Q1B320 - 20 Amp Circuit Breaker

Q1B320 - 20 Amp Circuit Breaker

When you’re replacing a breaker in existing equipment, the details have to match. The Q1B320 is a 20-amp, 3-pole thermal magnetic circuit breaker with a bolt-on mounting design. It is a Type Q1B breaker, rated 10 kAIC at 240 VAC, and requires six spaces in compatible equipment.

For maintenance and replacement work, the combination of ratings and physical dimensions matters. The Q1B320 measures 6.38 inches high, 2.25 inches wide, and 2.31 inches deep. Its thermal-magnetic operation provides overload and short-circuit protection, while the bolt-on design provides the mounting configuration required for equipment designed for this breaker type.

Working on older electrical equipment can sometimes make finding the right replacement less straightforward. Rather than choosing a breaker based on amperage alone, compare the part number, number of poles, voltage, interrupting rating, mounting style, dimensions, and space requirements to those of the breaker being replaced. When those specifications line up with your application, the Q1B320 provides the form, fit, and function needed to keep compatible equipment in service. It’s a straightforward, purpose-built breaker made to last when correctly applied and installed.

Key Features and Benefits

• 20-amp rating for applications requiring this specific circuit capacity.
• Three-pole design for compatible three-phase applications.
• Thermal-magnetic operation provides overload and short-circuit protection.
• 10 kAIC at 240 VAC interrupting rating.
• Bolt-on mounting for equipment designed around this connection style.
• Type Q1B configuration for compatible existing electrical equipment.
• Six-space requirement makes it easy to check panel space as part of the fit verification.
• Built to last when properly installed and used within its specified electrical ratings.

Technical Specifications

• Part Number: Q1B320
  
• Type: Q1B
  
• Breaker Type: Thermal Magnetic
  
• Mounting Style: Bolt-On
  
• Amperage: 20 Amps
  
• Poles: 3
  
• AIC Rating & Voltage: 10k @ 240VAC
  
• Height: 6.38 in.
  
• Width: 2.25 in.
  
• Depth: 2.31 in.
  
• Spaces Required: 6
  

Material Compliance and Certifications

• Specific agency certifications, listing numbers, and material compliance information were not included with the available specifications for the Q1B320. These details should be confirmed from the breaker label or the applicable product documentation when required for a particular installation.
• Electrical code requirements and equipment specifications can vary by application. A qualified electrical professional should therefore verify compatibility and installation.

Where It Works Best

• The Q1B320 circuit breaker is intended for existing electrical distribution equipment that calls for a Type Q1B bolt-on breaker with matching ratings and dimensions. It is especially useful in maintenance and replacement situations where the goal is to preserve the original equipment configuration rather than change it.
• Before using the Q1B320 as a replacement, check more than the amperage. Confirm that your application requires 20 amps, three poles, 10k AIC at 240VAC, bolt-on mounting, and six spaces. It’s also worth checking the physical dimensions against the existing breaker and equipment.