Residential Main Breakers

Why Residential Main Breakers?

Siemens main breaker kits (MBK) transform Siemens load centers into flexible, code‑ready mains with convertible, invertible installation in a compact, field‑proven design—helping contractors speed installs, cut SKUs, and keep upgrades compliant.

Portfolio examples:

MBK200A, 1‑phase, 200 A, 22 kAIC
MBK225A, 1‑phase, 225 A, 22 kAIC
MBK3100, 3‑phase, 100 A, 10 kAIC
MBK3175R, 3‑phase, 175 A, 10 kAIC

A Siemens Intelli-Arc welding robot with a torch attached to its arm, positioned in a factory setting.

Key benefits

Simplify panel conversions

Convert main‑lug Siemens load centers to main breaker in minutes with kit‑based hardware and clear instructions, minimizing downtime on retrofit jobs.

Reduce inventory risk

Use convertible, invertible designs that cover top or bottom feed and a range of amp ratings so fewer SKUs serve more applications.

Boost code confidence

Rely on UL 489 listed main breaker kits engineered for Siemens load centers to support compliant residential installations.

FEATURED CAPABILITIES

Cover the right amp ranges

Select single‑phase kits up to 225 A and three‑phase options to match service requirements across new builds and upgrades.

Install with plug‑in speed

Take advantage of panel‑mounted, plug‑in designs and included fillers that enable fast, repeatable field installation.

Match Siemens load centers

Use kits designed specifically for Siemens PL and related load centers to ensure proper fit and performance.