Schneider | Molded Case Circuit Breakers - MCCBs

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What is an MCCB

What is a MCCB?

MCCB (full form: Molded Case Circuit Breaker) is an electrical protection device to protect electrical circuits from damage by overcurrent. Prevents overload, short circuit, and switching of circuits. About ComPact Molded Case Circuit Breakers, MCCB. Protect cables sized for 100A to 3200 A. They now come with various sizes, intelligent metering and monitoring, and with integrated earth leakage protection. Their highest breaking capacities allow them to protect also smaller cables, when connected close to a powerful energy source. As one pillar of digitally connected power distributions (EcoStruxure Power), ComPact breakers take part in energy consumption and asset management optimization. Benefit from 65 years of technological leadership, and rely on proven quality, opted for even in most demanding environments.

How does MCCBs work?

MCCB uses a temperature-sensitive device, also known as a temperature element, with a current-sensitive electromagnetic device, also known as a magnetic element, to provide the trip mechanism for protection and isolation purposes. With this, it can ensure overload protection, prevent short circuit and act as an electrical disconnector switch.

Source: Schneider Electric

MCB vs MCCB

MCB MCCB
Miniature Circuit Breaker Molded Case Circuit Breaker
MCB is an electromechanical device that switches off the circuit automatically if an abnormality is detected. The MCB easily senses the overcurrent caused by the short circuit. MCCB is an electrical protection device to protect electrical circuits from damage by overcurrent. Prevents overload, short circuit, and switching of circuits.
The rating current of MCB is 100A  with an interrupting rating of under 18.000A. MCCBs are rated current in the range of 10A-2.500A. MCCB’s interrupting rating ranges from around 10.000A to 200.000A
MCB trip characteristics may not be adjusted since they basically cater to low circuits. MCCB comes with an adjustable trip characteristic for the higher models.
MCB is mainly used for low-energy requirements, like home wiring or small electronic circuits. MCCB is more suited in providing energy for high-power equipment like commercial and industrial use.

MCCB Ranges by Schneider

Schneider-MCCB - ComPacT NSxm new generation

Circuit-breakers, to protect lines up to 160A

Schneider-MCCB - ComPacT NSX new generation

Circuit-breakers, to protect lines up to 630A

Schneider-MCCB - ComPact NSX

Circuit-breakers, to protect lines carrying up to 630A

Schneider-MCCB - Compact NSX for Direct Current

Circuit-breakers and switch-disconnectors, to protect lines up to 1500A, in direct current (DC) and photovoltaic (PV) applications

Schneider-MCCB - ComPact NSXm

Circuit-breakers, to protect lines carrying up to 160A

Schneider-MCCB ComPact NS

Circuit-breakers, to protect lines carrying up to 3200A

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