Siemens 5SY4218-7 15A 2P 400V Circuit Breaker | AmpState

The Siemens 5SY4218-7 15A 2P 400V Circuit Breaker is designed for dependable, everyday electrical protection in panelboards, load centers, and distributed electrical systems. With a direct part-number match that makes sourcing straightforward, this breaker is a smart choice for maintenance teams, panel builders, and spare inventory where reliability matters most.

Why this breaker stands out

• Two-pole design for balanced protection across both legs of a 400V distribution system
• 15 ampere rating provides precise protection for circuits that require reliable overcurrent interruption
• Direct part-number compatibility (5SY4218-7) simplifies procurement, reducing downtime during replacements
• Specifically suited for panelboards and load centers in electrical distribution networks
• Available from AmpState, making it easy to maintain a ready-to-install stock for ongoing projects

Key specifications

• Manufacturer: Siemens
• Part Number: 5SY4218-7
• Product Type: Circuit Breaker
• Amperage: 15 A
• Poles: 2
• Voltage: 400V

Ideal use cases

Engineered for electrical distribution networks, this 2P 15A breaker is a reliable choice for:

• Panelboard and load center replacements where a direct part-number match is required
• Maintenance stock for service vans and job sites, ensuring quick, compatible swaps
• New installations in 400V AC distribution systems where compact, dependable protection is needed

Compatibility and installation tips

Before installation, verify that your panelboard or distribution equipment supports 400V, and confirm that a 2-pole configuration aligns with the protected circuit. If you’re replacing an existing 5SY4218-7, this unit offers a straightforward, drop-in replacement to minimize downtime. Handle all electrical work with standard safety precautions and follow manufacturer guidelines for torque and termination.

Why choose AmpState

AmpState stocks this Siemens 5SY4218-7 to help professionals keep critical inventory on hand. With exact part-number compatibility and ready-to-ship availability, you can confidently source a trusted component for routine maintenance or urgent repairs without guesswork.