Siemens CQD340 - 40 A, 480 V, 3-Pole Circuit Breaker | AmpState

Siemens CQD340—a 40A, 480V, 3-pole molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to integrate seamlessly with matching OEM equipment, it delivers reliable performance where electrical distribution matters most.

Key Features

• Compact molded case design optimizes panel space, making it easier to fit multiple protection devices in tighter enclosures.
• Thermal-magnetic trip unit provides stable, repeatable protection performance, balancing overload and short-circuit responses for consistent operation.
• OEM compatibility specifically designed to work with matching Siemens panelboards and load centers for a clean, code-compliant installation.
• Versatile applications suitable for residential, commercial, and light industrial environments that require reliable 3-phase protection at 480V.

Ideal Applications and Use Scenarios

• feeders and branch circuits within Siemens panelboards and load centers
• 3-phase circuits in commercial spaces such as small offices, retail, or service areas
• Light industrial electrical distributions where compact protection solutions are essential

Technical snapshot

• Amperage rating: 40A
• Voltage rating: 480V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the CQD340 means opting for a proven, space-efficient solution that aligns with Siemens’ panelboard ecosystems, delivering dependable protection for 3-phase distribution at 480V. Its compact form, precise protection, and OEM compatibility help minimize installation complexity and maintenance concerns, so you can count on consistent performance across critical electrical infrastructure.