THLC434400WL - 400Amp Circuit Breaker

THLC434400WL - 400 Amp Circuit Breaker

The THLC434400WL is a 3-pole, 400-amp current-limiting circuit breaker designed for use in your commercial and industrial electrical distribution systems. Featuring a non-interchangeable trip unit, this breaker provides overcurrent protection while helping limit the effects of fault currents on connected equipment. Line and load-side lugs are included, allowing for straightforward installation in compatible equipment. With an interrupting capacity of 150kA at 480VAC and 200kA at 240VAC, the THLC434400WL is suited for applications where high available fault current levels are present. Its compact footprint helps you to simplify replacement projects where maintaining the original form and fit is important. Built for long-term service, this breaker remains a practical choice for maintaining existing electrical systems and equipment.

Key Features and Benefits

• 400-amp continuous current rating
• 3-pole design for three-phase electrical systems
• Current-limiting construction helps reduce the impact of short-circuit events
• Non-interchangeable trip unit
• Includes line and load-side lugs
• Compact design for use in compatible panel and switchgear applications
• Built for long service life in demanding electrical environments
  

Technical Specifications

• Part Number: THLC434400WL
  
• Type: THLC4
  
• Poles: 3
  
• Amperes: 400A
  
• Interrupting Rating: 150kA @ 480VAC
  
• Interrupting Rating: 200kA @ 240VAC
  
• Dimensions:
  • Height: 13.06 in.
  • Width: 5.72 in.
  • Depth: 4.88 in.
• Trip Unit: Non-Interchangeable
  
• Additional Features: Include Line and Load-Side Lugs
  
• Configuration: Unfused Current Limiting Circuit Breaker
  

Material Compliance and Certifications

• Industry Standards: Manufactured for use in accordance with applicable electrical industry standards.
• Equipment Compatibility: Suitable for installation in properly rated and compatible electrical equipment.
• Installation Requirements: Verify local code requirements and application specifications before installation.
  

Where It Works Best

• The THLC434400WL is commonly used in commercial buildings, manufacturing facilities, distribution equipment, and other industrial power systems that require a 400-amp, 3-pole circuit breaker. It is particularly well-suited for maintenance, repair, and replacement projects where matching existing equipment specifications is essential. When proper fit, electrical ratings, and compatibility matter, this breaker offers a practical solution for keeping established systems operational.