Square D M800S 800A 3P Circuit Breaker, NEMA 1 | AmpState

Introducing the Square D M800S 800A 3P Circuit Breaker — a purpose-built protective device for panelboards, load centers, and electrical distribution systems. With three poles and an 800-amp rating, this NEMA 1 unit is designed for indoor dry environments where reliable feeder protection is essential. The M800S integrates seamlessly with established Square D installations, preserving your protection scheme during retrofit or maintenance projects.

Why choose the M800S for retrofit or ongoing maintenance? Its part-number fidelity means you can source, stock, and replace the exact same component without re-engineering your panels. This simplifies planning, reduces downtime, and ensures compatibility with existing protections across your distribution network.

• Part Number: M800S
• Manufacturer: Square D
• Amperage: 800 A
• Poles: 3
• Type: Circuit Breaker
• Enclosure: NEMA 1
• Applications: Panelboards, Load Centers, Electrical Distribution

These characteristics make the M800S ideal for replacing aging or failed breakers in commercial or light industrial settings, provisioning high-capacity protection for large feeders, and streamlining maintenance planning with a widely supported, consistent part number. AmpState stocks this model to support projects that require reliable sourcing and quick fulfillment.

Need help matching a part number or confirming compatibility? AmpState specialists can verify fit for your panel or distribution layout and confirm that the M800S matches your specifications. Reach out for fast guidance and confirmation before you place your order.