SHJD69300NT - 300Amp Circuit Breaker

SHJD69300NT - 300Amp Circuit Breaker

When your electrical system calls for a 300 amp, 3-pole molded case circuit breaker, the SHJD69300NT delivers the form, fit, and function needed for compatible installations. Built on the SJD 400-amp frame, this thermal magnetic circuit breaker is designed to help protect electrical equipment from overloads and short circuits while providing the flexibility of an adjustable SHJD6-A trip unit. Whether you're maintaining an existing commercial facility, servicing industrial equipment, or replacing a breaker in a power distribution system, this model offers the electrical ratings and adjustable protection settings needed to match many established applications.

One of the standout features of the SHJD69300NT is its range of adjustable trip functions. Qualified technicians can fine-tune the continuous current setting, long-time delay, instantaneous setting, short-time pickup, short-time delay, and short-time I²t pickup to coordinate protection with the rest of the electrical system. With interrupting ratings of 35kA at 600VAC, 65kA at 480VAC, and 100kA at 240VAC, this breaker is designed for demanding power distribution environments and is built to provide dependable service over the long term. Please note that lug terminals are not included and must be supplied separately if required for your installation.

Key Features and Benefits

• 300 Amp Continuous Current Rating: 300 Amp continuous current rating.
• Three-Pole Design: Three-pole design for three-phase electrical systems.
• Thermal Magnetic Trip Mechanism: Thermal magnetic trip mechanism helps protect against overloads and short circuits.
• SJD 400A Frame: SJD 400A frame with SHJD6-A adjustable trip unit.
• Adjustable Protection Functions Include:
  • Continuous Current Setting
  • Long-Time Delay
  • Instantaneous Setting
  • Short-Time Pickup
  • Short-Time Delay
  • Short-Time I²t Pickup
• Interrupting Ratings:
  • 35kA @ 600VAC
  • 65kA @ 480VAC
  • 100kA @ 240VAC
• Replacement Compatibility: Designed as a form, fit, and functional replacement for compatible equipment.
• Built to Last: Built to last for long-term use in commercial and industrial applications.
• Lug Terminals: Lug terminals are not included.
  

Technical Specifications

• Part Number: SHJD69300NT
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Type: SHJD6-A
  
• Frame Size: SJD 400A Frame
  
• Trip Unit: Thermal Magnetic
  
• Poles: 3
  
• Amperage: 300A
  
• Interrupting Rating: 35kA @ 600VAC; 65kA @ 480VAC; 100kA @ 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

• Product Family Specifications: The SHJD69300NT is manufactured for use in compatible electrical distribution equipment and is designed to meet the original electrical and mechanical specifications of its product family.
• Installation Requirements: Installation and maintenance should always be performed by qualified electrical personnel in accordance with applicable electrical codes, manufacturer recommendations, and local regulations.
  

Where It Works Best

• The SHJD69300NT is commonly used in commercial buildings, industrial facilities, manufacturing plants, distribution equipment, switchboards, panelboards, and feeder circuits where a 300A, 3-pole thermal magnetic molded case circuit breaker is required. Its adjustable trip settings make it a practical choice for applications where protective device coordination is important, helping maintenance teams replace compatible breakers while maintaining the original system design and electrical ratings.