Siemens 3VA5340-7EF31-0AA0 400A 3P 480V Circuit Breaker | AmpState

The Siemens 3VA5340-7EF31-0AA0 is built for serious electrical protection in demanding environments. With a 400 A rating, three poles, and a 480 V operating range, this circuit breaker is designed to guard panelboards, load centers, and broader electrical distribution systems against overcurrent events. It’s the smart pick for teams that value precise part matching and dependable performance in real-world installations.

• Exact part-number fit — a direct match to 3VA5340-7EF31-0AA0 ensures seamless replacement in existing Siemens panels without guesswork.
• High-capacity protection — 400 A rating provides robust containment for substantial three-phase loads common in industrial and commercial setups.
• Three-pole, 480 V operation — ideal for standard three-phase distribution, helping maintain steady power delivery across critical equipment.
• Trusted source for maintenance and planning — a reliable spare in inventories for panel builders and maintenance teams, reducing downtime when replacements are needed.
• Ace up your compatibility game — AmpState carries this specific part and offers assistance to confirm fit and compatibility with your system.

This unit shines in scenarios where exact-fit reliability matters: upgrading existing Siemens installations, stocking spare parts for panel builds, or planning preventive maintenance for industrial power distribution. It’s well-suited for panelboards and load centers that require strong, predictable protection for 3-phase circuits at 480 V.

Key details at a glance

• Part Number: 3VA5340-7EF31-0AA0
• Type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 480 V

Available from AmpState, this part is an excellent addition to any spare-inventory strategy or direct-install plan. If you’re verifying compatibility or confirming a direct fit, send us a message and we’ll help you confirm the match for your specific panel or distribution setup.