Siemens FXD63B150 - 150 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens FXD63B150 is a robust, three-pole bolt-on molded case circuit breaker built to safeguard your electrical distribution with precision and longevity. Designed for dependable branch-circuit overcurrent and short-circuit protection, it slots into panelboards and load centers that require durable, motor-friendly protection for 3-phase systems.

Why this breaker stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the bus bars, reducing loosening risks in busy panels and environments with equipment movement.
• Thermal-magnetic trip unit combines stable thermal protection with fast magnetic response, providing repeatable protection against overloads and immediate clearing of short circuits.
• OEM panel compatibility is tailored for seamless integration with matching Siemens panels, ensuring consistent performance and easier installation.
• High-capacity, 150 A, 600 V rating makes it suitable for demanding residential, commercial, and light industrial applications where reliable three-phase protection is essential.
• 3-pole configuration protects all phases of a 3-phase distribution, helping maintain balance and safety across your electrical system.

Ideal uses and scenarios

• Upgrading or replacing aging breakers in Siemens panelboards and load centers that require 3-phase overcurrent protection.
• New installations in commercial spaces, warehouses, or light industrial equipment where a sturdy bolt-on solution is preferred for long-term reliability.
• Service upgrades or retrofits in existing electrical rooms where consistent trip behavior and robust bus connections minimize downtime.

What problems it solves

• Prevents nuisance trips caused by loose connections or vibration by providing a secure bolt-on mount.
• Delivers dependable protection against sustained overloads and sudden short circuits with a calibrated thermal-magnetic response.
• Ensures compatibility and optimal performance within Siemens-made ecosystems, reducing mismatches and installation guesswork.

Technical specifications at a glance

• Manufacturer: Siemens
• Part number: FXD63B150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why choose it over alternatives

• Designed to mate seamlessly with Siemens OEM panels, reducing compatibility concerns and installation complexity.
• Bolted mounting and a rugged molded-case design yield reliable performance in environments with vibration, temperature swings, and frequent cycling.
• The 3-pole configuration ensures coordinated protection across all phases, which is essential for balanced 3-phase loads and equipment.

Ready for installation in your next project, the FXD63B150 provides precise protection, durable construction, and seamless Siemens compatibility. It’s a practical choice for professionals who need dependable, code-compliant 3-phase protection with straightforward, secure mounting.