Q1B120 - 20 Amp Circuit Breaker

Q1B120 - 20 Amp Circuit Breaker

When you're replacing a breaker in existing equipment, getting the details right matters. The Q1B120 is a 20-amp, 1-pole Type Q1B thermal-magnetic circuit breaker with a bolt-on connection. It's rated 10 kA I.C. at 120 VAC and requires two spaces in compatible equipment.

For anyone maintaining older electrical systems, the Q1B120 is especially useful when the goal is to match what's already there. Instead of relying on appearance alone, check the breaker type, amperage, voltage, pole count, mounting style, dimensions, and interrupting rating. The Q1B120 measures 6.38 inches high, 0.75 inches wide, and 2.31 inches deep. When those specifications match your equipment's requirements, this breaker provides the form, fit, and function needed for the application. It's a straightforward, built-to-last component for keeping compatible legacy electrical equipment in service.

Key Features and Benefits

• 20-amp, 1-pole breaker for compatible 120 VAC applications
• 10 kA.I.C. at 120 VAC
• Thermal-magnetic trip operation
• Bolt-on connection for equipment designed for this mounting style
• Type Q1B configuration
• Requires two spaces
• Useful for maintaining compatible legacy electrical equipment
• Clearly defined dimensions make it easier to check physical fit before installation
• Built to last when correctly selected and used within its specified ratings

Technical Specifications

• Part Number: Q1B120
  
• Type: Q1B
  
• Breaker Type: Bolt-On Thermal Magnetic Circuit Breaker
  
• Amperage: 20A
  
• Poles: 1
  
• Voltage: 120VAC
  
• A.I.C. Rating: 10k
  
• A.I.C. Rating & Voltage: 10k @ 120VAC
  
• Height: 6.38 in.
  
• Width: 0.75 in.
  
• Depth: 2.31 in.
  
• Mounting: Bolt-On
  
• Spaces Required: 2
  

Material Compliance and Certifications

• Specific material-compliance information and certification details were not included in the available specifications for the Q1B120. Because these details can matter in electrical applications, we don't make assumptions about UL, CSA, RoHS, or other certifications when documentation isn't available. Check the breaker label and applicable equipment documentation when a particular certification or compliance requirement needs to be confirmed.

Where It Works Best

• The Q1B120 circuit breaker is intended for existing electrical equipment that is compatible with Type Q1B bolt-on breakers. It's a practical fit for maintenance and replacement work where the original application calls for a 20A, 1-pole, 120VAC breaker with a 10kA.i.c. rating, and the equipment provides the required two spaces.
  
• If you're replacing an existing breaker, don't go by amperage alone. Check the Q1B type, pole count, voltage, A.I.C. rating, bolt-on mounting configuration, dimensions, and space requirement against the existing breaker and equipment documentation. That's the simplest way to determine whether the Q1B120 is the correct form, fit, and functional match for the application.
  
• Installation and final compatibility should be confirmed by a qualified electrical professional and comply with applicable electrical codes and equipment requirements.