Siemens 3VA5103-1MU31-0AA0 3A 3P Circuit Breaker | AmpState

The Siemens 3VA5103-1MU31-0AA0 is a genuine three-pole circuit breaker rated at 3 A, built to protect panelboards, load centers, and electrical distribution networks. Designed for replacement projects and spare stock, this exact part number ensures your BOM stays aligned with the original Siemens specification, reducing compatibility risk during upgrades or service outages.

Key specifications

• Manufacturer: Siemens
• Part number: 3VA5103-1MU31-0AA0
• Product type: Circuit breaker
• Amperage (rating): 3 A
• Poles: 3
• Applications: Panelboards, load centers, and electrical distribution

Why this exact part matters

• BOM integrity: Using the original Siemens part number helps ensure your assemblies remain traceable to the manufacturer’s specifications, which matters for safety certifications, warranties, and future maintenance.
• Three-phase protection: A 3P configuration is ideal for balancing three-phase service runs, minimizing disruption and ensuring consistent protection across all legs of the circuit.
• Genuine Siemens reliability: By selecting a part from the original line, you reduce the risk of compatibility issues that can arise with aftermarket substitutes.
• Stocking convenience: Ideal for service teams maintaining spares inventories, enabling faster replacements and downtime reduction.
• Support for compatibility: AmpState offers this part and can assist in confirming fit with your panelboard or distribution equipment.

Ideal use cases

• Replacing a failed 3A, 3-pole breaker in Siemens-panel installations to restore protected circuits quickly.
• Stocking spare parts for multi-panel facilities to ensure BOM alignment across maintenance cycles.
• Upgrading or refurbishing electrical distribution where original part numbers are required for compliance and documentation.

How it compares and practical tips

Choosing the exact Siemens 3VA5103-1MU31-0AA0 over generic equivalents helps avoid mismatches in trip characteristics, frame size, and mounting compatibility that can occur with substitutes. When integrating into an existing system, verify that the panelboard or load center is specified for a 3VA5103-1MU31-0AA0 variant and that the mounting and terminal configuration remain consistent with the original installation. If you’re unsure about compatibility, AmpState can assist in confirming fit to keep your project on track.

Available from AmpState, this part is a reliable choice for professionals who prioritize precise part matching, swift procurement, and long-term distribution protection for three-phase electrical systems.