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 Rated AC Voltage Rated DC Voltage Mounting Style Length Width Depth Application Break Time Circuit Breaker Type
RS Stock No. 849-4018
Mfr. Part No.LV429651
HK$3,401.73
Each
units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4015
Mfr. Part No.LV429650
HK$3,401.73
Each
units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 776-3348
Mfr. Part No.A9F90325
HK$3,094.00
Each
units
Acti 9 iC60L 3P 25 A 30 kA 440 V - DIN Rail Mount 54mm 78.5mm 85mm - - -
RS Stock No. 831-9185
Mfr. Part No.1SDA068210R1
BrandABB
HK$2,904.93
Each
units
Protecta XT3D 3P 250 A - 690 V 500V DIN Rail Mount 105mm 150mm 70mm - - -
RS Stock No. 849-4614
Mfr. Part No.LV432895
HK$15,373.70
Each
units
NSX Range LV4 3P 630 A 85 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 849-4012
Mfr. Part No.LV429652
HK$2,866.18
Each
units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-3952
Mfr. Part No.LV429630
HK$2,249.34
Each
units
NSX Range LV4 3P 100 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 538-3849
Mfr. Part No.E203/125RD
BrandABB
HK$740.00
Each
units
Pro M E200i 3P 125 A - 230 V, 400 V - DIN Rail 52.5mm 68mm 90mm - - -
RS Stock No. 178-7908
Mfr. Part No.LV426982
HK$351.60
Each
units
- - 3 - - - - Cable Mount - - - - - -
RS Stock No. 178-7917
Mfr. Part No.LV426705
HK$9,312.37
Each
units
Compact NSXm 4 25 A 10 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7909
Mfr. Part No.LV426983
HK$464.57
Each
units
- - 4 - - - - Cable Mount - - - - - -
RS Stock No. 178-7918
Mfr. Part No.LV426706
HK$9,312.37
Each
units
Compact NSXm 4 50 A 10 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-8088
Mfr. Part No.LV426153
HK$2,264.45
Each
units
Compact NSXm 3P 40 A 8 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-7919
Mfr. Part No.LV426707
HK$9,854.07
Each
units
Compact NSXm 4 100 A 10 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7910
Mfr. Part No.LV426984
HK$702.96
Each
units
- - 3 - - - - Cable Mount - - - - - -
RS Stock No. 179-9817
Mfr. Part No.LV510330
HK$628.85
Each
units
Easypact CVS100 → 250 Easypact CVS 3 100 A 36 kA 440 V - Fixed Mount 105mm 161mm 86mm Distribution Instantaneous MCCB
RS Stock No. 178-7987
Mfr. Part No.LV426786
HK$9,941.58
Each
units
Compact NSXm 4 50 A 50 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7928
Mfr. Part No.LV426717
HK$10,070.85
Each
units
Compact NSXm 4 100 A 20 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 179-9818
Mfr. Part No.LV510331
HK$628.85
Each
units
Easypact CVS100 → 250 Easypact CVS 3 100 A 36 kA 440 V - Fixed Mount 105mm 161mm 86mm Distribution Instantaneous MCCB
RS Stock No. 178-7988
Mfr. Part No.LV426787
HK$10,545.92
Each
units
Compact NSXm 4 100 A 50 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB