NJL631300 - 300Amp Circuit Breaker

NJL631300 - 300Amp Circuit Breaker

The NJL631300 300 amp circuit breaker is designed for electrical systems that can’t afford guesswork. Built for service, replacement, and repair work, this 3-pole breaker helps protect three-phase power systems from overloads and short circuits that can shut down equipment or damage connected components. Its thermal magnetic trip system reacts when it should—fast during faults, steady during normal load conditions—so your electrical setup stays protected without nuisance trips. With solid construction, dependable ratings, and straightforward installation, the NJL631300 is a practical choice for demanding commercial and industrial applications.

Key Features and Benefits

• 300 Amp, 3-Pole Configuration: Supports three-phase electrical systems that require consistent, high-current protection.
• Thermal Magnetic Trip Unit: Designed to respond accurately to both long-term overloads and sudden short circuits, helping reduce unnecessary downtime.
• Molded Case Construction: Built to handle everyday electrical stress, heat, and operating conditions commonly found in industrial environments.
• Strong Interrupting Ratings: Rated to safely interrupt high fault currents across multiple voltage levels.
• Bolt-On Design with Load-Side Lugs: Makes mounting and wiring easier during maintenance or replacement work, saving time on the job.

Technical Specifications

• Number of Poles: 3
• Current Rating: 300 Amps
• Interrupting Capacity:
  • 42kA at 240 VAC
  • 30kA at 480 VAC
  • 22kA at 600 VAC
• Frame Type: NJL
• Dimensions:
  • Width: 8.25 inches
  • Length: 10.13 inches
  • Depth: 3.88 inches
• Maximum Operating Temperature: 40°C
• Approximate Weight: 23 lbs

Material Compliance and Certifications

• This circuit breaker is manufactured to meet established industry safety and performance standards. Materials are selected to align with applicable electrical and environmental regulations, supporting compliance with local and national electrical codes when installed according to specifications.

Where It Works Best

• The NJL631300 is a solid fit for industrial plants, commercial facilities, and power distribution systems that need dependable 300 amp, three-pole protection. It’s commonly used in switchgear and distribution equipment where reliability matters and downtime isn’t an option. A practical choice for electricians, maintenance crews, and facility managers responsible for keeping electrical systems running safely and smoothly.