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. 537-5545
Mfr. Part No.259093 | NZMN2-A200
BrandEaton
TWD21,175.00
Each
units
XEnergy NZM2 3P 200 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 831-9188
Mfr. Part No.1SDA068059R1
BrandABB
TWD24,563.00
Each
units
Protecta XT3N 3 250 A 36 kA 690 V 500V DIN Rail Mount 105mm 150mm 70mm - - -
RS Stock No. 454-8130
Mfr. Part No.259085 | NZMN1-A100
BrandEaton
TWD13,143.00
Each
units
XEnergy NZM1 3P 100 A 50 kA 690 V 750V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 628-8105
Mfr. Part No.266007 | PN2-250
BrandEaton
TWD15,898.00
1 Box of 1
Box(es)
- PN2 3P 250 A 80 kA 690 V - Fixed 105mm 184mm 149mm - - -
RS Stock No. 628-8048
Mfr. Part No.259140 | PN1-63
BrandEaton
TWD6,218.00
1 Box of 1
Box(es)
- PN1 3P 63 A 80 kA 690 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 454-8045
Mfr. Part No.259076 | NZMB1-A50
BrandEaton
TWD10,167.00
Each
units
XEnergy NZM1 3P 50 A 25 kA 440 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 874-4234
Mfr. Part No.3VA1120-4ED36-0AA0
BrandSiemens
TWD7,612.00
Each
units
Sentron 3VA 3 20 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 849-4087
Mfr. Part No.LV429686
TWD15,948.00
Each
units
NSX Range LV4 4 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 454-8118
Mfr. Part No.259083 | NZMN1-A63
BrandEaton
TWD12,172.00
Each
units
XEnergy NZM1 3P 63 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 628-8032
Mfr. Part No.259092 | NZMN2-A160
BrandEaton
TWD17,533.00
1 Box of 1
Box(es)
XEnergy NZM2 3P 160 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 776-3348
Mfr. Part No.A9F90325
TWD13,946.00
Each
units
Acti 9 iC60L 3P 25 A 30 kA 440 V - DIN Rail Mount 54mm 78.5mm 85mm - - -
RS Stock No. 874-4240
Mfr. Part No.3VA1125-3ED36-0AA0
BrandSiemens
TWD6,742.00
Each
units
Sentron 3VA 3 25 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4278
Mfr. Part No.3VA1196-3ED36-0AA0
BrandSiemens
TWD6,742.00
Each
units
Sentron 3VA 3 16 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 628-8060
Mfr. Part No.259141 | PN1-100
BrandEaton
TWD7,403.00
1 Box of 1
Box(es)
- PN1 3P 100 A 80 kA 690 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4380
Mfr. Part No.LV430853
TWD22,363.00
Each
units
NSX Range LV4 4 160 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 454-8089
Mfr. Part No.259080 | NZMB1-A125
BrandEaton
TWD11,329.00
Each
units
XEnergy NZM1 3P 125 A 25 kA 440 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4270
Mfr. Part No.LV430652
TWD23,040.00
Each
units
NSX Range LV4 4 160 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-8067
Mfr. Part No.LV426112
TWD11,204.00
Each
units
Compact NSXm 4 32 A 16 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 179-9750
Mfr. Part No.EZD400M3400K
TWD11,472.00
Each
units
EZD EZD400M 3 400 A 50 kA 440 V - Fixed Mount 140mm 255mm 110mm Distribution Instantaneous MCCB
RS Stock No. 849-4251
Mfr. Part No.LV430632
TWD14,728.00
Each
units
NSX Range LV4 3 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -