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 MCCBAlthough 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. 178-8248
Mfr. Part No.LV426413
$639.59
Each
units
Compact NSXm 4P 40 A 50 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4153
Mfr. Part No.LV429841
$579.60
Each
units
NSX Range LV4 3P 100 A 90 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 178-7731
Mfr. Part No.LV426429
$1,247.31
Each
units
Compact NSXm 4 160 A 50 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-7857
Mfr. Part No.LV426825
$231.01
Each
units
- - - - - 277 V - Clip-On 8mm - - - - -
RS Stock No. 178-8139
Mfr. Part No.LV426224
$598.03
Each
units
Compact NSXm 4P 50 A 25 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8154
Mfr. Part No.LV426259
$808.02
Each
units
Compact NSXm 3P 160 A 25 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-7828
Mfr. Part No.LV426577
$874.51
Each
units
Compact NSXm 4 100 A 70 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-7790
Mfr. Part No.LV426523
$755.47
Each
units
Compact NSXm 4 40 A 70 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-8111
Mfr. Part No.LV426176
$668.83
Each
units
Compact NSXm 4P 80 A 16 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4138
Mfr. Part No.LV429792
$966.69
Each
units
NSX Range LV4 3P 100 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 178-7957
Mfr. Part No.LV426751
$1,447.80
Each
units
Compact NSXm 3 50 A 16 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 178-7862
Mfr. Part No.LV426841
$147.52
Each
units
- - - - - 24 V 24V Clip-On 8mm - - - - -
RS Stock No. 178-7956
Mfr. Part No.LV426750
$1,447.80
Each
units
Compact NSXm 3 25 A 16 kA 690 V - Screw 108mm 144mm 80mm Distribution, Protection Time Delay ELCB
RS Stock No. 849-4147
Mfr. Part No.LV429805
$1,287.54
Each
units
NSX Range LV4 4P 100 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -
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