Siemens | MBKQJ1150 | Circuit Breaker | 150A | 2-Pole | 240V | 10kA | Bolt-On

Siemens MBKQJ1150 Circuit Breaker is a bolt-on, two-pole protection solution designed for reliable performance in compatible Siemens panels. With a 150A rating at 240V and a 10kA interrupting capacity, this breaker is built to safeguard feeders and main circuits from electrical faults while supporting steady, uninterrupted operation in demanding environments.

Key specifications at a glance

• Amperage: 150A
• Poles: 2-Pole
• Voltage: 240V
• Interrupting capacity: 10kA
• Mounting type: Bolt-On

What makes this breaker stand out

Designed for retrofit, maintenance, and replacement scenarios, the MBKQJ1150 offers a precise fit for Siemens bolt-on panel configurations. Its bolt-on design provides a secure mechanical connection that resists loosening under vibration or transient loads, helping to maintain consistent electrical protection over time. The 10kA interrupting rating ensures it can safely interrupt high fault currents typical in commercial and industrial settings, adding an important layer of protection for downstream equipment and wiring.

Ideal use cases

• Upgrading service equipment to accommodate higher demand feeders in commercial spaces
• Replacing worn or damaged breakers in compatible Siemens bolt-on panels
• Retrofit projects where maintaining exact ANSI/UL compliance with Siemens components is essential
• New installations requiring a rugged, high-current 240V two-pole protection device

Installation and compatibility guidance

• For best results, confirm fit and ratings before ordering. The part number MBKQJ1150 is the best reference for compatibility.
• This is a bolt-on style breaker, intended for panels that support bolt-on mounting. Ensure your panel model accepts this configuration.
• Plan for a safe, controlled installation by a qualified electrician. Power should be fully isolated before any replacement or retrofit work.
• Use as part of a broader protection strategy that matches the panel’s fault current rating and overall system design.

With the Siemens MBKQJ1150 circuit breaker, you gain a purpose-built solution crafted to deliver dependable protection for demanding electrical layouts. Its precise specifications, paired with a robust bolt-on design, make it a thoughtful choice for panel upgrades, replacements, or new installations that require a reliable 150A, 240V, 2-pole breaker with a 10kA interrupting capacity.