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. 849-4084
Mfr. Part No.LV429690
$642.65
Each
units
NSX Range LV4 4P 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7991
Mfr. Part No.LV426791
$1,621.12
Each
units
Compact NSXm 3 50 A 65 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7935
Mfr. Part No.LV426726
$1,843.05
Each
units
Compact NSXm 4 50 A 35 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-8128
Mfr. Part No.LV426213
$554.25
Each
units
Compact NSXm 4P 40 A 10 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8084
Mfr. Part No.LV426129
$1,073.62
Each
units
Compact NSXm 4P 160 A 10 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-7723
Mfr. Part No.LV426421
$686.09
Each
units
Compact NSXm 4 25 A 10 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-8134
Mfr. Part No.LV426219
$1,058.53
Each
units
Compact NSXm 4P 160 A 20 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4472
Mfr. Part No.LV431690
$1,584.16
Each
units
NSX Range LV4 4P 250 A 85 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7949
Mfr. Part No.LV426742
$1,633.38
Each
units
Compact NSXm 3 100 A 65 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7990
Mfr. Part No.LV426790
$1,621.12
Each
units
Compact NSXm 3 25 A 65 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-8083
Mfr. Part No.LV426128
$922.06
Each
units
Compact NSXm 4P 125 A 10 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4254
Mfr. Part No.LV430633
$530.72
Each
units
NSX Range LV4 3P 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 178-7743
Mfr. Part No.LV426459
$911.87
Each
units
Compact NSXm 3 160 A 50 kA 690 V - Screw 81mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 849-4080
Mfr. Part No.LV429687
$557.15
Each
units
NSX Range LV4 4P 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-8127
Mfr. Part No.LV426212
$554.25
Each
units
Compact NSXm 4P 32 A 10 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8133
Mfr. Part No.LV426218
$909.10
Each
units
Compact NSXm 4P 125 A 20 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4078
Mfr. Part No.LV429685
$557.15
Each
units
NSX Range LV4 4P 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7741
Mfr. Part No.LV426458
$707.98
Each
units
Compact NSXm 3 125 A 50 kA 690 V - Screw 81mm 137mm 80mm Distribution, Protection Time Delay MCCB
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Description:
The Acti9 Disbo series of MCBs by Schneider Electric provides excellent circuit protection particularly in combating short circuits and overload currents. These MCBs are rigorously tested by Schneider and are compliant with standards such as IEC/EN 60898 & 60947-2. These ...
The new 3VA1 molded case circuit breakers reliably ...
Description:
The new 3VA1 molded case circuit breakers reliably perform all the tasks associated with line protection.The devices of the 3VA1 series fulfill all standard tasks in line protection, thanks to their particularly compact design, 3VA1 MCCBs are the perfect choice ...
To be fitted directly to the NZM2 range ...
Description:
To be fitted directly to the NZM2 range of MCCBs.