Siemens LMXD63B800 - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens LMXD63B800 is an 800 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built to endure demanding environments, it features a secure bolt-on mounting that creates a rigid, vibration-resistant bus connection for lasting reliability.

• Secure bolt-on mounting: ensures a rigid, vibration-resistant bus connection that stays put through years of operation.
• Thermal-magnetic trip unit: provides stable, repeatable protection by combining thermal sensing with magnetic coordination for fast response to short circuits.
• OEM compatibility: designed to match Siemens OEM loadcenters and panelboards for straightforward, worry-free installation and proven performance.
• Three-pole, high-capacity protection: 3-pole design rated at 800 A and 600 V, ideal for three-phase distribution in commercial and light industrial settings.

This unit is suitable for residential, commercial, and light industrial applications where robust protection is essential at the distribution level. It safeguards individual branch circuits within panelboards and loadcenters, helping to prevent damage from overcurrent and short circuits while maintaining safe, reliable operation.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: LMXD63B800
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 800 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the LMXD63B800 means selecting a proven, OEM-compatible solution that aligns with your existing Siemens panelboards and loadcenters. For installations requiring reliable three-phase protection, this bolt-on breaker offers a secure fit, predictable trip behavior, and durable performance in both new builds and panel upgrades.