What is an MCCB and When Do You Need One?
Moulded Case Circuit Breakers Explained for Contractors & Engineers
If you are designing or procuring electrical switchgear for a factory, commercial building, or large residential complex, you have likely come across the term MCCB (Moulded Case Circuit Breaker). Unlike the familiar MCB used in home distribution boards, an MCCB handles much higher currents and provides adjustable protection settings for industrial and commercial applications.
MCB vs MCCB — Key Differences
| Feature | MCB | MCCB |
|---|---|---|
| Current Rating | Up to 125A | 16A to 1600A |
| Breaking Capacity | Up to 10kA | Up to 85kA |
| Trip Settings | Fixed | Adjustable |
| Size | Small — fits in DB | Large — switchboard mounted |
| Typical Application | Homes, small offices | Factories, commercial mains |
When Must You Use an MCCB?
- Incoming protection for main LT panels in factories and large commercial buildings
- Feeder protection for sub-panels drawing more than 125A
- Motor protection in industrial motor control centres (MCCs)
- Bus coupler and bus section switches in HT/LT substations
Buy MCCBs in Gurgaon & Delhi NCR
+91-9311945078 | Complete MCCB range in stock | JSR Group, Gurgaon
