Siemens 3VA5145-5EC31-0AA0 45A 3P 600V Circuit Breaker, Bolt-On | AmpState

Meet the Siemens 3VA5145-5EC31-0AA0—an exact OEM circuit breaker built for dependable protection in panelboards, load centers, and electrical distribution systems. With a 45 A, 3‑pole (3P) configuration and a 600V rating, this bolt-on breaker is purpose‑built for replacement projects and stocking spares that keep your bill of materials aligned to the original part number.

• Three-pole protection supports balanced three‑phase circuits up to 600V, delivering reliable interrupting capacity where it matters most.
• 45 A amperage provides precise overcurrent protection for multi‑branch distributions, helping protect equipment and wiring from faults.
• Bolt‑on mounting enables faster field installation and straightforward retrofits in compatible Siemens panelboards and distribution gear.
• Exact OEM part number 3VA5145-5EC31-0AA0 ensures BOM compatibility, reducing configuration errors during replacements or stocking.
• Ideal for replacements and spares Keep critical electrical infrastructure aligned with the original specifications and ensure quick turnaround during maintenance windows.
• Availability This item is available from AmpState, a trusted source for Siemens protection devices.

Why choose this specific Siemens breaker? It’s engineered to slot into existing Siemens protection schemes without the guesswork of aftermarket substitutes. Using the exact part number minimizes compatibility risks, preserves trip characteristics, and maintains the intended protection coordination across your panel hierarchy. This makes it especially valuable for facilities that require predictable performance, minimized downtime, and accurate BOM management.

Use cases and ideal environments

• Replacing a failed or aging 3P, 600V Siemens breaker in panelboards or distribution boards.
• Stocking a spare that matches the original protection scheme to shorten maintenance outages.
• Upgrading electrical distribution points where precise three‑phase protection is essential.
• Projects that mandate BOM fidelity and part‑number continuity for long‑term serviceability.

If you’re unsure about compatibility, you don’t have to guess. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Choose Siemens, choose reliability for your electrical distribution needs. Order the 3VA5145-5EC31-0AA0 through AmpState and keep your panelboard protection aligned with the original design intent.