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. 628-8076
Mfr. Part No.PN2-160
BrandEaton
£230.04
1 Box of 1
Box(es)
- PN2 3P 160 A 80 kA 690 V - Fixed 105mm 184mm 149mm - - -
RS Stock No. 628-8048
Mfr. Part No.PN1-63
BrandEaton
£132.95
1 Box of 1
Box(es)
- PN1 3P 63 A 80 kA 690 V - Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 742-2176
Mfr. Part No.LV432895
£1,634.00
Each
Units
NSX Range LV 3P 630 A 20 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 849-4614
Mfr. Part No.LV432895
£1,634.00
Each
Units
NSX Range LV4 3P 630 A 85 kA 690 V - Fixed 255mm 140mm 110mm - - -
RS Stock No. 849-4598
Mfr. Part No.LV432694
£1,163.00
Each
Units
NSX Range LV4 4P 400 A 50 kA 690 V - Fixed 255mm 185mm 110mm - - -
RS Stock No. 537-5573
Mfr. Part No.NZMN2-VE160
BrandEaton
£407.53
Each
Units
xEnergy NZM2 3P 160 A 50 kA 690 V 750V Fixed 105mm 184mm 149mm - - -
RS Stock No. 454-8146
Mfr. Part No.NZMN1-A125
BrandEaton
£416.10
Each
Units
xEnergy NZM1 3P 125 A 50 kA 690 V 750V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 454-8095
Mfr. Part No.NZMN1-A40
BrandEaton
£260.29
Each
Units
xEnergy NZM1 3P 40 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4015
Mfr. Part No.LV429650
£376.00
Each
Units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4532
Mfr. Part No.LV431830
£660.00
Each
Units
NSX Range LV4 3P 250 A 90 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 874-4382
Mfr. Part No.3VA2116-5HL32-0AA0
BrandSiemens
£479.93
Each
Units
Sentron 3VA 3P 160 A 55 kA 690 V - Fixed 105mm 181mm 107mm Commercial Buildings Instantaneous MCCB
RS Stock No. 454-8124
Mfr. Part No.NZMN1-A80
BrandEaton
£265.83
Each
Units
xEnergy NZM1 3P 80 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 628-7994
Mfr. Part No.NZMN1-M80
BrandEaton
£221.87
1 Box of 1
Box(es)
xEnergy NZM1 3P 80 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4620
Mfr. Part No.LV432976
£2,111.00
Each
Units
NSX Range LV4 3P - 85 kA - - - 255mm 140mm 110mm - - -
RS Stock No. 849-4239
Mfr. Part No.LV430620
£174.61
Each
Units
NSX Range LV4 3P 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-3986
Mfr. Part No.LV429640
£349.00
Each
Units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4422
Mfr. Part No.LV431641
£710.00
Each
Units
NSX Range LV4 4P 250 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 125-1403
Mfr. Part No.SEA9NCB2504SM
£502.00
Each
Units
Acti 9 SEA9 4P 250 A - - - - - - - - - MCCB
RS Stock No. 731-9540
Mfr. Part No.4 067 72
BrandLegrand
£25.89
Each
Units
- DNX3 1P 6 A 4.5 kA 230 V - DIN Rail - - - - - -
RS Stock No. 849-4428
Mfr. Part No.LV431640
£809.00
Each
Units
NSX Range LV4 4P 250 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
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