Siemens 3VA6340-6JQ31-0AA0 Circuit Breaker, 400A, 3-Pole, 600V

Meet the Siemens 3VA6340-6JQ31-0AA0 circuit breaker—the dependable, industrial-grade overcurrent protection device designed for demanding service, maintenance, and replacement projects. This unit is built to safeguard three-phase power systems with a robust 400 A rating, three poles, and a 600 V capacity, making it a trusted choice for reliable electrical protection in commercial and industrial environments.

Key features at a glance

• Manufacturer: Siemens
• Part Number: 3VA6340-6JQ31-0AA0
• Product Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V

Why this specific breaker matters for your project

• Precise compatibility: The exact part number ensures a clean fit into Siemens-compatible panels and switchgear, minimizing the risk of mismatches during replacements or upgrades. Always verify fit by part number and application requirements to ensure seamless operation.
• Three‑phase protection: A 3-pole design provides coordinated interruption for 3-phase systems, helping protect motors, feeders, and downstream equipment from overloads and short circuits.
• High-current readiness: With a 400 A rating, it’s suited for demanding industrial loads, ensuring dependable protection for heavy machinery, manufacturing lines, and critical power distribution points.
• 600 V capability: Designed to handle typical industrial distribution networks, delivering reliable performance in environments requiring robust voltage protection.

Ideal use cases

• Upgrading or replacing protection in existing industrial switchgear and panel boards
• Maintenance projects for manufacturing lines, conveyors, and processing equipment
• New installations where Siemens-compatible breakers are specified for reliability and standardization
• Service upgrades in facilities that require high-current, three-phase protection with well-defined part matching

What sets this Siemens breaker apart from alternatives

• Exact part-number fidelity reduces installation risk and accelerates procurement, so you can minimize downtime during maintenance or upgrades.
• Three-pole, 400 A design is tailored for medium- to high-load three-phase systems, offering strong protection without overcomplicating the panel layout.
• Built to align with Siemens ecosystem and documentation, supporting straightforward service, testing, and replacement workflows.

Pro tips for when you’re planning your install

• Have the exact part number handy when ordering to ensure a proper fit in your enclosure and to match the existing protection scheme.
• Prepare accompanying documentation that references the 3VA6340-6JQ31-0AA0 part number for fast approvals and audits.
• Use in environments within its 600 V rating and ensure the surrounding switchgear is compatible with three-phase protection and the current rating.
• If you’re unsure about compatibility, send us the part number and your application details and we’ll help confirm fit and recommended usage.

Notes

Verify fit by part number and application requirements. Need help matching a part number or confirming compatibility? Message us and we’ll help.