MCCBs

MCCBs (Moulded Case Circuit Breakers) are an electrically operated switch designed to protect an electrical circuit from damage caused by overcurrent, typically resulting from an overload or short circuit.
How do they work?
The basic function of an MCCB is to interrupt current flow after a fault, once the fault is corrected the circuit breaker can be reset (either manually or automatically) to resume normal operation.
MCB or MCCB
Although MCBs and MCCBs both are circuit breakers, there are key differences between the two that make them suitable for specific jobs. The main difference between the two is the capacity, MCBs are rated under 100 amps with an interrupting rating of under 18,000 amps. Consequently, the trip characteristics may not be adjusted since they cater to low circuits. On the other hand, an MCCB comes with an adjustable trip characteristic for the higher loads. An MCCB would typically provide amps as high as 2500 or as low as 10, depending on the application. The interrupting rating of MCCBs range from around 10,000 amps to 200,000 amps.

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Description Price Range Series Number of Poles Current Rating Breaking Capacity Breaking Capacity at Maximum Voltage Rating Rated AC Voltage Rated DC Voltage Mounting Style Length Width Depth Break Time Circuit Breaker Type
RS Stock No. 849-4179
Mfr. Part No.LV429850
HK$4,267.12
Each
units
NSX Range LV4 4 100A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 454-8073
Mfr. Part No.259079 & NZMB1-A100
BrandEaton
HK$2,006.46
Each
units
XEnergy NZM1 3 100A - 25 kA 440V - - 90mm 145mm 84.5mm - -
RS Stock No. 454-8039
Mfr. Part No.259075 & NZMB1-A40
BrandEaton
HK$1,938.39
Each
units
XEnergy NZM1 3 40A - 25 kA 440V - - 90mm 145mm 84.5mm - -
RS Stock No. 849-4377
Mfr. Part No.LV430851
HK$6,028.88
Each
units
NSX Range LV4 4 160A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 849-4188
Mfr. Part No.LV429851
HK$4,267.12
Each
units
NSX Range LV4 4 100A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 831-9172
Mfr. Part No.1SDA067416R1
BrandABB
HK$2,313.51
Each
units
Protecta XT1N 3 100A - 36 kA 690V 500V DIN Rail Mount 76.2mm 130mm 70mm - -
RS Stock No. 849-4181
Mfr. Part No.LV429852
HK$3,568.20
Each
units
NSX Range LV4 4 100A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 849-4545
Mfr. Part No.LV431841
HK$8,247.24
Each
units
- - - - - - - - - - - - - -
RS Stock No. 849-4191
Mfr. Part No.LV429856
HK$3,568.20
Each
units
NSX Range LV4 4 100A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 628-8054
Mfr. Part No.265725 & NZMN2-M200
BrandEaton
HK$5,760.38
1 Box of 1
Box(es)
XEnergy NZM2 3 200A - 50 kA 690V 750V - 105mm 184mm 149mm - -
RS Stock No. 831-9179
Mfr. Part No.1SDA068058R1
BrandABB
HK$4,635.95
Each
units
Protecta XT3N 3 200A - 36 kA 690V 500V DIN Rail Mount 105mm 150mm 70mm - -
RS Stock No. 731-9540
Mfr. Part No.4 067 72
BrandLegrand
HK$296.18
Each
units
- DNX3 1P 6 A 4.5 kA - 230 V - DIN Rail - - - - -
RS Stock No. 537-5545
Mfr. Part No.259093 & NZMN2-A200
BrandEaton
HK$5,179.92
Each
units
XEnergy NZM2 3 200A - 50 kA 690V 750V - 105mm 184mm 149mm - -
RS Stock No. 849-4194
Mfr. Part No.LV429854
HK$3,568.20
Each
units
NSX Range LV4 4 100A - 90 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 849-3968
Mfr. Part No.LV429633
HK$2,726.64
Each
units
NSX Range LV4 3 100A - 85 kA 690V - - 161mm 105mm 86mm - -
RS Stock No. 628-8060
Mfr. Part No.259141 & PN1-100
BrandEaton
HK$1,810.95
1 Box of 1
Box(es)
- PN1 3 100A - 80 kA 690V - - 90mm 145mm 84.5mm - -
RS Stock No. 849-3952
Mfr. Part No.LV429630
HK$2,848.56
Each
units
NSX Range LV4 3 100A - 85 kA 690V - - 161mm 105mm 86mm - -
RS Stock No. 831-9181
Mfr. Part No.1SDA068208R1
BrandABB
HK$2,960.14
Each
units
Protecta XT1D 3 160A - 36 kA 690V 500V DIN Rail Mount 76.2mm 130mm 70mm - -
RS Stock No. 849-4015
Mfr. Part No.LV429650
HK$4,219.00
Each
units
NSX Range LV4 4 100A - 85 kA 690V - - 161mm 140mm 86mm - -
RS Stock No. 849-3983
Mfr. Part No.LV429637
HK$2,779.92
Each
units
NSX Range LV4 3 100A - 85 kA 690V - - 161mm 105mm 86mm - -
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