Siemens FXD63B175L - 175 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens FXD63B175L is a 175 A, 600 V, 3-pole bolt-on molded case circuit breaker engineered to protect electrical branch circuits in panelboards and loadcenters. Built for dependable overcurrent and short-circuit protection, it helps keep homes, offices, and light industrial spaces powered safely.

Key benefits of this unit include a secure bolt-on mounting that delivers a rigid, vibration-resistant bus connection — essential for panels subject to vibration or long-term operation. The thermal-magnetic trip unit provides stable, repeatable protection: the thermal element handles overloads with predictable time delays, while the magnetic element delivers instantaneous response to short circuits. This combination minimizes nuisance trips and short-circuit damage while maintaining fast protection when it matters most.

• Bolt-on mounting: delivers a rigid, vibration-resistant connection to the bus bars in compatible Siemens panelboards and loadcenters.
• Thermal-magnetic trip unit: combines overload protection with an instantaneous magnetic trip to guard against damaging faults.
• Three-pole design: ideal for balanced 3-phase distribution and simultaneous protection of all conductors.
• 175 A, 600 V rating: suitable for larger branch circuits in residential, commercial, and light industrial settings.
• OEM compatibility: designed to fit matching Siemens panelboards and loadcenters for streamlined retrofits and installations.
• Reliable protection for panel upgrades: part of a robust protection strategy for electrical distribution where consistent performance matters.

What problems does it solve?

In any panel, protecting conductors from overcurrent and short circuits is critical. The FXD63B175L delivers dependable, repeatable trip performance across operating temperatures, ensuring that circuits are opened quickly in a fault while staying out of the way during normal operation. It’s a strong choice when you need a sturdy, field-replaceable solution that fits standard Siemens equipment.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: FXD63B175L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 175 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Upgrade your panel with a proven, high-capacity protection solution. The FXD63B175L is ready for residential, commercial, or light industrial distribution where reliability and performance matter. Order today to ensure your panelboard or loadcenter has the precise, secure protection it needs to keep systems running smoothly.