QOB350 **Older Style** 50A Circuit Breaker

QOB350 **Older Style** 50A Circuit Breaker

When you need a QOB350 Older Style bolt-on circuit breaker that matches the original form, fit, and function of your existing electrical system, choosing the right replacement is important. This 50-amp, 3-pole QOB circuit breaker is designed for compatible panelboards that require a bolt-on mounting configuration and features a 10kA I.C. rating at 240VAC for dependable protection against overloads and short circuits. Its older-style design makes it an excellent choice for maintaining existing commercial, industrial, or institutional electrical systems without altering the original equipment layout. Built to last, the QOB350 helps keep compatible electrical distribution systems operating as intended while providing the protection expected from a properly matched circuit breaker.

Key Features and Benefits

• Part Number: QOB350 (Older Style).
• 50 Amp Current Rating: 50 Amp Current Rating for compatible branch circuit applications.
• 3-Pole Configuration: 3-Pole Configuration is designed for three-phase electrical systems.
• Bolt-On Mounting: Bolt-On Mounting provides a secure connection in compatible panelboards.
• 10k A.I.C. Rating: 10k A.I.C. Rating at 240VAC for use in appropriately rated electrical systems.
• Older Style Design: Older Style Design offers the correct form, fit, and functional replacement for compatible legacy installations.
• Built to Last: Built to last for dependable service in properly maintained electrical systems.
• Original Configuration: Helps maintain the original Configuration of compatible equipment without requiring modifications.
  

Technical Specifications

• Part Number: QOB350 (Older Style)
  
• Type: QOB
  
• Mounting Style: Bolt-On
  
• Poles: 3
  
• Amperage: 50 Amps
  
• Interrupting Rating: 10k A.I.C. @ 240VAC
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 2.25 in.
  • Depth: 2.5 in.

Material Compliance and Certifications

• Equipment Compatibility: Designed for use in applications requiring a QOB-style bolt-on circuit breaker with matching electrical ratings and physical dimensions.
• Industry Standards: Manufactured to meet applicable industry standards for circuit protection when installed in compatible equipment.
• Installation Requirements: Installation should be completed in accordance with the National Electrical Code (NEC) and all applicable local electrical codes.
• Compatibility Verification: Compatibility with the existing panelboard and electrical system should always be confirmed before installation.
  

Where It Works Best

• The QOB350 Older Style is a practical solution for maintaining compatible commercial, industrial, and institutional electrical distribution systems that use QOB bolt-on circuit breakers. Whether you're replacing a worn breaker during routine maintenance or restoring an existing panel to proper operating condition, this 50-amp 3-pole circuit breaker provides the correct form, fit, and function for compatible legacy equipment. It's especially well-suited for facilities that want to preserve their existing electrical infrastructure while using components that match the original system specifications.