QOB3501021 - 50A Circuit Breaker

QOB3501021 - 50A Circuit Breaker

The QOB3501021 is a 50-amp, 3-pole bolt-on circuit breaker built for dependable circuit protection in commercial and industrial electrical systems. Designed for use in compatible QOB panelboards, it helps protect wiring and equipment from overloads and short circuits while providing the secure connection that bolt-on breakers are known for.

One feature that makes this model especially useful is the factory-installed 120 VAC shunt-trip device. Instead of relying solely on manual operation, the breaker can be tripped remotely when it's connected to an external control circuit. That's a practical solution for emergency stop stations, fire alarm systems, safety interlocks, or anywhere power may need to be disconnected quickly from a remote location.

Rated 10kA at 240VAC, the QOB3501021 is well-suited for a wide range of everyday electrical applications. Whether you're replacing an existing breaker during maintenance or installing one in a new panel, this model offers the protection and remote-trip capability many facilities depend on. It's a straightforward choice when you need a 50-amp QOB bolt-on circuit breaker with a 120VAC shunt trip, without adding unnecessary complexity.

Key Features and Benefits

• 50 Amp Current Rating: 50 amp current rating.
• Three-Pole Design: Three-pole design for three-phase electrical systems.
• Bolt-On Mounting: Bolt-on mounting for a secure installation.
• 120VAC Shunt Trip: Factory-installed 120VAC shunt trip for remote breaker operation.
• 10kA Interrupting Rating: 10kA interrupting rating at 240VAC.
• Circuit Protection: Helps protect equipment against overloads and short circuits.
• Remote Disconnect Capability: Suitable for emergency shutdown and remote disconnect applications.
• Compact Design: Compact design for compatible QOB panelboards.
  

Technical Specifications

• Part Number: QOB3501021
  
• Type: QOB
  
• Poles: 3
  
• Amperage: 50 Amps
  
• Interrupting Rating: 10kA
  
• Voltage Rating: 240VAC
  
• Shunt Trip Voltage: 120VAC
  
• Mounting: Bolt-On
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 3.0 in.
  • Depth: 2.5 in.

Material Compliance and Certifications

• Industry Standards: The QOB3501021 is manufactured for use in compatible electrical distribution equipment and is designed to meet applicable industry performance standards for molded case circuit breakers.
• Installation Guidance: For safe operation, installation should be completed by qualified personnel in accordance with local electrical codes and the equipment manufacturer's recommendations.
  

Where It Works Best

• This breaker is commonly used in applications where both circuit protection and remote tripping are important, including:
  • Commercial buildings
  • Industrial facilities
  • Manufacturing equipment
  • HVAC systems
  • Fire alarm interfaces
  • Emergency shutdown systems
  • Mechanical rooms
  • Electrical distribution panelboards