Siemens | HJXD63M300 | Circuit Breaker | 3-Pole

Siemens HJXD63M300 is a 3-pole circuit breaker built for dependable protection in maintenance, retrofit, and replacement projects where exact specifications matter. This model is identified by the part number HJXD63M300, making compatibility straightforward and reducing the guesswork in sourcing spare parts.

• Three-pole configuration supports coordinated interruption across all three phases in 3‑phase systems, helping maintain balanced protection and reducing the risk of partial outages.
• Exact part-number compatibility ensures the electrical characteristics, footprint, and fit align with your existing Siemens panel or breaker kit.
• Ideal for maintenance, retrofit, and replacement when you need a like-for-like substitute that matches the original specifications.
• Trusted Siemens build with the reliability you expect from the Siemens family of electrical protective devices.

Important considerations before ordering: Always confirm the breaker’s fit and ratings for your specific panel and system. The part number is the best reference for compatibility, and using HJXD63M300 helps ensure safe, code-compliant operation.

Typical use scenarios:

• Maintenance in existing Siemens panels that require a direct replacement
• Retrofit projects upgrading to a matching Siemens 3-pole breaker
• Spare parts strategy to minimize downtime during servicing

Practical tips for a smooth installation:

• Have your panel model and bus configuration on hand to verify compatibility with HJXD63M300.
• Double-check the system’s current and trip characteristics match your project requirements.
• Store replacement breakers in anti-static packaging and follow proper safety procedures during installation.