TJD422400 - 400Amp Circuit Breaker

TJD422400 - 400 Amp Circuit Breaker

The TJD422400 molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems requiring a 400 amp, 2-pole configuration. Built as part of the trusted Q-Line series, this bolt-on breaker features an internal common trip mechanism that helps you to protect connected equipment by disconnecting both poles simultaneously during overloads or short circuits. With a 22k A.I.C. rating at 240VAC and HACR classification, the TJD422400 is commonly used in HVAC systems, panelboards, switchboards, and other demanding power distribution applications where consistent performance and compatibility matter. Its molded case construction is built to last, while included load-side lugs help simplify installation and connection in the field.

Whether you are replacing an existing breaker in a legacy electrical system or maintaining facility operations, the TJD422400 offers the form, fit, and function needed for compatible installations. The bolt-on mounting style provides a secure connection within approved electrical assemblies, making it a practical solution for contractors, maintenance teams, and facility managers who need reliable overcurrent protection for high-amperage circuits.

Key Features and Benefits

• 400 amp molded case circuit breaker: Designed for commercial and industrial power distribution.
• 2-pole configuration: Includes internal common trip protection.
• Q-Line series breaker: Features a bolt-on mounting style for secure installation.
• 22k A.I.C. rating: Rated for 22k A.I.C. at 240VAC.
• HACR rated: Suitable for heating, air conditioning, and refrigeration applications.
• Included load-side lugs: Help simplify field wiring connections.
• Molded case construction: Helps provide dependable circuit interruption and equipment protection.
• Built for compatibility: Designed for use in existing electrical distribution systems and panel applications.
  

Technical Specifications

• Part Number: TJD422400
  
• Type: TJD
  
• Product Category: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Poles: 2
  
• Amperage: 400A
  
• Voltage Rating: 240VAC
  
• A.I.C. Rating: 22kA @ 240VAC
  
• Mounting Style: Bolt-On
  
• Trip Type: Internal Common Trip
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Rated for HVAC and refrigeration system applications.
• Compatible Equipment: Manufactured for use in compatible electrical distribution equipment.
• Molded Case Construction: Designed for industrial and commercial environments.
• Industry Standards: Designed to meet applicable industry standards for circuit protection and overcurrent interruption.
  

Where It Works Best

• The TJD422400 circuit breaker is well suited for commercial buildings, industrial facilities, HVAC systems, manufacturing equipment, and large electrical distribution panels that require a 400 amp, 2-pole breaker configuration. It is commonly used in applications where dependable overcurrent protection and compatibility with existing Q-Line electrical systems are essential. This breaker is especially useful for maintenance replacements, retrofit projects, and ongoing facility electrical support where matching specifications and fit are critical.