Q1B250 - 50 Amp Circuit Breaker

Q1B250 - 50 Amp Circuit Breaker

If you’re trying to match a Q1B250 circuit breaker in an existing electrical system, the details matter. The Q1B250 is a 50-amp, 2-pole thermal-magnetic circuit breaker with a bolt-on connection and a 10kA I.C.C. rating at 120/240 VAC. It measures 6.38 inches high, 1.5 inches wide, and 2.31 inches deep, and it requires four spaces. That combination of ratings, size, and mounting style makes this breaker particularly relevant for maintaining compatible legacy equipment where the existing application calls for a Type Q1B breaker. Instead of choosing a breaker based on amperage alone, check the part number, poles, voltage, interrupting rating, mounting method, and physical dimensions against the equipment you’re servicing. When those specifications match, the Q1B250 offers the form, fit, and function needed for the intended application. It’s a straightforward, durable component built to last in compatible electrical equipment when properly selected and installed.

Key Features and Benefits

• 50-amp rating for applications designed around this specific current rating.
• 2-pole design for compatible two-pole circuit applications.
• Bolt-on connection matches equipment designed to accept Type Q1B bolt-on breakers.
• Thermal-magnetic operation provides thermal and magnetic trip functions for circuit protection.
• Rated 10 kA.I.C. at 120/240 VAC.
• The Type Q1B configuration makes it useful for servicing compatible legacy electrical equipment.
• Requires four spaces, an important detail to check when confirming fit.
• Clearly defined dimensions help make physical compatibility easier to verify.
• Built to last for its intended electrical application when used within the specified ratings.

Technical Specifications

• Part Number: Q1B250
  
• Type: Q1B
  
• Breaker Style: Bolt-On Thermal Magnetic
  
• Amperage: 50 Amps
  
• Poles: 2
  
• Voltage: 120/240VAC
  
• A.I.C. Rating: 10k at 120/240VAC
  
• Height: 6.38 in.
  
• Width: 1.5 in.
  
• Depth: 2.31 in.
  
• Spaces Required: 4
  
• Mounting Style: Bolt-On
  

Material Compliance and Certifications

• Specific material compliance and certification information is not included in the available product specifications for the Q1B250. If a particular approval, listing, or material requirement is important for the installation, confirm that information using the markings and documentation supplied with the individual breaker. A qualified electrical professional should also verify that the breaker meets the requirements of the equipment, application, and applicable electrical codes.

Where It Works Best

• The Q1B250 makes the most sense when you’re maintaining or repairing compatible legacy electrical equipment that calls for a Type Q1B bolt-on circuit breaker. It is intended for applications requiring a 50-amp, 2-pole breaker rated 120/240 VAC with a 10 kA.I.C. rating, provided the equipment is designed for its mounting style and four-space configuration.