ABB TNIA400 - 400A, Circuit Breaker

The ABB TNIA400 - 400A, Circuit Breaker is a rugged, high-capacity overcurrent protector designed for the most demanding electrical environments. With a 400A rating, this breaker seamlessly guards large feeders and critical circuits across panelboards, switchboards, control panels, and OEM equipment, delivering reliable protection where it matters most.

Key reasons to choose the ABB TNIA400 include:

• High-current protection built for industrial and commercial installations, enabling robust protection for feeders and essential loads in distribution panels and motor control centers.
• dependable overcurrent protection that helps minimize downtime and equipment damage by responding quickly to overloads and short circuits.
• Versatile integration suitable for panelboards, switchboards, control panels, and OEM equipment, making it a practical choice for new builds or system upgrades.
• Durable construction for harsh environments designed to withstand the rigors of industrial operation while maintaining stable performance over time.

Ideal use cases include:

• Main or feeder protection in distribution panels where large current handling is required.
• Protection within motor control centers to safeguard motors and upstream equipment from overloads.
• OEM equipment assemblies that require a reliable, ready-to-install overcurrent device with proven performance.
• Commercial environments with demanding current requirements that demand consistent, safe operation.

Practical considerations for deployment:

• Ensure compatibility with your panelboard or switchboard architecture and confirm correct mounting and sizing for your bus arrangement.
• Incorporate the TNIA400 into your protective coordination plan to balance fast response with selectivity, helping prevent unnecessary outages.
• Use as a robust, drop-in solution where large-current protection is required in distribution panels and motor control centers.

Whether upgrading an aging protection scheme or equipping new equipment, the ABB TNIA400 delivers clear, dependable protection for industrial and commercial power systems. It’s a purpose-built solution for applications where safety, reliability, and uptime are non-negotiable.