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. 776-3348
Mfr. Part No.A9F90325
TWD13,881.00
Each
units
Acti 9 iC60L 3P 25 A 30 kA 440 V - DIN Rail Mount 54mm 78.5mm 85mm - - -
RS Stock No. 849-4087
Mfr. Part No.LV429686
TWD15,874.00
Each
units
NSX Range LV4 4 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7874
Mfr. Part No.LV426906
TWD1,042.00
Each
units
- - - - - - - Fixed Mount - - - - - -
RS Stock No. 178-7875
Mfr. Part No.LV426912
TWD716.00
Each
units
- - 3 16 → 160 A - - - - - - - - - -
RS Stock No. 178-7999
Mfr. Part No.LV426900
TWD8,004.00
Each
units
- - - - - - - - 8mm - - - - -
RS Stock No. 178-7876
Mfr. Part No.LV426913
TWD956.00
Each
units
- - 4 16 → 160 A - - - - - - - - - -
RS Stock No. 178-8000
Mfr. Part No.LV426850
TWD3,193.00
Each
units
- - - - - - 12V Clip-On 8mm - - - - -
RS Stock No. 178-8055
Mfr. Part No.LV426100
TWD9,218.00
Each
units
Compact NSXm 3 16 A 16 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-7885
Mfr. Part No.LV426935
TWD4,497.00
Each
units
- - - - - - - Side Mount - - - - - -
RS Stock No. 178-7877
Mfr. Part No.LV426920
TWD705.00
Each
units
- - - 16 → 160 A - - - - - - - - - -
RS Stock No. 179-9844
Mfr. Part No.LV510571
TWD8,112.00
Each
units
Easypact CVS100 → 250 Easypact CVS 4 100 A 36 kA 440 V - Fixed Mount 140mm 236mm 86mm Distribution Instantaneous MCCB
RS Stock No. 178-7789
Mfr. Part No.LV426522
TWD16,144.00
Each
units
Compact NSXm 4 32 A 70 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 849-4103
Mfr. Part No.LV429695
TWD16,908.00
Each
units
NSX Range LV4 4 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7769
Mfr. Part No.LV426504
TWD14,401.00
Each
units
Compact NSXm 3 50 A 70 kA 690 V - Screw 81mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-8159
Mfr. Part No.LV426264
TWD13,082.00
Each
units
Compact NSXm 4 50 A 25 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8060
Mfr. Part No.LV426105
TWD9,218.00
Each
units
Compact NSXm 3 63 A 16 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4179
Mfr. Part No.LV429850
TWD16,773.00
Each
units
NSX Range LV4 4 100 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 178-7729
Mfr. Part No.LV426427
TWD19,003.00
Each
units
Compact NSXm 4 100 A 50 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-8178
Mfr. Part No.LV426303
TWD11,501.00
Each
units
Compact NSXm 3 40 A 36 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 849-4380
Mfr. Part No.LV430853
TWD22,258.00
Each
units
NSX Range LV4 4 160 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -