SLD69400NT - 400Amp Circuit Breaker

SLD69400NT - 400Amp Circuit Breaker

The SLD69400NT is a 3-pole, 400-amp thermal magnetic molded case circuit breaker designed for use in your electrical distribution systems requiring dependable overcurrent and short-circuit protection. Built on the SLD600A frame, this breaker features an adjustable trip unit that allows qualified personnel to tailor protection settings to the requirements of the connected equipment and application. Adjustable functions include continuous current setting, long-time delay, instantaneous setting, short-time pickup, short-time delay, and short-time I²t pickup, providing flexibility for coordination within existing power distribution systems. Designed to deliver proper form, fit, and function when replacing compatible breakers in legacy installations, the SLD69400NT is built to last and helps you to minimize downtime during maintenance or repairs. Please note that lug terminals are not included with this breaker and must be supplied separately if required for your installation.

Key Features and Benefits

• Current Rating: 400 Amp continuous current rating.
• 3-Pole Configuration: 3-pole configuration for three-phase power distribution systems.
• Thermal Magnetic Trip Mechanism: Thermal magnetic trip mechanism for overload and short-circuit protection.
• Frame Design: SLD600A frame design.
• Adjustable Trip Unit: Continuous Current Setting, Long Time Delay, Instantaneous Setting, Short Time Pickup, Short Time Delay, and Short Time I²t Pickup.
• Interrupting Ratings: 25kA @ 600VAC, 35kA @ 480VAC, and 65kA @ 240VAC.
• Replacement Design: Designed for form, fit, and functional replacement in compatible electrical systems.
• Built to Last: Built to last in demanding commercial and industrial environments.
• Lug Terminals: Lug terminals are not included.
  

Technical Specifications

• Part Number: SLD69400NT
  
• Type: SLD6-A
  
• Frame Size: SLD600A
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Trip Unit: Thermal Magnetic
  
• Poles: 3
  
• Amperes: 400A
  
• Interrupting Capacity: 25kA @ 600VAC; 35kA @ 480VAC; 65kA @ 240VAC
  
• Dimensions:
  • Height: 11.0 in.
  • Width: 7.5 in.
  • Depth: 4.0 in.
• Adjustable Functions: Continuous Current Setting, Long Time Delay, Instantaneous Setting, Short Time Pickup, Short Time Delay, Short Time I²t Pickup
  
• Lug Terminals: Not Included
  

Material Compliance and Certifications

• Construction: Thermal magnetic molded case circuit breaker construction.
• Application: Manufactured for installation in compatible electrical distribution equipment.
• Frame Platform: Designed to meet the electrical ratings specified for the SLD600A frame platform.
• Compatibility: Always verify compatibility, interrupting capacity, and installation requirements before placing the breaker into service.
• Installation Requirements: Installation and adjustment should be performed by qualified electrical personnel in accordance with applicable electrical codes and manufacturer specifications.
  

Where It Works Best

• The SLD69400NT is well suited for commercial and industrial electrical distribution systems where a 400-amp, 3-pole molded case circuit breaker is required. It is commonly used in switchboards, panelboards, motor control applications, distribution equipment, and other power systems utilizing compatible SLD600A frame breakers. Its adjustable trip functions make it a practical choice for applications requiring coordination with existing protective devices while maintaining proper overcurrent protection within legacy electrical installations.