Square D LHL363001021 300A 3P 600V Circuit Breaker | AmpState

The Square D LHL363001021 300A 3P 600V Circuit Breaker is built for reliable overcurrent protection in panelboards, load centers, and broad electrical distribution networks. This 3-pole unit with a 600V rating is designed to safeguard three-phase systems where high-capacity protection is essential, making it a trusted choice for industrial and commercial applications.

Why this breaker stands out

• Direct part-number match: A precise fit for installations requiring LHL363001021, simplifying replacements and stocking decisions for maintenance teams and panel builders.
• High-capacity protection: 300 A rating provides robust safeguarding for heavy-load feeders and distribution circuits in demanding environments.
• Three-pole design: Ideal for balanced three-phase systems, ensuring coordinated protection across all phases and preventing phase-to-phase faults.
• Wide voltage capability: 600V maximum rating supports a variety of industrial and commercial distribution schemes, enhancing compatibility with common power systems.
• Durable, industry-standard build: Square D reliability trusted in electrical panels and distribution setups, backed by AmpState’s verified availability.

Who this is for

• Maintenance teams needing a ready-to-ship, exact-part replacement to minimize downtime
• Panel builders stocking spare inventory for quick field installs
• Electrical distributors and contractors specifying three-phase protection in medium-to-large panels

Practical uses and scenarios

Use the LHL363001021 to protect large feeders feeding motors, contactors, and distributed loads in manufacturing, processing, or commercial facilities. It’s well-suited for retrofit projects where an exact part-number match ensures compatibility with existing bus and mounting configurations, reducing installation guesswork and rework.

How it helps you make a smarter choice

• Clear compatibility: Knowing the exact part number eliminates ambiguity during ordering and reduces the risk of mismatched breakers in critical panels.
• Inventory efficiency: Keeping a genuine, in-stock Square D unit supports faster service calls and maintenance cycles.
• Operational resilience: With reliable overcurrent protection, you can minimize unplanned outages and keep distribution systems running smoothly.

Installation and compatibility notes

Ensure an exact match with the part number LHL363001021 when replacing or stocking this breaker. Confirm that the breaker is appropriate for your panelboard, load center, or distribution panel’s bus type and mounting scheme. If you’re unsure about fit or compatibility, AmpState offers support to verify the match and provide guidance on suitable installations.

Order confidence comes from choosing a genuine Square D component designed for durable service in demanding environments. For projects requiring precise part-number accuracy or quick replenishment, this 300A 3P 600V circuit breaker from AmpState is a dependable, straight-forward choice.