CQD330 - 30Amp Circuit Breaker

CQD330 - 30Amp Circuit Breaker

The Siemens CQD330 is a 3-pole, 30 amp circuit breaker designed for 480/277V Siemens CQD panelboard systems. In most cases, it’s used as a direct replacement part, meaning it’s chosen to match an existing breaker already installed in the panel. That makes it a practical option for maintenance work where keeping everything consistent is more important than changing the setup.

You’ll typically find this breaker in commercial lighting systems, small to mid-size three-phase circuits, and general distribution panels. The 30A rating works well for lighter loads, while the 14kA interrupt rating provides standard protection for this type of application. It’s a dependable fit for facilities that need to keep existing Siemens systems operating without interruption or redesign.

Because it mounts on DIN rail, installation is straightforward and the breaker sits neatly inside the panel. It helps keep wiring organized and makes future servicing or replacements easier when maintenance comes around again.

Key Features and Benefits

• Siemens CQD series breaker for existing panel systems
• 30 amp, 3-pole design for 480/277V applications
• 14kA interrupt rating for standard circuit protection
• DIN rail mounting for quick, clean installation
• Commonly used in lighting and three-phase distribution circuits
• Ideal for like-for-like replacement in CQD panels
• Helps maintain system consistency across installed equipment
• Compact design supports organized panel layouts
• Makes maintenance and future swaps more straightforward

Technical Specifications

• Model: CQD330
• Series: Siemens CQD
• Amperage: 30A
• Poles: 3
• Voltage Rating: 480/277V AC
• Interrupt Rating: 14kAIC
• Mounting Type: DIN rail
• Application: Three-phase branch circuit protection

Material Compliance and Certifications

Manufactured in accordance with applicable UL and IEC standards for molded case circuit breakers used in commercial electrical distribution systems. Installation should be completed by qualified personnel following all local electrical codes and safety requirements.

Where It Works Best

• Existing Siemens CQD panelboard systems
• Commercial lighting and branch circuit distribution
• 480V three-phase electrical systems
• 277V lighting control applications
• Facility maintenance and breaker replacement work
• Industrial and commercial control panels
• DIN rail panel layouts where space and order matter
• Like-for-like CQD series replacements in installed systems