SHJD69300NGT - 300Amp Circuit Breaker

SHJD69300NGT - 300Amp Circuit Breaker

If you're replacing a compatible 300 amp molded case circuit breaker, the SHJD69300NGT provides the form, fit, and function needed to keep your electrical distribution system operating as intended. Built on the SJD 400A frame, this 3-pole thermal magnetic circuit breaker is designed for commercial and industrial power systems where dependable circuit protection is essential. Its combination of thermal overload protection and magnetic short-circuit protection helps safeguard electrical equipment while maintaining the electrical ratings required for demanding applications.

One of the standout features of the SHJD69300NGT is its adjustable trip unit, which gives qualified personnel the ability to fine-tune protection settings to better match the needs of the connected system. Adjustable functions include continuous current setting, long time delay, instantaneous setting, short time pickup and delay, I²t pickup, and ground fault pickup and delay. This flexibility makes the breaker well suited for applications where coordination with other protective devices is important. Built to last and designed as a form, fit, and functional replacement for compatible installations, the SHJD69300NGT is an excellent solution for maintaining existing electrical systems.

Key Features and Benefits

• Part Number: SHJD69300NGT.
• 300 Amp Current Rating: 300 Amp current rating.
• 3-Pole Configuration: 3-pole configuration for three-phase electrical systems.
• Thermal Magnetic Trip Mechanism: Thermal magnetic trip mechanism for overload and short-circuit protection.
• SJD 400A Frame: SJD 400A frame.
• Type: SHJD6-A.
• Adjustable Trip Unit Includes:
  • Continuous Current Setting
  • Long Time Delay
  • Instantaneous Setting
  • Short Time Pickup
  • Short Time Delay
  • Short Time I²t Pickup
  • Ground Fault Pickup
  • Ground Fault Delay
• Built to Last: Built to last for long-term service in compatible electrical systems.
• Replacement Compatibility: Designed as a form, fit, and functional replacement.
• Lug Terminals: Lug terminals not included.
  

Technical Specifications

• Part Number: SHJD69300NGT
  
• Type: SHJD6-A
  
• Frame Size: SJD 400A Frame
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Trip Mechanism: 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.
• Lug Terminals: Not Included
  

Material Compliance and Certifications

• Interrupting Capacity: The SHJD69300NGT is rated for interrupting capacities of 35kA at 600VAC, 65kA at 480VAC, and 100kA at 240VAC.
• Installation Requirements: It is intended for installation in compatible electrical distribution equipment that matches its electrical ratings and physical configuration. Always verify compatibility before installation and follow all applicable electrical codes, manufacturer instructions, and local regulations.
  

Where It Works Best

• The SHJD69300NGT is commonly used in commercial buildings, manufacturing facilities, industrial plants, distribution equipment, switchboards, panelboards, and other three-phase power distribution systems requiring a 300 amp, 3-pole molded case circuit breaker. It is especially well suited for maintaining compatible legacy equipment where matching the original frame size, trip characteristics, and electrical ratings is essential for proper operation.