Siemens BQD350 - 50 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens BQD350 — a 50A, 480V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits with reliability in panelboards and load centers. Built for consistent performance across commercial, residential, and light industrial environments, this device pairs a secure mounting solution with precise protection that you can trust.

• Bolt-on mounting: secure, vibration-resistant bus connection that stays tight in busy electrical rooms and equipment enclosures.
• Thermal-magnetic trip unit: delivers stable, repeatable protection against overloads and short circuits, with fast magnetic response for sudden faults.
• Three-pole design: ideal for 3-phase circuits, ensuring coordinated protection across all phases.
• 480V rating: suitable for medium- and high-voltage commercial and light industrial applications.
• OEM compatibility: designed to pair with matching Siemens OEM panelboards and load centers for seamless integration.
• Versatile applications: perfect for panelboard upgrades, new construction, or retrofit projects in offices, data centers, machine rooms, or HVAC equipment.

Technical snapshot

• Manufacturer: Siemens
• Part number: BQD350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 50A
• Voltage rating: 480V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the Siemens BQD350 over other options? It combines a robust bolt-on mount with a proven thermal-magnetic trip that adapts to real-world load swings, keeping systems safe without nuisance trips. The 3-pole configuration supports balanced 3-phase distribution, reducing the risk of phase imbalances that can damage equipment and productivity.

Designed for compatibility with Siemens OEM load centers, this breaker slides into place in compatible panelboards with confidence, delivering a dependable, long-lasting protection solution for commercial spaces, light industrial setups, or residential multi-panel systems that demand industrial-grade reliability.

Practical use cases include upgrading a panelboard in a storefront electrical room, protecting a 3-phase air handling unit, or equipping a small manufacturing panel with a clean, secure 3-pole bolt-on breaker that resists vibration and arcing.

To maximize longevity and performance, ensure the panelboard and bus are rated for 480V, confirm the BQD350's 50A setting aligns with the circuit load, and follow standard electrical safety practices during installation. For a clear match in catalogs and searches, look for Siemens BQD350 50A 480V 3-pole bolt-on molded case circuit breaker — a reliable choice for panel protection that meets the demands of modern electrical systems.