Siemens CQD130 - 30 A, 277 V, 1-Pole Circuit Breaker | AmpState

Introducing the Siemens CQD130 — a 30A, 277V, 1-pole molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. This compact unit is built to maximize panel space while providing precise, dependable performance when protection is critical.

The CQD130 pairs a thermal-magnetic trip mechanism with a rugged molded case design, delivering stable, repeatable protection for both overloads and short circuits. The thermal element responds to sustained overcurrent, while the magnetic element reacts rapidly to high-magnitude faults, helping to minimize damage to conductors and connected equipment.

Key benefits that matter in real-world installations

• Space-efficient design: A compact molded-case form frees valuable panel space, making it ideal for crowded panels, retrofit projects, and new installations alike.
• Reliable protection portfolio: Thermal-magnetic operation provides consistent trip performance, reducing nuisance trips and ensuring quick response to dangerous faults.
• 277V readiness: Specifically suited for commercial lighting, motor control, and other 277V circuits common in office buildings and light-industrial environments.
• Simple, single-pole protection: 1-pole design offers straightforward, single-phase protection for individual branch circuits.
• Seamless compatibility: Engineered to pair with matching Siemens OEM load centers and panelboards, enabling straightforward replacements and dependable system integration.

Who should consider the CQD130?

• Facility managers maintaining commercial panelboards that require dependable 30A protection for 277V circuits.
• Electrical contractors seeking a compact, easy-to-install breaker that fits Siemens and compatible OEM panels.
• Projects involving 277V lighting, receptacle circuits, or light industrial equipment where space savings and reliable protection are priorities.

Applications and practical use cases

• Protect 277V lighting and distribution circuits in office, retail, and hospitality environments.
• Upgrade aging panelboards with a compact 30A, single-pole solution to improve protection density without expanding panel footprint.
• Serve as a dependable substitute in compatible Siemens panelboards for routine maintenance or circuit upgrades.

Technical snapshot

• Manufacturer: Siemens
• Part number: CQD130
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 30 A
• Voltage rating: 277 V
• Poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Tip for installers: Always verify panelboard compatibility and adhere to local electrical codes and Siemens installation guidelines to ensure optimal performance and safe operation. The CQD130 is built to deliver long-term protection with straightforward integration into compatible Siemens load centers and panelboards.