NJJ232300 - 300Amp Circuit Breaker

NJJ232300 - 300Amp Circuit Breaker

When you're replacing a breaker in existing equipment, the details have to line up. The NJJ232300 is a 300A, 2-pole molded-case circuit breaker with a bolt-on mounting configuration and a thermal-magnetic trip. It carries an interrupting rating of 22 kA.I.C. at 240VAC and a 40°C temperature rating. Physical size is another key factor: this NJJ breaker measures 10.13 inches high, 8.25 inches wide, and 3.88 inches deep. Load-side lug terminals are included. If you're maintaining equipment that already uses an NJJ-style breaker, the NJJ232300 gives you a specific combination of amperage, poles, mounting style, dimensions, and electrical ratings to compare with the breaker currently in place. It's built to last and intended for applications that require these specific form, fit, and functional characteristics.

Key Features and Benefits

• 300A rating for applications requiring this specific amperage.
• 2-pole design for compatible two-pole electrical systems.
• 22k A.I.C. at 240VAC provides the breaker's stated interrupting capacity.
• Thermal-magnetic trip responds to overload and short-circuit conditions.
• Bolt-on configuration fits equipment designed around this mounting arrangement.
• Includes load-side lug terminals for the required load-side connection.
• 40°C rating for applications where this temperature rating is specified.
• Known dimensions help when checking physical fit in existing equipment.

Technical Specifications

• Part Number: NJJ232300
  
• Type: NJJ
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 300A
  
• Poles: 2
  
• A.I.C. Rating & Voltage: 22k @ 240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting: Bolt-On
  
• Temperature Rating: 40°C
  
• Height: 10.13 in.
  
• Width: 8.25 in.
  
• Depth: 3.88 in.
• Ship Weight: 23.00 lbs.
• Terminals: Load-Side Lug Terminals Included
  

Material Compliance and Certifications

• No specific material compliance information or certification listings are included in the available specifications for the NJJ232300. If your job requires a particular certification, listing, or material standard, check the breaker markings and applicable technical documentation before installation. Confirm this detail rather than assume it, especially for equipment subject to facility requirements or local electrical codes.

Where It Works Best

• The NJJ232300 is a practical fit for existing electrical equipment designed around the NJJ breaker type and requiring a 300A, 2-pole, bolt-on thermal-magnetic breaker with a 22k A I.C. rating at 240VAC.
• It can be especially useful in maintenance and replacement work where changing the surrounding equipment isn't the objective—you need the correct breaker characteristics for the existing application. That means checking more than amperage. Compare the part number, number of poles, interrupting and voltage ratings, mounting style, terminal configuration, dimensions, and other equipment requirements before matching.
• For an NJJ232300 replacement, form, fit, and function come first. Always verify compatibility with the existing equipment, and have qualified electrical personnel perform the installation in accordance with applicable electrical codes and equipment requirements.