Siemens HFXD63B100 - 100 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HFXD63B100 is a 100A, 600V, 3-pole bolt-on molded case circuit breaker engineered to protect branch circuits in panelboards and load centers from overcurrent and short-circuit events. The secure bolt-on mounting delivers a rigid, vibration-resistant bus connection that helps maintain a solid, interruption-free power path in busy electrical cabinets.

At the heart of this breaker is a thermal-magnetic trip unit, providing stable, repeatable protection performance. The magnetic element responds quickly to short circuits, while the thermal element handles gradual overloads, ensuring dependable operation across a range of environmental conditions and electrical loads.

Designed for compatibility with matching OEM load centers and panelboards, the HFXD63B100 offers a seamless fit in Siemens-forward or Siemens-compatible installation environments. Its 3-pole configuration is ideal for three-phase distribution, making it well-suited for commercial and light-industrial panels as well as residential applications that require robust three-phase protection.

Key use cases and scenarios

• New installations in commercial or light-industrial panelboards where three-phase protection is required
• Upgrading or replacing aging breakers in compatible Siemens or OEM panels to restore reliable overcurrent protection
• Subpanel installations where a compact, bolt-on molded case breaker is preferred for secure mounting and dependable fault interruption

Why this matters for your electrical system

• Secure bolt-on mounting provides a rigid connection to the bus, reducing movement, vibration, and potential arcing over time
• Thermal-magnetic protection delivers dependable performance across temperature changes and load conditions
• OEM-compatible design ensures straightforward replacement or integration within compatible panelboards and load centers
• Three-phase suitability supports modern commercial and light-industrial electrical distributions

Technical snapshot

• Manufacturer: Siemens
• Part number: HFXD63B100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection