SJD69300NT - 300Amp Circuit Breaker

SJD69300NT - 300Amp Circuit Breaker

When you need a 300 Amp molded case circuit breaker that matches the form, fit, and function of your existing equipment, the SJD69300NT delivers the protection and adjustability required for many commercial and industrial power distribution systems. Built on a 400 Amp SJD frame, this 3-pole thermal magnetic circuit breaker is designed to help safeguard electrical equipment against overloads and short circuits while providing multiple adjustable trip settings for better coordination with your system. Whether you're maintaining an existing switchboard, replacing a failed breaker, or servicing a facility's electrical distribution equipment, the SJD69300NT offers the electrical ratings and compatibility needed for many legacy installations.

One of the standout features of this breaker is its adjustable thermal-magnetic trip unit, allowing qualified personnel to fine-tune settings to meet system requirements. Adjustable functions include Continuous Current Setting, Long Time Delay, Instantaneous Setting, Short Time Pickup, Short Time Delay, and Short Time I²t Pickup, making it easier to coordinate protection across connected equipment. Built to last, this breaker is intended as a form, fit, and functional replacement for compatible systems.

Key Features and Benefits

• 300 Amp Continuous Current Rating: 300 Amp continuous current rating.
• 3-Pole Design: 3-pole design for three-phase electrical systems.
• Thermal Magnetic Trip Unit: Thermal magnetic trip unit for overload and short-circuit protection.
• 400 Amp SJD Frame: 400 Amp SJD frame.
• Adjustable Trip Functions:
  • Continuous Current Setting
  • Long Time Delay
  • Instantaneous Setting
  • Short Time Pickup
  • Short Time Delay
  • Short Time I²t Pickup
• Form, Fit, and Functional Replacement: Designed as a form, fit, and functional replacement for compatible equipment.
• Built to Last: Built to last for demanding commercial and industrial environments.
• Lug Terminals: Lug terminals are not included.
  

Technical Specifications

• Part Number: SJD69300NT
  
• Type: SJD6-A
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Frame Size: 400 Amp Frame
  
• Trip Unit: Thermal Magnetic
  
• Amperage: 300 Amps
  
• Poles: 3
  
• Interrupting Rating:
  • 25kA @ 600 VAC
  • 35kA @ 480 VAC
  • 65kA @ 240 VAC
• Dimensions:
  • Height: 11.0 in.
  • Width: 7.5 in.
  • Depth: 4.0 in.
• Lug Terminals: Not Included
  

Material Compliance and Certifications

• Commercial and Industrial Applications: The SJD69300NT is manufactured for use in commercial and industrial electrical distribution systems and is designed to meet the electrical ratings specified by the original manufacturer for compatible applications.
• Installation Requirements: Before installation, verify that the breaker's ratings and configuration match your equipment and system requirements. Installation and adjustment should always be performed by qualified electrical personnel in accordance with applicable electrical codes and manufacturer guidelines.
  

Where It Works Best

• The SJD69300NT 300 Amp molded case circuit breaker is commonly used anywhere dependable overcurrent protection is needed in existing electrical distribution systems, including:
  • Commercial office buildings
  • Manufacturing facilities
  • Industrial plants
  • Distribution panels
  • Switchboards
  • Motor control applications
  • Mechanical equipment
  • Power distribution systems
  • Maintenance and repair projects requiring a compatible replacement breaker