MCB (Miniature Circuit Breaker) vs MCCB (Molded Case Circuit Breaker)
An MCB (Miniature Circuit Breaker) and an MCCB (Molded Case Circuit Breaker) are both protective devices used to interrupt electrical faults, but they differ mainly in their capacity and applications.
MCBs are designed for low current circuits, typically up to 125 amps, and are commonly used in residential and small commercial settings to protect lighting and socket circuits.
They have a fixed trip setting and a lower breaking capacity, usually up to 10kA.
In contrast, MCCBs are built for higher current ratings—up to 2500 amps or more—and are used in industrial and large commercial applications to protect heavy equipment like motors and transformers.
MCCBs offer adjustable trip settings, higher breaking capacities (up to 100kA), and are physically larger and more robust.
While MCBs are simpler and more economical, MCCBs provide more flexibility and are better suited for high-load and high-risk environments.
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