Siemens | JXD63M300 | Circuit Breaker | 300A | 3-Pole

For professionals maintaining or upgrading electrical systems, the Siemens JXD63M300 Circuit Breaker delivers dependable protection with a precise fit for maintenance, retrofit, and replacement projects. Built to handle demanding three‑phase applications, this unit is defined by its exact amperage and three-pole configuration, ensuring your panel remains protected and compliant.

Key specifications at a glance

• Amperage: 300A
• Poles: 3-Pole
• Part reference: JXD63M300

Why this Siemens 3-Pole 300A breaker stands out

The JXD63M300 is more than a drop‑in replacement. It’s a precise match for systems requiring exact ratings and a 3‑pole configuration to support three‑phase circuits. The dedicated part number serves as the most reliable compatibility reference, reducing uncertainty during replacement or retrofits and helping you avoid mismatched components that can disrupt operation.

Ideal use cases

• Maintenance: swap worn or failing breakers to restore reliable protection quickly.
• Retrofit: upgrade or reconfigure panels that demand a 300A, 3‑pole solution.
• Replacement: maintain continuity in industrial or commercial electrical infrastructures by using the exact Siemens specification.

How this fits into your project

Use the JXD63M300 when your system calls for a three‑phase, 300‑amp circuit protector. Because the part number is the best reference for compatibility, always verify that the fit matches your panel model and rating requirements before ordering.

Practical notes for procurement

Important: Confirm fit and ratings before ordering. The part number JXD63M300 is your most reliable reference to ensure compatibility with your equipment and to maintain the integrity of your electrical protection strategy.