HLD3400 - 400Amp Circuit Breaker

HLD3400 - 400Amp Circuit Breaker

The Eaton HLD3400 is a 400A, three-pole Series C molded-case circuit breaker designed for electrical systems requiring an HLD breaker in an L-frame configuration. The HLD3400 is supplied as a complete molded case circuit breaker and is UL Listed. If you're replacing an existing breaker, check the catalog number and all electrical and mechanical ratings rather than relying on amperage alone.

Key Features and Benefits

• 400A rating for electrical equipment designed around a 400-amp breaker.
• Three-pole design for compatible three-phase applications.
• Rated for 600 Vac and 250 Vdc.
• T186 trip type for applications requiring this specific trip configuration.
• HLD breaker type and L frame help simplify identification when matching an existing breaker.
• Supplied as a complete breaker, rather than an individual breaker component.
• Aluminum line and load terminals.
• Designed for 50–60 Hz AC systems within its specified ratings.
• UL Listed for applications where this certification is required.
  

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: HLD3400
  
• UPC: 786679006566
  
• Product Type: Molded case circuit breaker
  
• Series: Series C
  
• Breaker Type: HLD
  
• Frame: L
  
• Frame Type: Complete breaker
  
• Amperage Rating: 400 A
  
• Voltage Rating: 600 Vac, 250 Vdc
  
• Number of Poles: Three-pole
  
• Trip Type: T186
  
• Interrupt Rating: 100 kAIC at 240 Vac; 65 kAIC at 480 Vac
  
• Frequency Rating: 50–60 Hz
  
• Terminals: Line and load
  
• Terminal Material: Aluminum
  
• Length/Depth: 4.06 in
  
• Height: 8.25 in
  
• Width: 8.25 in
  
• Product Weight: 21 lb
  
• Certification: UL Listed
  

Material Compliance and Certifications

The HLD3400 is UL Listed and comes with aluminum line and load terminals. Its certification, terminal material, and electrical ratings should all be checked against the requirements of the equipment where the breaker will be installed.

Where It Works Best

The Eaton HLD3400 400A circuit breaker is intended for use with compatible commercial and industrial electrical distribution equipment requiring a Series C HLD, L-frame, three-pole molded-case circuit breaker with the ratings listed above.

It's especially relevant when maintaining existing equipment where preserving the original form, fit, and function is important. The combination of a 400A rating, T186 trip type, three-pole construction, L frame, and 600 Vac/250 Vdc voltage ratings gives electricians and maintenance teams a clear set of specifications to compare with the breaker being replaced.