SJD69300NGT - 300Amp Circuit Breaker

SJD69300NGT - 300Amp Circuit Breaker

When your electrical system requires a 300 amp molded case circuit breaker that matches the original form, fit, and function, the SJD69300NGT is designed to meet the job. Built on a 400A SJD frame, this 3-pole thermal magnetic circuit breaker provides dependable protection against overloads and short circuits in commercial and industrial power distribution systems. Its adjustable trip unit gives qualified technicians the flexibility to fine-tune protection settings for the specific application, helping maintain proper coordination within the electrical system. With interrupting ratings of 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC, this breaker is well-suited for a wide range of compatible installations where maintaining existing equipment is the priority. Built to last and engineered for demanding environments, the SJD69300NGT offers a reliable solution for keeping electrical distribution systems operating as intended.

Key Features and Benefits

• 300 Amp Current Rating: 300 Amp current rating for commercial and industrial electrical distribution.
• Three-Pole Design: Three-pole design for three-phase power systems.
• Thermal Magnetic Trip Mechanism: The thermal magnetic trip mechanism helps protect against overloads and short circuits.
• 400A SJD Frame: Built on a 400A SJD frame for compatibility with matching equipment.
• 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
• Interrupting Ratings:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Form, Fit, and Functional Replacement: Designed as a form, fit, and functional replacement for compatible legacy systems.
• Built to Last: Built to last in demanding electrical applications.
• Lug Terminals: Lug terminals are not included.
  

Technical Specifications

• Part Number: SJD69300NGT
  
• Type: SJD6-A
  
• Frame Size: 400A
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Trip Unit: Thermal Magnetic
  
• Poles: 3
  
• Amperage: 300A
  
• Interrupting Rating:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Adjustable Functions: Continuous Current Setting, Long Time Delay, Instantaneous Setting, Short Time Pickup, Short Time Delay, Short Time I²t Pickup, Ground Fault Pickup, Ground Fault Delay
  
• Dimensions:
  • Height: 11.0 in.
  • Width: 7.5 in.
  • Depth: 4.0 in.
• Lug Terminals: Not Included
  

Material Compliance and Certifications

• Construction and Ratings: Molded case circuit breaker construction. Thermal magnetic trip technology. Rated for applications up to 600VAC.
• Interrupting Ratings:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Installation Requirements: Install and maintain in accordance with applicable electrical codes and manufacturer specifications.
  

Where It Works Best

• The SJD69300NGT is commonly used in commercial buildings, industrial facilities, manufacturing plants, and institutional electrical systems where a 300-amp, 3-pole molded-case circuit breaker is required. It works well in switchboards, panelboards, motor control equipment, and power distribution systems that depend on a compatible replacement breaker to maintain the original equipment configuration. The adjustable thermal-magnetic trip unit allows qualified personnel to tailor protection settings to the installation's needs, making this breaker a practical choice for maintaining existing electrical infrastructure.