Siemens MBKQJ3 A - 225 A, 3-Pole Circuit Breaker | AmpState

Meet the Siemens MBKQJ3A — a 225 A, 3-pole molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for tough electrical environments, this breaker helps you maintain system uptime by preventing damage from overloads and quick-acting faults.

Why this breaker stands out:

• Compact molded case design optimizes panel space, letting you fit more functionality into the same footprint without compromising protection.
• Thermal-magnetic trip unit provides stable, repeatable protection across a range of loads and temperatures, with fast magnetic response for short-circuit conditions.
• 3-pole configuration ideal for 3-phase systems, delivering coordinated protection across all conductors.
• OEM compatibility designed to pair with matching Siemens loadcenters and panelboards for streamlined replacement and dependable performance.
• Application versatility suitable for residential, commercial, and light industrial electrical distributions, including main service disconnects and feeder protection in larger panels.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: MBKQJ3A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 225 A
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Designed for durability and predictable performance, the MBKQJ3A helps you minimize downtime and maximize protection for your electrical distribution. Whether you’re upgrading an aging panel, installing a new commercial loadcenter, or equipping a light industrial system, this Siemens breaker offers a reliable, matched solution that you can trust.

Sold by AmpState, this MBKQJ3A part brings genuine Siemens engineering to your project with straightforward fitment into compatible panelboards and loadcenters. For best results, confirm the part number MBKQJ3A aligns with your Siemens panel model and follow standard electrical safety practices during installation. If you’re optimizing a three-phase distribution that demands consistent protection across all conductors, the Siemens MBKQJ3A 225 A 3-pole molded case circuit breaker is a precise, dependable choice that helps you protect your equipment and keep power flowing where it matters.