Siemens HLMXD63B800L - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HLMXD63B800L is a rugged, 3‑pole bolt-on molded case circuit breaker engineered to protect large branch circuits with precision. Rated for 800 A at up to 600 V, this device is purpose-built for panelboards and load centers found in commercial and light industrial settings, while still handling demanding residential installations with high power demands.

• Secure bolt-on mounting: Delivers a rigid, vibration‑resistant bus connection to minimize loosening and arc‑susceptibility in dynamic enclosures.
• Thermal-magnetic trip unit: Combines reliable overload protection with instantaneous short‑circuit response, yielding stable, repeatable protection across changing loads.
• 3‑pole configuration: Ideal for 3‑phase circuits, consolidating protection for all three phases in a single, compact device.
• 800 A, 600 V rating: Designed for higher‑demand applications, from service feeders to motor circuits, where robust protection is essential.
• OEM‑compatible design: Made to integrate smoothly with matching Siemens OEM load centers and panelboards for straightforward replacement and consistent performance.

Where this breaker shines

In commercial environments, multi‑unit residences, or light industrial facilities, the HLMXD63B800L provides reliable protection for large feeders and essential equipment. The bolt‑on mounting reduces installation variability and helps maintain strong electrical integrity in panels that experience vibration or movement.

Practical benefits and use cases

• Protects three‑phase machinery and heavy loads without the need for multiple single‑pole devices.
• Minimizes nuisance trips with coordinated thermal and magnetic trip actions, helping maintain uninterrupted operation for critical circuits.
• Streamlines maintenance and stocking for fleet electricians by aligning with Siemens panelboard ecosystems.
• Suitable for residential high‑demand service panels, commercial distribution boards, and light industrial equipment rooms that require robust overcurrent and short‑circuit protection.

Installation and compatibility notes

Designed for use as a branch circuit overcurrent and short‑circuit protector, the HLMXD63B800L is intended to pair with Siemens‑branded panelboards and load centers. Its bolt‑on mounting provides a solid, long‑lasting connection, while the 3‑pole configuration ensures comprehensive protection across all phases of a 3‑phase system. When replacing or upgrading protection in Siemens‑equipped installations, this unit offers a direct, reliable upgrade path with minimal modification.