Molded Case Circuit Breakers

Molded case circuit breaker basic information

Molded case circuit breakers are among the most frequently replaced components in commercial and industrial electrical systems. Contractors and maintenance teams often need to match existing breaker frames, trip ratings, and manufacturer specifications when repairing panelboards or switchboards that may have been installed decades ago. Sourcing the correct breaker quickly—especially for legacy or discontinued models—is critical to keeping projects moving and minimizing downtime.

Bay Power maintains a large inventory of new, used, and obsolete molded case circuit breakers from all major manufacturers, including hard-to-find and discontinued models. Our team regularly helps contractors and facilities professionals identify compatible replacements and locate breakers that may be difficult to source through standard channels, allowing electrical systems to be repaired or expanded without the delays of factory lead times.

If you don't see the breaker you need listed on our website, or if you don't know what breaker is in your panel and need help determining what to use as a replacement, contact us, we can help. 

Condition Options

NEW: Breaker is brand new in box, and ships with original manufacturer packaging and has never been installed or energized. In most cases the packaging is unopened.

USED: Breaker has been previously energized and/or installed, and is reconditioned and tested by our certified technicians before shipping out. All used breakers meet original OEM standards.

Warranty

All breakers come with a one-year replacement warranty, minimum, with some new items carrying multi year factory-backed warranties.