Circuit Breakers

Air Circuit Breakers

Air circuit breakers provide overcurrent protection for 800 – 1000A circuits. They are most commonly used in low and medium voltage applications. Unlike molded case circuit breakers, these are completely open making them easily adjustable. Since they are completely open, they are also easily reconditioned. Bay Power carries a wide variety of both new and reconditioned air circuit breakers.

Insulated Case Breakers

Insulated case circuit breakers can do everything a molded case circuit breaker can, except they contain a 2-step stored energy mechanism. Most commonly used in low voltage circuit breaker applications, insulated case circuit breakers use special insulating material when interrupting circuits. Insulated case circuit breaker frame sizes can range anywhere from 800-5000A.

Molded Case Circuit Breakers

Molded case circuit breakers protect against overloads, short circuits, and ground faults by using one or a combination of electromagnetic and/or thermomagnetic trip mechanisms. Molded case circuit breakers are exceptionally durable, can break larger currents, and can also be adjusted to trip for lower amounts.

Vacuum Circuit Breakers

Thanks to their arc-extinguishing vacuum chamber, vacuum circuit breakers are some of the most reliable circuit breakers around. Using this highly effective arc-extinguishing mechanism, they require much less maintenance and last much longer than their counterparts. However, they are most effective and most commonly used for medium voltage circuit breaker applications (33 kV - 66 kV).

Mini Circuit Breakers

Miniature circuit breakers (UL 489-rated), also known as DIN rail circuit breakers, are a small type of molded case circuit breaker. They are often used to break small currents as they can be reset, unlike a fuse that would need to be replaced, and are most commonly found in residential lighting circuits, industrial kitchen appliances, air conditioners, and more.