THLC434400 - 400Amp Circuit Breaker

THLC434400 - 400 Amp Circuit Breaker

Looking for a reliable 400A circuit breaker for your commercial or industrial setup? The THLC434400 Type THLC4 has you covered. This 3-pole breaker features a current-limiting, unfused design with a non-interchangeable trip unit, making it a straightforward solution for protecting circuits from overloads and short circuits. Load-side lugs are included, so installation is simple, and its compact size makes it an easy fit in existing electrical panels.

Built to last, this breaker isn’t flashy—it’s practical. It gives you the form, fit, and function you need to replace or maintain your legacy systems without fuss. With a high interrupting capacity of 150 kA at 480 VAC and 200 kA at 240 VAC, it handles demanding electrical environments without compromising safety.

Key Features and Benefits

• Handles 400 amps in three-phase systems
• 3-pole design for balanced power distribution
• Current-limiting to manage fault currents
• Fixed, non-interchangeable trip unit for consistent protection
• Unfused design—works where fuse protection isn’t needed
• Comes with load-side lugs for easy connection
• Compact size fits existing panels
• Interrupting ratings: 150kA @ 480VAC and 200kA @ 240VAC
  

Technical Specifications

• Part Number: THLC434400
  
• Type: THLC4
  
• Poles: 3
  
• Amperes: 400A
  
• Voltage & A.I.C. Rating: 150kA @ 480VAC; 200kA @ 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Style: Current Limiting, Unfused
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 13.06 in.
  • Width: 5.72 in.
  • Depth: 4.88 in.

Material Compliance and Certifications

• Installation Guidance: Install in line with local electrical codes and the breaker’s documentation.
• Verification: Always double-check ratings and certifications before use to make sure it fits your system.
  

Where It Works Best

• This breaker is ideal for commercial buildings, industrial plants, manufacturing facilities, and switchboards. Wherever you need a 400A, 3-pole current-limiting breaker that fits legacy equipment, the THLC434400 steps in without complications. It’s practical, dependable, and built for long-term use—exactly what electricians and facility managers look for in a direct replacement.