General Electric | TNIA400VG | Circuit Breaker | 400A | 3-Pole | 400V

Meet the General Electric TNIA400VG Circuit Breaker—an exact-fit, three-phase protection solution designed for demanding 400V environments. This 400A, 3-pole breaker is purpose-built for maintenance, retrofit, and replacement projects where precise specifications and reliable performance matter.

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 400V

Why the TNIA400VG stands out

• Exact reference for compatibility: Part number TNIA400VG is the best reference when confirming fit with GE panels and compatible distribution equipment.
• Three-pole protection: The 3-Pole design ensures synchronized protection across all three phases, which is essential for balanced operation in three-phase systems.
• Designed for 400V systems: Specifically rated for 400V applications, aligning with many industrial and commercial power distributions.
• Maintenance, retrofit, and replacement ready: Ideal when you’re upgrading or replacing existing protection without sacrificing reliability or compatibility.

Practical use cases

Use the TNIA400VG when servicing three-phase panels in manufacturing floors, large commercial spaces, or any setup that runs on 400V power. It’s a solid choice for:

• Retrofit projects where the goal is to preserve original system characteristics while upgrading protection
• Maintenance schedules that require dependable, field-proven GE components
• Replacement of aging breakers to restore balanced, reliable fault protection

Fit, verification, and installation tips

To ensure seamless compatibility, verify the following before ordering:

• The panel or distribution board label references TNIA400VG as the correct unit
• The system operates at 400V and requires a 3-pole protection scheme
• The requested amperage is 400A and suits your load profile

installation should follow standard electrical safety practices and local codes. Always power down the equipment, use appropriate PPE, and consult your panel’s documentation to confirm compatibility. If in doubt, rely on the part number as the primary guide for matching components.

With the General Electric TNIA400VG, you’re choosing a robust, purpose-built circuit breaker that aligns with professional-grade three-phase protection needs. It’s not just about shutting off power—it’s about predictable performance, easy retrofits, and dependable protection for your critical electrical infrastructure.