Siemens HMD63F800 - 800 A, 600 V, 3-Pole Circuit Breaker | AmpState

Siemens HMD63F800 is an 800A, 600V, 3-pole molded case circuit breaker built to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers.

Its compact molded-case design maximizes panel space, while a thermal-magnetic trip unit provides stable, repeatable protection performance under diverse electrical loads. Designed to work with matching OEM load centers and panelboards, it offers a reliable, plug‑and‑play solution for Siemens-based electrical installations.

• 800 A amperage rating for heavy-duty feeders and distribution circuits
• 3-pole configuration for 3-phase protection and coordination in commercial or industrial panels
• 600 V voltage rating suitable for typical commercial/industrial distribution systems
• Compact molded case design to conserve panel space and simplify wiring
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits
• OEM compatibility with Siemens and matching panelboards/load centers for guaranteed fit and performance
• Applications: ideal for residential, commercial, and light industrial settings requiring robust branch-circuit protection

Typical use cases include installing or upgrading distribution panels in commercial buildings, protecting large feeders in light industrial setups, or replacing an aging MCCB within Siemens ecosystem to maintain consistent trip characteristics and fault isolation.

Technical specifications

• Manufacturer: Siemens
• Part Number: HMD63F800
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 800 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the HMD63F800 over generic MCCBs? This model provides designed‑in compatibility within the Siemens ecosystem, ensuring form, fit, and function that align with OEM panelboards. The 3‑pole arrangement supports coordinated protection across three phases, while the compact frame makes installation cleaner and more scalable in space‑constrained panels. For engineers and electricians building or maintaining Siemens‑based electrical systems, this breaker minimizes compatibility risk and delivers predictable performance during fault events.

Practical tips: verify compatibility with your specific panelboard model, follow manufacturer torque specs for lugs, and plan for proper clearance and cooling around the breaker to maintain optimal trip response. If you’re retrofitting an existing Siemens installation, keep a log of the breaker’s trip characteristics to ensure ongoing coordination with upstream devices and downstream protection.