Siemens MBK150M 150A 2P 240V Circuit Breaker, Plug-On | AmpState

The Siemens MBK150M is a 2-pole, 150A plug-on circuit breaker designed to deliver reliable overcurrent protection for panelboards, load centers, and distributed electrical systems. Its plug-on design makes retrofit work and maintenance planning straightforward, especially when keeping the exact part number on hand matters for procurement and service records.

Key specifications

• Manufacturer: Siemens
• Part number: MBK150M
• Amperage: 150 A
• Poles: 2
• Voltage: 240 V
• Mounting: Plug-On
• Availability: AmpState

Why MBK150M stands out

Designed for seamless integration with Siemens panelboards and load centers, the MBK150M provides dependable protection for feeders and branch circuits while supporting streamlined maintenance workflows. The plug-on mounting reduces installation time and minimizes panel downtime, making it a practical choice during upgrades or service cycles. For retrofit projects, the ability to preserve the original part number simplifies ordering, stocking, and documentation—keeping your electrical system consistent from one service event to the next.

Ideal use cases

• Retrofit and replacement in Siemens panelboards and load centers, where exact part-number continuity is important
• Maintenance planning for facilities with demanding electrical distributions that rely on reliable, long-term components
• Spare parts inventories for service teams that prioritize compatibility and quick installation

Need help confirming compatibility?

AmpState is ready to assist with part-fit confirmation. If you’re unsure whether MBK150M is the right choice for your equipment, send a message and we’ll help verify fit and ensure seamless integration with your existing panelwork.