Q1B250 - 50 Amp Circuit Breaker

Q1B250 - 50 Amp Circuit Breaker

Powering legacy systems? The Q1B250 50 A 2-pole circuit breaker is engineered for dependable protection in both residential and light commercial panels. It uses a combined thermal and magnetic trip mechanism that senses overloads and short circuits, helping prevent damage to wiring and equipment. With an interrupting capacity of 10,000 A at 120/240 VAC, it offers assurance that your system stays protected even when unexpected spikes occur.

Key Features and Benefits

• Thermal-Magnetic Trip Technology: A balanced combo of slow thermal response for overloads and fast magnetic action for short circuits, giving you broad-spectrum protection.
• Space-Saving Footprint: Occupies just four panel spaces, making it ideal when swapping into existing setups without major rearrangements.
• Bolt-On Mounting: Provides a tight, secure connection that resists loosening over time — especially useful in environments subject to vibration or settling.
• Long-Life Performance: Built from quality materials to endure repeated cycling, exposure to operational stress, and long service life.
  

Technical Specifications

• Frame Type: Q1B
  
• Poles: 2
  
• Amperage: 50 A
  
• Interrupting Capacity:
  • 10,000 A @ 120/240 VAC
• Required Panel Spaces: 4
  
• Dimensions:
  • Width: 1.50″
  • Length: 6.38″
  • Depth: 2.31″
• Weight: 3.50 lb
  

Material Compliance and Certifications

• UL Listing: This unit is UL-listed, confirming it meets independent safety and performance standards.
• Environmental Compliance: The materials used adhere to strict electrical and environmental guidelines, ensuring you get not just protection—but peace of mind. (Where the interrupting rating is marked, it helps installers check for compliance with NEC 110.9).
  

Where It Works Best

• Use the Q1B250 when maintaining, upgrading, or repairing existing electrical systems in homes, workshops, or small commercial installations. It is especially suited when you need compatibility with older panel frames and replacement components. It’s not best for new systems requiring higher fault-current ratings—but for many retrofit tasks, it's an excellent match.