Square D | MHL26300 | Circuit Breaker | 300A | 2-Pole | 600V

Meet the Square D MHL26300 circuit breaker—a 300A, 2-pole, 600V molded‑case breaker designed to keep demanding electrical systems safe and reliable. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this unit delivers dependable protection when you need it most.

Key specifications

• Amperage: 300A
• Poles: 2-Pole
• Voltage rating: 600V

Why this breaker stands out

Compatibility is the core value of the MHL26300. The part number itself is the quickest, most reliable reference for ensuring a precise fit in existing Square D panels and systems. Designed for straightforward replacements, it minimizes panel downtime and simplifies wiring continuity during upgrades or service work.

Ideal use cases

• Maintenance projects where the exact Square D specifications are required to restore original protection levels.
• Retrofit installations in aging panels that still rely on MHL-series components.
• Replacement of worn or failing breakers in compatible Square D electrical distributions, ensuring continuity and safety.

How it solves common problems

For facilities with high-amp circuits, the MHL26300 provides robust, reliable protection at 300 amperes across both conductors in a 600V system. By matching the precise part number, you reduce the risk of compatibility issues, eliminating guesswork in critical service upgrades and keeping your electrical distribution performing as designed.

Practical guidance for procurement

Before ordering, confirm fit and ratings using the part number MHL26300 as the primary reference. Always cross-check panel labeling, confirm the amperage and voltage align with your system requirements, and ensure the replacement matches the original configuration to maintain protective coordination across the circuit.