Square D 999350 50A 3P Circuit Breaker, Bolt-On | AmpState

Meet the Square D 999350 50A 3P Circuit Breaker, a bolt-on protector built to stand up to daily electrical work in panelboards, load centers, and electrical distribution systems. This 3-pole, 50-amp device delivers reliable overcurrent protection for three-phase circuits, helping you maintain safe and uninterrupted power in demanding environments.

Designed for replacement projects and stocking spares, the 999350 keeps your bill of materials aligned with the original part number. That means quicker procurement, fewer compatibility surprises, and streamlined maintenance for facilities that rely on Square D components.

Key features

• Bolt-On mounting: Robust, secure attachment that simplifies installation in crowded panels and tight electrical spaces.
• Three-pole, 50 A: Suitable for balanced protection across all three phases in 3P distribution systems.
• Authentic Square D part: Ensures compatibility with Square D panelboards and load centers, preserving system integrity.
• BOM-aligned part number: Facilitates accurate part matching and easy reordering for maintenance programs.

Practical use cases

• Replacement in service panels, main distribution panels, and electrical distribution configurations that require a 50 A, 3-pole device.
• Stocking spare breakers for maintenance schedules that depend on consistent part numbering and OEM compatibility.
• Retrofits or refurbishments where preserving original BOM data helps with documentation and future upgrades.

Why this 999350 from AmpState stands out

• Authentic Square D reliability designed to deliver consistent protection and predictable performance in everyday operations.
• Bolt-on design that reduces installation complexity in crowded panels while maintaining solid electrical contact.
• Clear compatibility pathway: if you’re unsure about fit, AmpState offers guidance to confirm compatibility with your specific panelboard or load center.

Specifications at a glance

• Brand: Square D
• Part number: 999350
• Product type: Circuit Breaker
• Amperage: 50 A
• Poles: 3
• Mounting: Bolt-On

Restore dependable protection to your electrical distribution system with the Square D 999350 50A 3P Circuit Breaker. Add it to your cart today and keep your BOM aligned for seamless procurement and maintenance. If you need help matching a part number or confirming compatibility, send us a message and we’ll assist you in confirming the fit.