Residential Main Breakers

Residential Dual-Function Circuit Breakers (AFCI & GFCI)

The breaker that changed the world as we know it

Siemens main breakers (MBK) are designed to allow for convertibility and invertiblilty of Siemens load centers. With truly ground-breaking performance, the MBK can do just about anything it is asked.

For technical information and specifications on the product line click below

Learn now

Features & Benefits:

  • Bolt-on main breaker for Siemens single phase load centers
  • Converts main lug load centers to main breaker load centers
  • Straight-in wired design reduces wire cost
  • UL listed

Find where to buy Siemens products with our distributor locator and at participating retail partners in the U.S.

Downloads and support

Take advantage of our services

Here you will find important information, documents, and addresses relating to low voltage power distribution and electrical installation technology.

24 Hour Tech Support Hotline

Contact Us

Get in contact with our sales support and customer service for low voltage power distribution

Do you need help on a concrete project? Do you need a quote for any of our products or solutions? Do you need support for your installed equipment? Do you have a technical question? Do you need something totally different? You can contact us 24/7. We are looking forward to your call or online request.

contact-siemens
Contact our customer service

Contact us now