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Matched our existing hardware and fit as expected. Clean install.
Maintenance · Retrofit work
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Circuit Breaker
Siemens | HHJD63B300L | Circuit Breaker | 300A | 3-Pole
| Amperes | 300 |
| Poles | 3 |
| Product Type | Circuit Breaker |
Regular price
$10,051.00
Sale price
$10,051.00
Regular price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Siemens | HHJD63B300L | Circuit Breaker | 300A | 3-Pole
Regular price
$10,051.00
Sale price
$10,051.00
Regular price
Unit price
Product description
Shipping
The Siemens HHJD63B300L circuit breaker is a purpose-built 300A, 3-pole unit designed for reliable performance in demanding electrical systems. This breaker is ideal for maintenance, retrofit, and replacement projects where exact specifications matter, delivering consistent protection for three‑phase circuits.
Key specifications
- Amperage: 300 A
- Poles: 3-Pole (three‑phase)
Why choose the Siemens HHJD63B300L
What sets this model apart is its strict adherence to Siemens’ design standards, ensuring compatibility when matching components is critical. The HHJD63B300L is the definitive reference for identifying a correct fit in compatible panels, making it the smart choice for replacement or upgrade projects where you can't compromise on ratings or configuration.
With a focus on practical, real-world use, this breaker supports seamless maintenance and rapid retrofits in three‑phase electrical setups. Its solid, purpose-built construction is designed to withstand the rigors of industrial and commercial environments, helping you keep critical power distribution running smoothly.
Ideal use cases
- Replacing an old or failed breaker in Siemens panels that require a 300A, 3-pole unit
- Retrofit projects that upgrade to higher current capacity while preserving existing three‑phase layouts
- Maintenance cycles in commercial facilities and light industrial installations where precise matching is essential
Compatibility and how to verify fit
For the most reliable compatibility, reference the part number HHJD63B300L. Before ordering, confirm that your panel and service requirements align with 300A and 3‑pole configuration, and verify ratings against your installation’s specifications. The part number is the best reference to avoid misfits in critical powerDistribution.
Installation and care tips
- Engage a qualified electrician for installation to ensure proper connection and safety compliance
- Follow manufacturer guidelines for mounting and any torque recommendations appropriate to your panel
- Keep a record of the part number HHJD63B300L for future maintenance and replacements to maintain consistent protection
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