolt-On Circuit Breaker is a 50-amp, single-pole breaker made for your electrical applications that require dependable circuit protection in a compatible QB panel system. It helps you protect circuits from overloads and short circuits while allowing electrical systems to operate safely and efficiently. Rated at 120VAC with a 10kA interrupting capacity, the QB50 is a practical option for maintenance work, replacement installations, and electrical projects where the correct breaker specifications matter.

With its bolt-on design, the QB50 provides a secure connection point within compatible panelboards. Its compact size makes it a convenient choice when available panel space is limited, measuring only 0.75 inches wide while still providing 50-amp protection. For electricians, contractors, and facility maintenance professionals, having the right breaker on hand can make repairs and upgrades easier, and the QB50 delivers the specifications needed for many common electrical protection applications.

Key Features and Benefits

• 50 Amp Rating: Protects circuits requiring a 50 Amp breaker.
• Single-Pole Configuration: Suitable for applications where a single circuit requires dedicated protection.
• 10kA Interrupting Capacity: Helps disconnect fault currents safely up to its rated capacity.
• 120VAC Operation: Designed for electrical systems requiring a 120-volt circuit breaker.
• Bolt-On Mounting: Allows for secure installation in compatible electrical panel equipment.
• Compact Profile: The 0.75-inch width helps maximize available space inside the panel.
• Replacement-Friendly Design: A useful option for matching existing QB-type breaker installations.

Technical Specifications

• Part Number: QB50
  
• Type: QB
  
• Mounting Style: Bolt-On
  
• Poles: 1
  
• Amperage: 50 Amps
  
• Voltage Rating: 120VAC
  
• A.I.C. Rating: 10kA
  
• Height: 4.81 inches
  
• Width: 0.75 inches
  
• Depth: 2.5 inches
  

Material Compliance and Certifications

• The QB50 Bolt-On Circuit Breaker is manufactured for use in properly matched electrical distribution equipment and is intended to provide safe circuit protection when installed correctly. Electrical installations should always follow applicable codes, safety practices, and equipment requirements. Before installation, confirm that the breaker specifications match the existing panel and application.

Where It Works Best

• The QB50 is a good fit for commercial buildings, industrial facilities, electrical maintenance applications, and other environments that use compatible QB-type bolt-on panel systems. It is commonly used to replace an existing breaker or to complete electrical work that requires a 50-amp single-pole circuit breaker.