Square D LH26300AC 300A 2P 600V Circuit Breaker | AmpState

The Square D LH26300AC 300A 2P 600V Circuit Breaker is engineered to deliver reliable overcurrent protection for panelboards, load centers, and electrical distribution setups. With a robust 300-amp rating and a two-pole configuration, this breaker handles high-load circuits while keeping installation straightforward in demanding environments.

Built for everyday electrical work, it’s a dependable choice when a consistent part number is essential for retrofit tasks, maintenance planning, and long-term asset management. The LH26300AC designation helps keep your inventory and service history clean, reducing downtime when parts need to be swapped or upgraded.

• Amperage and poles: 300 A, 2 poles
• Voltage rating: 600 V maximum operating voltage
• Applications: panelboards, load centers, and electrical distribution networks
• Part-number stability: ideal for retrofit and maintenance projects that require keeping the same part number
• Availability: stocked by AmpState and ready to ship
• Compatibility help: need to verify fit? Message us and we’ll confirm compatibility with your panel

Practical use cases

• Retrofit aging panels in commercial or light industrial facilities where a 300 A, 2P, 600 V breaker is specified
• Maintenance planning for systems that rely on a stable, consistent LH26300AC component across service intervals
• Replacement in load centers and distribution panels where reliable protection for high-load circuits is required

Why this matters

Square D is trusted for durable protection in demanding electrical environments. The LH26300AC’s two-pole design ensures simultaneous interruption of both hot conductors, delivering dependable protection for critical equipment and reducing fault exposure. Its 600 V rating broadens applicability across commercial and industrial installations, making it a practical choice for ongoing serviceability and future upgrades.

Technical specifications

• Amperage: 300 A
• Poles: 2
• Voltage: 600 V
• Part number: LH26300AC
• Type: Circuit Breaker
• Manufacturer: Square D

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit for your panel—AmpState has you covered with ready-to-ship stock and expert support.