Siemens MXD63B800 - 800 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens MXD63B800 — a rugged 800A, 600V, 3‑pole bolt-on molded case circuit breaker designed to protect your electrical system with precision and reliability. Built for dependable branch circuit overcurrent and short‑circuit protection, it integrates seamlessly into panelboards and load centers that require a durable, consistent protection device.

• Secure bolt-on mounting: delivers a rigid, vibration‑resistant bus connection to minimize movement and maintain steady electrical contact in demanding environments.
• Thermal‑magnetic trip unit: combines time‑delay thermal protection with instantaneous magnetic response for stable, repeatable protection performance across a range of fault conditions.
• OEM‑compatible design: engineered to be compatible with matching Siemens load centers and panelboards for straightforward replacements and reliable system integration.
• Versatile application: suited for residential, commercial, and light industrial electrical protection needs where robust branch circuit protection is essential.

Technical snapshot

• Amperage rating: 800A
• Voltage rating: 600V
• Poles: 3
• Mounting style: Bolt-on molded case circuit breaker
• Application: Branch circuit overcurrent and short‑circuit protection

Use cases and benefits

• Protects individual branches in panelboards and load centers, ensuring quick disconnection during overloads and short circuits.
• Ideal for installations where vibration resistance and a secure bus connection reduce the risk of loose connections and downtime.
• Supports higher protection demands in commercial spaces or light industrial environments without sacrificing reliability.

Why choose the MXD63B800? Its bolt‑on construction, paired with a thermal‑magnetic trip system, delivers predictable protection behavior and long‑term durability in real-world operating conditions. When you need a dependable, high‑capacity breaker that plugs into compatible Siemens panelboards and load centers, this 3‑pole unit provides clear, actionable protection for your wiring, devices, and occupants. For installers and facility managers, it offers a straightforward path to robust branch circuit protection with minimized installation surprises and maintenance concerns.