Square D | LI36300 | Circuit Breaker | 300A | 3-Pole | 600V

Meet the Square D LI36300 Circuit Breaker—a rugged, direct-fit protection device designed for demanding three‑phase power systems. With a 300A rating, 3‑pole configuration, and a 600V maximum, it delivers reliable overcurrent protection where it counts, keeping equipment secure and downtime minimal.

This LI36300 is purpose-built for maintenance, retrofit, and replacement projects where exact specs matter. The part number itself is the most dependable reference for compatibility, ensuring you’re selecting a breaker that fits your panel and preserves your electrical architecture.

Key specifications

• Amperage: 300A
• Poles: 3‑Pole
• Voltage: 600V
• Part number: LI36300

Why this LI36300 stands out

The LI36300 isn’t just another breaker on the shelf—it’s a precise, direct-fit solution designed to integrate seamlessly with Square D panels and switchgear. By matching the exact part number, you avoid guesswork, reduce installation time, and maintain the intended electrical coordination of your protection scheme. This is especially valuable in facilities where three‑phase feeders and main distribution rely on consistent performance and rated protection at 600V.

Ideal for industrial and commercial environments that rely on robust three‑phase power, this breaker supports quick turnarounds during maintenance or upgrades. It’s a dependable choice when you need a replacement that mirrors the original equipment’s specifications, ensuring predictable behavior under fault conditions and dependable operation across your system.

Use cases and practical applications

• Retrofit projects upgrading legacy panels to current Square D specifications
• Maintenance spares for critical three‑phase feeders and distribution circuits
• Replacement in service panels or motor control centers that require a 300A, 3‑pole, 600V protection device
• New installations that demand a proven, compatible 3‑pole, 600V breaker from a trusted brand

Ordering note: Before you order, confirm fit and ratings for your exact panel or enclosure. The LI36300 part number is the best reference for compatibility, helping you avoid mismatches and installation delays.