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. 742-2154
Mfr. Part No.LV432693
£914.00
Each
Units
NSX Range LV 3 400 A 10 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 742-2157
Mfr. Part No.LV432893
£1,466.00
Each
Units
NSX Range LV 3 630 A 10 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 849-4602
Mfr. Part No.LV432893
£1,466.00
Each
Units
NSX Range LV4 3 630 A 85 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 831-9172
Mfr. Part No.1SDA067416R1
BrandABB
£202.23
Each
Units
Protecta XT1N 3 100 A 36 kA 690 V 500V DIN Rail Mount 76.2mm 130mm 70mm - - -
RS Stock No. 831-9188
Mfr. Part No.1SDA068059R1
BrandABB
£546.24
Each
Units
Protecta XT3N 3 250 A 36 kA 690 V 500V DIN Rail Mount 105mm 150mm 70mm - - -
RS Stock No. 454-8051
Mfr. Part No.NZMB1-A63
BrandEaton
£187.88
Each
Units
xEnergy NZM1 3 63 A 25 kA 440 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 537-5545
Mfr. Part No.NZMN2-A200
BrandEaton
£485.03
Each
Units
xEnergy NZM2 3 200 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 537-5551
Mfr. Part No.NZMN2-A250
BrandEaton
£572.34
Each
Units
xEnergy NZM2 3 250 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 849-4412
Mfr. Part No.LV431631
£484.00
Each
Units
NSX Range LV4 3 250 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 628-8004
Mfr. Part No.NZMN2-M125
BrandEaton
£399.68
1 Box of 1
Box(es)
xEnergy NZM2 3 125 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 849-4242
Mfr. Part No.LV430631
£326.00
Each
Units
NSX Range LV4 3 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 628-8032
Mfr. Part No.NZMN2-A160
BrandEaton
£401.62
1 Box of 1
Box(es)
xEnergy NZM2 3 160 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 849-3952
Mfr. Part No.LV429630
£249.00
Each
Units
NSX Range LV4 3 100 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 831-9163
Mfr. Part No.1SDA067414R1
BrandABB
£196.90
Each
Units
Protecta XT1N 3 63 A 36 kA 690 V 500V DIN Rail Mount 76.2mm 130mm 70mm - - -
RS Stock No. 454-8073
Mfr. Part No.NZMB1-A100
BrandEaton
£187.88
Each
Units
xEnergy NZM1 3 100 A 25 kA 440 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 454-8089
Mfr. Part No.NZMB1-A125
BrandEaton
£259.50
Each
Units
xEnergy NZM1 3 125 A 25 kA 440 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 454-8118
Mfr. Part No.NZMN1-A63
BrandEaton
£278.82
Each
Units
xEnergy NZM1 3 63 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 628-7988
Mfr. Part No.NZMN1-M63
BrandEaton
£221.19
1 Box of 1
Box(es)
xEnergy NZM1 3 63 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4419
Mfr. Part No.LV431630
£581.00
Each
Units
NSX Range LV4 3 250 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 517-4819
Mfr. Part No.MGP0631L1
£137.00
Each
Units
Powerpact4 MGP 1 63 A 25 kA 230 V - Surface Mount - - - - - -
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