SJD69300 - 300Amp Circuit Breaker

SJD69300 - 300Amp Circuit Breaker

When you need a 300 amp molded case circuit breaker that matches the form, fit, and function of your existing electrical equipment, the SJD69300 is built for the job. This 3-pole thermal magnetic circuit breaker is designed for use in commercial and industrial power distribution systems where dependable overcurrent and short-circuit protection is essential. Built on a 400A frame with a Type SJD6-A configuration, it offers adjustable trip settings that allow electricians and maintenance professionals to tailor protection to the specific requirements of the connected equipment. The trip unit includes continuous current adjustment, long time delay, and instantaneous trip settings, making it easier to coordinate protection within an existing electrical system. Built to last and intended as a form, fit, and functional replacement, the SJD69300 helps keep compatible switchboards, panelboards, and distribution equipment operating as intended. Please note that lug terminals are not included and must be supplied separately if required.

Key Features and Benefits

• 300 Amp Continuous Current Rating: 300 Amp continuous current rating.
• Three-Pole Configuration: Three-pole configuration for three-phase electrical systems.
• Type SJD6-A Molded Case Circuit Breaker: Type SJD6-A molded case circuit breaker.
• 400A Frame Size: 400A frame size.
• Thermal Magnetic Trip Unit: Thermal magnetic trip unit for overload and short-circuit protection.
• Adjustable Trip Functions Include:
  • Continuous Current Setting
  • Long Time Delay
  • Instantaneous Setting
• Interrupting Capacity:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Built to Last: Built to last for long-term service in compatible electrical systems.
• Form, Fit, and Functional Replacement: Designed as a form, fit, and functional replacement for compatible installations.
• Lug Terminals: Lug terminals are not included.
  

Technical Specifications

• Part Number: SJD69300
  
• Type: SJD6-A
  
• Frame Size: 400A Frame
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Trip Unit: Thermal Magnetic
  
• Poles: 3
  
• Amperage: 300A
  
• Adjustable Functions: Continuous Current Setting, Long Time Delay, Instantaneous Setting
  
• Interrupting Rating:
  • 25kA @ 600VAC
  • 35kA @ 480VAC
  • 65kA @ 240VAC
• Dimensions:
  • Height: 11.0 in.
  • Width: 7.5 in.
  • Depth: 4.0 in.
• Lug Terminals: Not Included
  

Material Compliance and Certifications

• Electrical Distribution Equipment: The SJD69300 is manufactured for use in compatible electrical distribution equipment and is designed to meet the published electrical ratings for its class.
• Installation Requirements: Installation should be performed in accordance with the National Electrical Code (NEC), applicable local electrical codes, and the manufacturer's recommendations. As with any replacement circuit breaker, compatibility with the existing equipment should always be verified before installation.
  

Where It Works Best

• The SJD69300 is commonly found in commercial buildings, manufacturing facilities, industrial plants, schools, healthcare facilities, and other three-phase electrical distribution systems that require a 300A molded case circuit breaker. It's well suited for protecting feeders, panelboards, switchboards, motor distribution equipment, and other circuits where adjustable thermal magnetic protection is needed. Whether you're replacing a worn breaker during scheduled maintenance or restoring an existing electrical system, this breaker is designed to provide the proper fit and electrical ratings for compatible legacy equipment.