Siemens CFD63B070 - 70 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens CFD63B070 is a 70A, 600V, 3-pole bolt-on molded-case circuit breaker crafted to deliver dependable branch-circuit protection in panelboards and load centers. Built for reliable performance in residential, commercial, and light industrial environments, this breaker combines sturdy construction with precise protection to keep electrical systems safe and operating smoothly.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose connections and trips in installations subject to equipment startup surges or mechanical vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits, helping protect both conductors and connected equipment from damage.
• OEM-compatible design is engineered to fit and perform with matching Siemens load centers and panelboards, ensuring seamless integration and reliable operation.
• Versatile for multiple industries—well-suited for residential, commercial, and light industrial applications where dependable protection and straightforward maintenance matter.

Technical snapshot

• Manufacturer: Siemens
• Part Number: CFD63B070
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and scenarios

• New installations in Siemens panelboards and load centers that require robust 3‑phase protection with a secure mounting method.
• Retrofits or replacements in existing Siemens-equipped systems where a bolt-on breaker is specified for bus integrity and reliable tripping.
• Commercial and light industrial electrical distributions with moderate to high-traffic loads, where stable protection and easy serviceability are priorities.
• Environments with vibration or mechanical activity (pumps, HVAC, manufacturing) where a bolted connection helps maintain a solid electrical connection over time.

Practical notes for installation and compatibility

Confirm that the system operating voltage and panelboard type match the CFD63B070’s 600V, 3‑pole specifications and that you’re using Siemens OEM load centers or panelboards to ensure optimal bus alignment and protection coordination. For installation, follow the manufacturer’s guidelines and torque recommendations to maintain secure mounting and reliable trip performance.