Siemens HFXD63B100L - 100 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HFXD63B100L is a 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. With a 100 A rating and a 600 V maximum, it handles substantial three-phase loads while maintaining compact, install-ready form for residential, commercial, and light industrial environments.

• Secure bolt-on mounting: provides a rigid, vibration-resistant bus connection that stays tight through equipment start-up and ongoing operation.
• Thermal-magnetic trip unit: combines a thermal element for overload detection with a magnetic element for rapid short-circuit tripping, ensuring stable, repeatable protection.
• OEM-compatible: engineered to pair with matching Siemens load centers and panelboards for a seamless, code-compliant installation.
• Versatile for multiple sectors: ideal for residential panels, commercial distribution, and light industrial circuits where reliable overcurrent protection is critical.

Technical specifications

• Manufacturer: Siemens
• Part number: HFXD63B100L
• 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

Use cases and practical scenarios

Install this 3-pole breaker in new or upgrade projects where a three-phase feed requires solid protection. It’s well-suited for three-phase HVAC feeders, commercial lighting circuits, and small industrial equipment power distribution. If you’re expanding a Siemens-based panel system, the HFXD63B100L provides compatible trip characteristics and mechanical fit to minimize retrofit time and avoid compatibility pitfalls.

Why this breaker stands out

• Rigid, vibration-resistant bus connections thanks to secure bolt-on mounting.
• Thermal-magnetic protection that delivers consistent responses to both overloads and short circuits.
• Explicit compatibility with Siemens OEM panelboards and load centers, eliminating guesswork during installation.
• Clear, practical applicability across residential, commercial, and light industrial settings for reliable, long-term protection.

Installation and safety notes

Ensure power is fully de-energized before any installation or service work. This bolt-on breaker should be installed by qualified electrical personnel in accordance with local codes and the panelboard’s instructions. Verify that the OEM load center is compatible with the HFXD63B100L to maintain correct trip performance and labeling.