Q1B290 - 90 Amp Circuit Breaker

Q1B290 - 90 Amp Circuit Breaker

Finding the right breaker for older electrical equipment often comes down to the details. The Q1B290 is a 90-amp, 2-pole thermal magnetic circuit breaker with a bolt-on connection. It is a Type Q1B breaker, rated 10 kA.I.C. at 120/240 VAC, and requires four spaces. The breaker measures 6.38 inches high, 1.5 inches wide, and 2.31 inches deep. If you're replacing an existing Q1B290, those specifications are worth checking carefully against the breaker and equipment already in place. Amperage is only part of the match. Pole count, voltage, A.I.C. rating, mounting style, dimensions, and available space matter too. For compatible legacy equipment that calls for this configuration, the Q1B290 offers the form, fit, and function needed for maintenance or replacement work. It's a practical, straightforward breaker that's built to last when installed correctly and used within its stated ratings.

Key Features and Benefits

• 90-amp rating for applications requiring a 90A breaker.
• Two poles for the required 2-pole circuit configuration.
• Bolt-on mounting for compatible Q1B electrical equipment.
• Thermal-magnetic operation provides overcurrent protection.
• Rated 120/240VAC with a 10k A.I.C. rating.
• Requires four spaces, an important detail when checking physical fit.
• Useful for maintenance and replacement in compatible legacy systems where the original breaker specifications need to be matched.
• Built to last when properly installed and operated within its specified ratings.

Technical Specifications

• Part Number: Q1B290
  
• Type: Q1B
  
• Amperage: 90 Amps
  
• Poles: 2
  
• Voltage: 120/240VAC
  
• A.I.C. Rating: 10k @ 120/240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting Style: Bolt-On
  
• Spaces Required: 4
  
• Height: 6.38 in.
  
• Width: 1.5 in.
  
• Depth: 2.31 in.
  

Material Compliance and Certifications

• Specific material compliance information and certification details were not provided with the available specifications for the Q1B290. If a particular certification or material requirement applies to your installation, verify it using the markings on the breaker and the appropriate technical documentation. Electrical installations should also follow applicable codes and equipment requirements.

Where It Works Best

• The Q1B290 is intended for existing electrical equipment that requires a Type Q1B 90-amp, 2-pole bolt-on circuit breaker with matching specifications. That makes it especially relevant for maintenance and functional replacement work involving compatible legacy systems.