NJJ232400 - 400Amp Circuit Breaker

NJJ232400 - 400 Amp Circuit Breaker

The NJJ232400 400 amp circuit breaker is built for applications where high current and dependable protection are required. This 2-pole molded case breaker is commonly used in commercial and industrial electrical systems that need steady, predictable performance under load. With a 22kA interrupting rating at 240VAC, it’s designed to safely clear fault conditions and help protect downstream equipment from damage.

This breaker uses a thermal magnetic trip mechanism, which responds accurately to overloads and short circuits without unnecessary nuisance tripping. The bolt-on mounting style provides a secure fit inside the panel, while the included load-side lugs make wiring straightforward for electricians and maintenance teams. Overall, the NJJ232400 is a practical choice for keeping existing electrical systems operating safely and efficiently.

Key Features and Benefits

• Thermal Magnetic Trip Protection: Helps guard against overloads and short circuits
• 400 Amp, 2-Pole Configuration: Designed for higher-capacity power distribution
• Bolt-On Mounting: Helps maintain solid electrical connections
• Load-Side Lug Terminals Included: Allows for easier installation
• 22kA Interrupting Rating at 240VAC: Provides dependable fault protection

Technical Specifications

• Amperage: 400A
• Number of Poles: 2
• Interrupting Rating: 22kA at 240VAC
• Frame Type: NJJ
• Temperature Rating: 40°C
• Approximate Dimensions:
  • Width: 8.25 inches
  • Length: 10.13 inches
  • Depth: 3.88 inches
• Weight: Approx. 23 lbs
• Mounting Type: Bolt-On
• Terminals: Load-side lugs

Material Compliance and Certifications

• Industry Standards: This circuit breaker is manufactured using materials that meet industry safety and performance standards.
• Electrical Code Compliance: It is designed to comply with applicable electrical codes, making it suitable for use in regulated commercial and industrial electrical systems.

Where It Works Best

• The NJJ232400 is typically used for replacement or maintenance in existing power distribution equipment. It’s a good fit for industrial facilities, commercial buildings, and other environments that require reliable protection for high-current circuits.