Siemens 3VA9373-0JJ24 400A 3P Circuit Breaker | AmpState

Meet the Siemens 3VA9373-0JJ24, a robust 400 A, 3-pole circuit breaker engineered for dependable circuit protection across panelboards, load centers, and electrical distribution networks. Built for everyday electrical work, it delivers consistent performance in both new installations and retrofit projects where maintaining the exact part number is essential.

• High-current reliability: 400 A rating with a 3-pole configuration provides strong main or feeder protection for demanding commercial and industrial environments.
• Direct compatibility for panel protection: Designed to work within Siemens panelboards and distribution systems, helping you preserve system architecture and protection schemes.
• Retrofit-friendly with consistent part numbering: Ideal for maintenance planning when the part number must stay the same, reducing downtime and misfits during replacements.
• Practical for planning and service: A dependable choice for retrofit work, service upgrades, and ongoing distribution protection where a stable, widely-supported model is required.
• AmpState availability: Ready-to-ship from AmpState, ensuring you can source the exact part you need when time matters.

Who benefits most from the 3VA9373-0JJ24? Engineers and facilities teams tackling panelboard upgrades, service maintenance, or distribution-system refreshes who need a trusted Siemens model with predictable compatibility. It’s especially advantageous when reference part numbers must match for inventory control or service contracts, helping you avoid mismatches and delays.

Use cases in the real world include replacing a worn-out breaker in a Siemens-equipped panel, upgrading a feeder in a commercial building, or stocking a reliable, consistent component for ongoing maintenance programs. If you’re coordinating retrofits or routine service while keeping a consistent part number, this 3VA9373-0JJ24 is designed to fit your workflow.

If you’re unsure about exact fit, we’re here to help. Message us to confirm compatibility or match a part number, and we’ll verify the fit for your specific enclosure and distribution setup.