TJD432400 **Older Style** - 400Amp Circuit Breaker

TJD432400 **Older Style** - 400 Amp Circuit Breaker

The TJD432400 Older Style Black Face molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems requiring a 400 amp, 3 pole breaker configuration. Built as part of the trusted Q-Line family, this Type TJD circuit breaker features a bolt-on mounting design with an internal common trip mechanism that helps you to disconnect all poles simultaneously during overloads or short circuits. Its 22kA interrupting rating at 240VAC makes it suitable for applications where consistent fault protection and compatibility with existing electrical equipment are essential. The included load-side lugs help simplify installation, while the HACR rating supports use in heating, air conditioning, and refrigeration equipment applications. With its older style black face configuration, this breaker is commonly used as a direct replacement in legacy panelboards and switchgear setups where maintaining original fit and function matters. Built with durability in mind, the TJD432400 continues to serve as a practical solution for maintaining existing power distribution systems.

Key Features and Benefits

• 400 Amp Capacity: for high-current commercial and industrial electrical systems
• 3 Pole Design: supports three-phase power distribution applications
• 22kA @ 240VAC Interrupting Rating: helps protect equipment from fault conditions
• Bolt-On Mounting Configuration: provides secure installation in compatible equipment
• Internal Common Trip Mechanism: disconnects all poles simultaneously during overloads or short circuits
• HACR Rated: for heating, air conditioning, and refrigeration system applications
• Includes Load-Side Lugs: for added installation convenience
• Older Style Black Face Design: supports compatibility with existing legacy electrical systems
• Part of the proven Q-Line circuit breaker family
• Molded case construction: designed for long-term service in demanding environments
  

Technical Specifications

• Part Number: TJD432400
  
• Manufacturer Series: Q-Line
  
• Type: TJD
  
• Product Category: Molded Case Circuit Breaker
  
• Poles: 3
  
• Amperes: 400A
  
• A.I.C. Rating: 22kA
  
• Voltage Rating: 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.
• Face Style: Older Style Black Face
  

Material Compliance and Certifications

• HACR Rated: for approved HVAC and refrigeration applications
• Industry Standards: Manufactured to meet applicable molded case circuit breaker industry standards
• Commercial and Industrial Use: Designed for use in compatible commercial and industrial electrical distribution systems
• Molded Case Construction: intended for long-lasting operational service
  

Where It Works Best

• The TJD432400 is commonly used in commercial buildings and facilities, industrial power distribution systems, HVAC equipment disconnect and protection applications, manufacturing facilities, electrical panelboards and switchgear requiring Type TJD compatibility, maintenance and replacement projects involving legacy Q-Line systems, and three-phase electrical infrastructure requiring a 400 amp breaker configuration. Its older style black face design makes it especially useful when maintaining consistency within existing installations where matching dimensions, mounting style, and electrical ratings are important.