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 at Maximum Voltage Rating Rated AC Voltage Rated DC Voltage Mounting Style Length Width Depth Break Time Circuit Breaker Type Mounting Hole Diameter
RS Stock No. 179-9744
Mfr. Part No.EZD250M3250N
HK$988.08
Each
units
EZD EZD250M 3 250A 10 kA 500V - - 105mm 165mm 60mm Instantaneous MCCB -
RS Stock No. 849-4037
Mfr. Part No.LV429656
HK$3,840.38
Each
units
NSX Range LV4 4 100A 85 kA 690V - - 161mm 140mm 86mm - - -
RS Stock No. 178-7804
Mfr. Part No.LV426556
HK$3,013.74
Each
units
Compact NSXm 3 80A 70 kA 690V - - 81mm 137mm 80mm Time Delay MCCB -
New
RS Stock No. 211-5971
Mfr. Part No.3VA1110-4EF46-0AA0
BrandSiemens
HK$5,586.33
Each
units
0AA0 3VA11 4 100A - - - Fixed - - - - - -
RS Stock No. 849-4618
Mfr. Part No.LV432896
HK$22,981.69
Each
units
NSX Range LV4 4 630A 85 kA 690V - - 255mm 185mm 110mm - - -
RS Stock No. 178-8219
Mfr. Part No.LV426364
HK$2,091.13
Each
units
Compact NSXm 4 50A 36 kA 690V - - 108mm 80mm 137mm Time Delay MCCB 4.5mm
New
RS Stock No. 212-0265
Mfr. Part No.LV433244
HK$5,403.42
Each
units
Compact NSX R 3 50A - - - Fixed - - - - - -
New
RS Stock No. 209-6921
Mfr. Part No.3VA2125-5KP32-0AA0
BrandSiemens
HK$12,998.96
Each
units
SENTRON 3VA2 3 25A - - - - - - - - - -
New
RS Stock No. 209-5231
Mfr. Part No.3VA2440-6HN42-0AA0
BrandSiemens
HK$32,902.65
Each
units
Sentron 3VA 4 400A - - - Fixed - - - - - -
New
RS Stock No. 211-6068
Mfr. Part No.3VA2163-5HN46-0AA0
BrandSiemens
HK$8,787.73
Each
units
0AA0 3VA20 4 63A - - - Fixed - - - - - -
New
RS Stock No. 211-6046
Mfr. Part No.3VA2010-5HN46-0AA0
BrandSiemens
HK$9,518.25
Each
units
0AA0 3VA20 4 100A - - - Fixed - - - - - -
New
RS Stock No. 209-6978
Mfr. Part No.3VA1116-6ED42-0AA0
BrandSiemens
HK$9,077.79
Each
units
Sentron 3VA1 4 160A - - - - - - - - - -
RS Stock No. 849-4422
Mfr. Part No.LV431641
HK$8,601.48
Each
units
NSX Range LV4 4 250A 85 kA 690V - - 161mm 140mm 86mm - - -
RS Stock No. 178-7912
Mfr. Part No.LV426700
HK$5,120.06
Each
units
Compact NSXm 3 25A 16 kA 690V - - 108mm 144mm 80mm Time Delay - -
New
RS Stock No. 210-1680
Mfr. Part No.3VA1180-5EF46-0AA0
BrandSiemens
HK$5,425.19
Each
units
SENTRON 3VA1 4 80A - - - - - - - - - -
RS Stock No. 179-9745
Mfr. Part No.EZD400E3250K
HK$2,717.70
Each
units
EZD EZD400E 3 250A 36 kA 440V - - 140mm 255mm 110mm Instantaneous MCCB -
RS Stock No. 179-9856
Mfr. Part No.LV516302
HK$734.15
Each
units
Easypact CVS-CVS160B Easypact CVS 3 160A 20 kA 440V - - 105mm 161mm 86mm Instantaneous MCCB -
New
RS Stock No. 210-1689
Mfr. Part No.3VA1196-6EF46-0AA0
BrandSiemens
HK$5,264.04
Each
units
SENTRON 3VA1 4 16A - - - - - - - - - -
RS Stock No. 178-8245
Mfr. Part No.LV426410
HK$2,262.31
Each
units
Compact NSXm 4 16A 50 kA 690V - - 108mm 80mm 137mm Time Delay MCCB 4.5mm
RS Stock No. 179-9831
Mfr. Part No.LV510452
HK$799.57
Each
units
Easypact CVS100 → 250 Easypact CVS 3 100A 40 kA 440V - - 105mm 161mm 86mm Instantaneous MCCB -