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. 874-4219
Mfr. Part No.3VA1116-4EE36-0AA0
BrandSiemens
$910.24
Each
units
Sentron 3VA 3P 160 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 849-4015
Mfr. Part No.LV429650
$624.53
Each
units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4504
Mfr. Part No.LV431780
$1,664.58
Each
units
NSX Range LV4 4P 250 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4453
Mfr. Part No.LV431670
$1,117.68
Each
units
NSX Range LV4 3P 250 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 874-4200
Mfr. Part No.3VA1116-4ED36-0AA0
BrandSiemens
$841.01
Each
units
Sentron 3VA 3P 160 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4284
Mfr. Part No.3VA1140-3ED36-0AA0
BrandSiemens
$359.39
Each
units
Sentron 3VA 3P 40 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 849-4012
Mfr. Part No.LV429652
$444.81
Each
units
NSX Range LV4 4P 100 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4431
Mfr. Part No.LV431642
$1,112.42
Each
units
NSX Range LV4 4P 250 A - - - - - - - - - -
RS Stock No. 849-4059
Mfr. Part No.LV429675
$497.60
Each
units
NSX Range LV4 3P 100 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4618
Mfr. Part No.LV432896
$3,113.64
Each
units
NSX Range LV4 4P 630 A 85 kA 690 V - Fixed 255mm 185mm 110mm - - -
RS Stock No. 849-4251
Mfr. Part No.LV430632
$530.72
Each
units
NSX Range LV4 3P 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4422
Mfr. Part No.LV431641
$1,101.45
Each
units
NSX Range LV4 4P 250 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4052
Mfr. Part No.LV429676
$497.60
Each
units
NSX Range LV4 3P 100 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4223
Mfr. Part No.LV429865
$478.98
Each
units
NSX Range LV4 4P 100 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4517
Mfr. Part No.LV431792
$1,074.45
Each
units
NSX Range LV4 3P 250 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4605
Mfr. Part No.LV432749
$1,967.03
Each
units
NSX Range LV4 3P - 85 kA - - - 255mm 140mm 110mm - - -
RS Stock No. 849-4579
Mfr. Part No.LV431872
$948.53
Each
units
NSX Range LV4 3P 250 A 90 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 454-8118
Mfr. Part No.NZMN1-A63
BrandEaton
$423.94
Each
units
xEnergy NZM1 3P 63 A 50 kA 690 V 500V Fixed 90mm 145mm 84.5mm - - -
RS Stock No. 849-4406
Mfr. Part No.LV431622
$646.63
Each
units
NSX Range LV4 3P 250 A - - - - - - - - - -
RS Stock No. 849-4129
Mfr. Part No.LV429790
$655.56
Each
units
NSX Range LV4 3P 100 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
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Description:
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Description:
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To be fitted directly to the NZM2 range ...
Description:
To be fitted directly to the NZM2 range of MCCBs.