Siemens LXD63B450 - 450 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens LXD63B450 — a robust, high-capacity 3-pole bolt-on molded case circuit breaker designed to shield your panelboards and loadcenters from overcurrent and short-circuit events. Rated at 450A and 480V, this unit is purpose-built for demanding 3-phase environments where reliability matters as much as protection.

Precision protection you can trust

Engineered with a thermal-magnetic trip unit, the LXD63B450 delivers stable, repeatable protection across a wide range of operating conditions. This means fewer nuisance trips during temp swings or startup surges, and a faster, more predictable response when faults occur. The result is safer equipment, reduced downtime, and peace of mind for both routine maintenance and emergency service scenarios.

Key differentiators that matter in the field

• Bolt-on mounting provides a secure, vibration-resistant connection to the bus, minimizing movement and maintaining alignment in busy electrical environments.
• 3-pole design is ideal for 3-phase systems, ensuring synchronized protection for all phases and balanced load distribution.
• High-capacity compatibility with 450A and 480V ratings supports high-load branch circuits typical in commercial and light industrial settings.
• OEM-friendly compatibility crafted to pair with matching Siemens OEM loadcenters and panelboards for straightforward upgrades, replacements, or retrofits.

Where this breaker truly shines

• Residential projects that require robust 3-phase protection in subpanels or main distribution points.
• Commercial installations with equipment startups, such as HVAC systems, pumps, and large motors, where reliable trip performance protects both people and equipment.
• Light industrial environments needing a dependable bolt-on solution that minimizes downtime during maintenance or panelboard upgrades.

What you get with the LXD63B450

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays fastened through operational stresses.
• Thermal-magnetic trip unit delivering precise, repeatable protection characteristics you can rely on day in and day out.
• Compatibility with Siemens OEM load centers and panelboards for cohesive system integration and simplified sourcing.
• Clear, industry-standard specifications: 450A, 3-pole, 480V, molded case construction designed for durable performance in demanding environments.

Technical snapshot

• Manufacturer: Siemens
• Part Number: LXD63B450
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 450A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

When reliability, precise protection, and compatibility with Siemens panel ecosystems matter most, the LXD63B450 stands out. It’s a purpose-built solution for high-demand panels and distribution setups where dependable performance and easy maintenance converge. Trust AmpState to provide genuine Siemens protection you can count on through every load, surge, and startup moment.