Siemens 5SY63507 50A 3P 400V Circuit Breaker | AmpState

Meet the Siemens 5SY63507—a purpose-built three-pole circuit breaker engineered for dependable protection in modern electrical systems. With a 50 A rating and a 400 V operating window, this unit is designed for three-phase panelboards, load centers, and distribution assemblies where precise, reliable interrupting capability matters most. It’s a purposeful drop-in solution that helps you keep your BOM aligned with the original part number, ensuring seamless replacements and consistent performance across your installation.

Why this Siemens circuit breaker stands out

• Exact OEM compatibility — The 5SY63507 part number is ideal for replacements and spare stocking, helping you preserve BOM integrity and reduce installation guesswork.
• Three-pole, 50 A — Perfect for three-phase circuits that require solid common-trip protection and cohesive coordination with your distribution equipment.
• 400 V rating — Suited for standard 400 V three-phase environments, delivering reliable performance in commercial and industrial electrical systems.
• Reliable protection, straightforward replacement — Built to safeguard panelboards and load centers from overloads and short circuits, while simplifying service upgrades and maintenance.
• AmpState supply and support — Available from AmpState with responsive assistance to verify fit and compatibility for your specific installation.

Who should consider this part

• Electrical contractors performing panel modernization or service upgrades that require authentic Siemens components.
• Facility managers and maintenance teams stocking spares to minimize downtime during electrical repairs.
• OEMs and integrators aligning their assemblies with original equipment manufacturer (OEM) specifications.

Use cases and practical applications

• Replacement projects where compatibility with existing Siemens equipment is critical to avoid rewiring or busbar changes.
• Spare parts strategies that prioritize BOM fidelity, ensuring quick swaps without voiding warranties or causing compatibility issues.
• New installations in three-phase distribution systems that require robust, standard-rated protection at 400 V.

Specifications at a glance

• Manufacturer: Siemens
• Part number: 5SY63507
• Product type: Circuit Breaker
• Amperage: 50 A
• Poles: 3
• Voltage: 400 V

Ready to verify fit or need a quick compatibility check? AmpState is available to assist with part-number matching and confirmation of compatibility, helping you move from order to installation with confidence.