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. 806-7420
Mfr. Part No.SEA9NCB1004
HK$20.486
Each
units
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RS Stock No. 806-7424
Mfr. Part No.SEA9NCB1604
HK$9.167
Each
units
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RS Stock No. 874-4402
Mfr. Part No.3VA2225-5HL32-0AA0
BrandSiemens
SGD2,045.99
Each
units
Sentron 3VA 3 250A 55 kA 690V - - 105mm 181mm 107mm Instantaneous MCCB 4.5mm
RS Stock No. 454-8073
Mfr. Part No.259079 & NZMB1-A100
BrandEaton
SGD398.43
Each
units
XEnergy NZM1 3 100A 25 kA 440V - - 90mm 145mm 84.5mm - - -
RS Stock No. 806-7436
Mfr. Part No.SEA9NCB2504
SGD1,035.78
Each
units
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RS Stock No. 454-8067
Mfr. Part No.259078 & NZMB1-A80
BrandEaton
SGD413.27
Each
units
XEnergy NZM1 3 80A 25 kA 440V - - 90mm 145mm 84.5mm - - -
RS Stock No. 806-7433
Mfr. Part No.SEA9NCB2004
SGD1,328.13
Each
units
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RS Stock No. 849-4248
Mfr. Part No.LV430630
SGD870.50
Each
units
NSX Range LV4 3 160A 85 kA 690V - - 161mm 105mm 86mm - - -
RS Stock No. 849-3936
Mfr. Part No.LV429621
SGD465.76
Each
units
NSX Range LV4 3 100A 85 kA 690V - - 161mm 105mm 86mm - - -
RS Stock No. 454-8051
Mfr. Part No.259077 & NZMB1-A63
BrandEaton
SGD292.68
Each
units
XEnergy NZM1 3 63A 25 kA 440V - - 90mm 145mm 84.5mm - - -
RS Stock No. 849-4620
Mfr. Part No.LV432976
SGD4,293.54
Each
units
NSX Range LV4 3P - - - - - 255mm 140mm 110mm - - -
RS Stock No. 537-5551
Mfr. Part No.259094 & NZMN2-A250
BrandEaton
SGD1,164.08
Each
units
XEnergy NZM2 3 250A 50 kA 690V 750V - 105mm 184mm 149mm - - -
RS Stock No. 517-4819
Mfr. Part No.MGP0631L1
SGD161.12
Each
units
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RS Stock No. 454-8045
Mfr. Part No.259076 & NZMB1-A50
BrandEaton
SGD473.63
Each
units
XEnergy NZM1 3 50A 25 kA 440V - - 90mm 145mm 84.5mm - - -
RS Stock No. 454-8118
Mfr. Part No.259083 & NZMN1-A63
BrandEaton
SGD567.09
Each
units
XEnergy NZM1 3 63A 50 kA 690V 500V - 90mm 145mm 84.5mm - - -
RS Stock No. 831-9169
Mfr. Part No.1SDA067411R1
BrandABB
SGD400.47
Each
units
Protecta XT1N 3 32A 36 kA 690V 500V DIN Rail Mount 76.2mm 130mm 70mm - - -
RS Stock No. 849-4602
Mfr. Part No.LV432893
SGD2,981.68
Each
units
NSX Range LV4 3 630A 85 kA 690V - - 255mm 140mm 110mm - - -
RS Stock No. 874-4360
Mfr. Part No.3VA1196-3EF36-0AA0
BrandSiemens
SGD558.99
Each
units
Sentron 3VA 3 16A 25 kA 690V 500V - 76.2mm 130mm 88mm Instantaneous MCCB 4.2mm
RS Stock No. 849-3964
Mfr. Part No.LV429632
SGD494.24
Each
units
NSX Range LV4 3 100A 85 kA 690V - - 161mm 105mm 86mm - - -
RS Stock No. 849-4400
Mfr. Part No.LV431623
SGD746.44
Each
units
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