Siemens HMG3B800L - 800 A, 3-Pole Circuit Breaker | AmpState

Introducing the Siemens HMG3B800L—a reliable 800A, 3-pole molded case circuit breaker built to safeguard large electrical feeders in panelboards and load centers. Designed for durability and consistent protection, this unit fits seamlessly into residential, commercial, and light industrial installations where robust overcurrent and short-circuit protection is essential.

• Compact molded case design optimizes panel space, helping you maximize usable capacity without sacrificing protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding accurately to both overloads and short circuits across varying temperatures and load conditions.
• 3-pole configuration provides reliable 3-phase protection with coordinated operation for balanced circuits.
• OEM compatibility designed to pair with matching Siemens load centers and panelboards for straightforward installation and maintained listing.
• Versatile application suitable for high-current branch circuits in residential, commercial, and light industrial environments.

Technical specifications

• Manufacturer: Siemens
• Part Number: HMG3B800L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 800 A
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why this matters for your electrical system

When you’re wiring panels that handle substantial loads, you need protection you can trust. The HMG3B800L’s rugged molded case design reduces footprint while delivering precise tripping behavior, minimizing nuisance trips and safeguarding wiring, devices, and downstream equipment. The thermal-magnetic mechanism protects both from sustained overloads and sudden short circuits, helping you maintain uptime and safety in demanding environments.

Best use scenarios

• Large residential subpanels serving high-demand circuits
• Commercial distribution panels with sizable feeders
• Light industrial panelboards requiring dependable 3-phase protection

For installers and facilities managers who prioritize reliability and compatibility, the Siemens HMG3B800L offers a precise, space-efficient solution that aligns with Siemens’ panel ecosystems, ensuring straightforward integration and consistent performance over time.