Siemens MXD63B700L - 700 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Engineered for demanding panel environments, the Siemens MXD63B700L delivers robust branch-circuit protection as a 700A, 600V, 3-pole bolt-on molded case circuit breaker. Built to sit securely in panelboards and load centers, it’s ready for residential, commercial, and light industrial installations where reliability is non-negotiable.

Why this breaker stands out

• Secure bolt-on mounting: creates a rigid, vibration-resistant bus connection that stays put under heavy loads and through panel activity, reducing the risk of loose connections and nuisance trips.
• Thermal-magnetic trip unit: combines predictable thermal overload protection with instantaneous magnetic trips for short-circuit events, delivering stable, repeatable protection curves across varying temperatures and loads.
• OEM-load center compatibility: designed to integrate with matching Siemens OEM load centers and panelboards for consistent performance and straightforward replacement.
• Versatile, high-capacity protection: ideal for protecting branch circuits and motor feeders in a wide range of facilities, from home service panels to light industrial distribution boards.

Technical snapshot

• Manufacturer: Siemens
• Part Number: MXD63B700L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 700 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and outcomes

In a residential service panel, the MXD63B700L provides dependable protection for main feeders and sub-feed circuits facing surges and motor starting currents. In commercial spaces, it offers scalable protection for distribution panels feeding lighting, HVAC, and office equipment. In light-industrial settings, its 700 A rating supports larger feeders and equipment with confidence, minimizing downtime and wiring damage from short circuits.

Practical tips for installation and care

• Verify compatibility with your existing Siemens load center or panelboard to ensure a seamless fit and optimal trip performance.
• Ensure the mounting area is clean and free of debris before bolt-on installation to achieve the full vibration-resistant benefits.
• Consider keeping a spare MXD63B700L on hand for service continuity in critical installations where panel downtime is costly.