Siemens MXD63H800L - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens MXD63H800L is a robust 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. With an 800A rating at 600V, this unit is built to interrupt substantial fault currents while maintaining reliable performance across a range of operating conditions.

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays tight through equipment start-ups and daily operation.
• Thermal-magnetic trip unit: combines precise thermal protection with instantaneous magnetic-trip response for short-circuit events, ensuring stable protection as loads vary.
• Three-pole design: ideal for 3-phase systems, delivering balanced protection in commercial and light industrial panels.
• OEM-compatible: engineered to integrate with matching Siemens load centers and panelboards, reducing installation complexity and ensuring coordinated protection.
• Comprehensive protection: specifically designed for branch-circuit overcurrent and short-circuit threats, helping prevent wiring damage and fire hazards.

Technical specifications

• Manufacturer: Siemens
• Part number: MXD63H800L
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage rating: 800 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and load centers

Ideal applications and practical use cases

Perfect for residential complexes with sizable feeder panels, small to mid-size commercial spaces such as offices or light industrial facilities, and retrofit projects where Siemens panelboards require compatible protection devices. The 800 A rating is suited for feeder and main protection in electrical rooms, while the 600 V rating covers typical building distribution equipment.

Why this model matters for your electrical system

Choosing the MXD63H800L means selecting a device designed to integrate smoothly into a Siemens protection ecosystem. The bolt-on mounting improves mechanical stability in environments with vibration, while the thermal-magnetic trip ensures predictable, repeatable response across temperature and load variations. When paired with matching OEM panelboards and loadcenters, it delivers reliable coordination, easier installation, and clearer troubleshooting during commissioning and maintenance.

Sold by AmpState, your source for durable Siemens protection components.