Siemens CQD280 - 80 A, 480 V, 2-Pole Circuit Breaker | AmpState

Siemens CQD280 is a dependable 80A, 480V, 2-pole molded case circuit breaker designed to protect branch circuits in panelboards and load centers from overcurrent and short circuits. Built for durable performance in residential, commercial, and light industrial environments, this device ensures reliable protection where it matters most.

Key differentiators that matter in the real world

• Compact molded case design maximizes panel space and simplifies installation, helping you fit more protection where you need it without crowding the enclosure.
• Thermal-magnetic trip unit delivers stable, repeatable protection across a wide range of loads and ambient conditions, reducing nuisance trips and improving safety margins.
• OEM compatibility is built to work with matching Siemens load centers and panelboards, ensuring seamless integration and consistent electrical performance.
• Versatile applications—suitable for residential basements, commercial offices, and light industrial setups that require solid 2-pole 80A protection at 480V.

Technical snapshot

• Manufacturer: Siemens
• Part Number: CQD280
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 480V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and scenarios

• Protecting individual branch circuits in commercial panelboards and load centers where 480V distribution is standard
• Upgrading or replacing aging breakers in existing Siemens OEM systems to maintain consistent performance and compatibility
• Feeder protection in light industrial installations that demand a reliable 80A, 480V solution

Why this matters for your electrical system

The CQD280 combines a compact form factor with a thermal-magnetic trip mechanism, delivering predictable response during short circuits and steady operation during normal loading. This means fewer unexpected outages, improved safety for occupants, and easier panel management when you’re organizing multiple circuits within a single enclosure.

Installation and compatibility notes

Designed to be used with Siemens OEM load centers and panelboards, the CQD280 ensures aligned trip curves and electrical coordination with other Siemens protection devices. Installers should follow standard electrical codes and practices, verify panel compatibility, and torque connections to the manufacturer’s specifications for optimal performance.

When you need reliable, stout protection for 80A circuits in 480V systems, the Siemens CQD280 provides a precise balance of space efficiency, protective reliability, and seamless integration with existing Siemens panel infrastructure.