Siemens CQD240 - 40 A, 480 V, 2-Pole Circuit Breaker | AmpState

The Siemens CQD240 is a 40A, 480V, 2-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Engineered for reliable performance in demanding environments, this breaker is a smart choice for residential upgrades, commercial installations, and light industrial wiring where consistent protection matters.

• Compact molded case design maximizes panel space and simplifies installation, helping you fit more circuits into the same footprint without compromising protection.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overloads and short circuits, even as ambient temperatures fluctuate.
• 2-pole configuration and 40A rating efficiently protects two hot conductors in single- or split-phase circuits, making it ideal for feeders and essential loads in commercial applications.
• 480V voltage rating aligns with higher-voltage distribution needs often found in commercial and light industrial systems, offering robust protection for demanding equipment.
• OEM-compatible integration designed to work with matching Siemens OEM load centers and panelboards, ensuring a seamless, dependable protection scheme across your existing infrastructure.
• Versatile use cases suitable for residential panel upgrades, office and retail electrical rooms, and light industrial distributions—protecting lighting circuits, receptacle banks, motors, and feeders.

Why choose the CQD240 for your electrical distribution? Its compact yet rugged form factor keeps you space-efficient without sacrificing protection. The thermal-magnetic trip system delivers fast, predictable responses to overloads and faults, helping prevent damage to wiring and connected equipment. With compatibility across Siemens load centers and panelboards, you get a cohesive protection strategy that matches the rest of your system, reducing the guesswork during upgrades or maintenance.

Practical use scenarios include upgrading a panel to support additional 240V circuits in a small office, safeguarding HVAC feeders in a retail space, or protecting lighting and outlet circuits in a multi-tenant building. If you’re replacing an existing breaker, ensure the replacement matches the original current rating, voltage, and pole count to maintain consistent protection performance.

Invest in the Siemens CQD240 to deliver reliable, code-compliant protection for your critical electrical circuits. Built for real-world reliability in panelboards and load centers, it’s a thoughtful choice for installers and building operators who value precise protection and easy integration.