Siemens HFD63B100 - 100 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HFD63B100 is a 100A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for professional reliability, it provides a solid foundation for safe, continuous electrical operation in demanding environments. Available through AmpState, this breaker is ready to integrate into Siemens-based electrical systems.

Why this breaker stands out

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection that reduces movement, improves contact stability, and minimizes nuisance trips caused by loose connections.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying temperatures and load conditions. The thermal element handles gradual overloads while the magnetic element reacts rapidly to short-circuit events.
• OEM-compatible design with matching Siemens panelboards and load centers ensures straightforward installation, predictable performance, and simplified maintenance.
• Versatile, three-phase protection ideal for residential, commercial, and light industrial applications requiring reliable 3-pole protection up to 100 A.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: HFD63B100
• 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

Practical use cases

In a 3-phase panel or load center, the HFD63B100 protects feeders and equipment up to 100 A—think three-phase motors, HVAC units, pumps, conveyors, and other commercial/industrial loads. For residential or light commercial installations, it provides robust protection for 3-phase circuits, ensuring quick disconnection during fault conditions while maintaining stable operation during normal loads. The bolt-on design simplifies mounting to compatible bus systems, making installation efficient in service upgrades or clean-panel upgrades.

Installation and compatibility tips

Ensure your panelboard or load center is designed for bolt-on molded case breakers and compatible with Siemens OEM components. Follow standard electrical safety practices for secure mounting and proper bus connection. This unit is intended for branch circuit protection within appropriate Siemens configurations, offering dependable performance when integrated into a compatible system.

Siemens HFD63B100 combines precise thermal-magnetic protection with a sturdy, vibration-resistant mounting, delivering reliable 3-phase protection in demanding environments. For projects requiring a 100 A, 3-pole bolt-on breaker that integrates smoothly with Siemens OEM panels, this device is a focused, dependable choice.