Jj JJ3-B400 - 400A, Circuit Breaker

Jj JJ3-B400 - 400A Circuit Breaker delivers rugged, dependable overcurrent protection for demanding electrical systems. With a 400A current rating, it’s ready to safeguard large-powered circuits and prevent damage from overloads and faults.

Designed for use in panelboards, switchboards, control panels, and OEM equipment, the JJ3-B400 is a versatile solution built for environments where reliability matters most. Whether you’re assembling a new distribution panel or upgrading an existing one, this breaker provides the safety you need in busy facilities.

• Current rating: 400A
• Applications: panelboards, switchboards, control panels, and OEM equipment
• Ideal for: industrial, commercial, and OEM settings where dependable overcurrent protection and safe operation are critical
• Protection scope: optimizes safety in distribution panels and motor control centers

Why choose the Jj JJ3-B400? It’s engineered to deliver consistent protection for high-demand circuits, helping prevent wiring damage and equipment downtime. In busy distribution environments and motor control centers, this 400A breaker acts as a first line of defense, providing clear interruption during fault events and contributing to safer, more reliable operation of your electrical infrastructure.

Practical use scenarios include:

• Upgrading protection in industrial panelboards to handle larger loads
• Integrating robust overcurrent protection in commercial distribution schemes
• Incorporating into OEM equipment builds where strong, reliable circuit interruption is essential
• Adding protection to motor control centers to safeguard motors and control circuitry

Tips for optimal performance: pair the JJ3-B400 with regular visual inspections and routine protective-device testing as part of your maintenance program. Ensure compatibility with your existing panel footprint and follow manufacturer installation guidelines to maintain reliable protection over the long term.