Siemens CQD350 - 50 A, 480 V, 3-Pole Circuit Breaker | AmpState

The Siemens CQD350 - 50A, 480V, 3-pole molded case circuit breaker is engineered to deliver dependable branch circuit protection in panelboards and loadcenters. Designed for demanding commercial and light industrial environments, this unit combines compact sizing with robust protection to keep electrical systems safe and running smoothly.

Key benefits

• Compact molded case design maximizes panel space, making it easier to fit multiple breakers in tighter enclosures without sacrificing performance.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overloads and short circuits, ensuring predictable trips under varying temperature conditions.
• OEM compatibility designed to pair seamlessly with matching Siemens OEM loadcenters and panelboards for reliable integration and consistent electrical characteristics.
• Versatile application suitable for residential, commercial, and light industrial distribution, delivering dependable protection across a range of circuits.

Technical snapshot

• Manufacturer: Siemens
• Part Number: CQD350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 480V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why this matters

When protecting critical circuits, a precise and reliable trip mechanism matters. The CQD350’s thermal-magnetic design delivers consistent protection across a wide range of operating conditions, reducing nuisance trips while ensuring quick response to dangerous short circuits. Its compact form helps you maximize panel capacity without compromising safety, and the intentional OEM alignment minimizes compatibility headaches during upgrades or panel replacements.

Ideal use cases

• Three-phase distribution panels in small to mid-size commercial spaces, feeding motors, lighting, and power circuits up to 50A per leg.
• Loadcenters and panelboards where space is at a premium but dependable overcurrent protection is non-negotiable.
• Retrofits or replacements within Siemens-compatible systems to maintain consistent protection characteristics and seamless operation.

Compatibility and installation notes

For best results, pair the CQD350 with matching Siemens OEM loadcenters and panelboards to preserve protection performance and ensure correct mounting and electrical fit. Verify that your installation voltage and circuit requirements align with the 480V, 50A, 3-pole configuration, and follow standard electrical practices for mounting, wiring, and torque specifications according to local codes and manufacturer guidelines.

Equip your panel with a reliable, space-efficient protection solution that delivers stable, repeatable performance when it matters most. The Siemens CQD350 is built to safeguard your electrical system with clarity, compatibility, and confidence.