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. 849-4087
Mfr. Part No.LV429686
$612.87
Each
units
NSX Range LV4 4P 100 A 100 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 849-4598
Mfr. Part No.LV432694
$2,098.08
Each
units
NSX Range LV4 4P 400 A 50 kA 690 V - Fixed 255mm 185mm 110mm - - -
RS Stock No. 849-4434
Mfr. Part No.LV431643
$1,083.65
Each
units
NSX Range LV4 4P 250 A - - - - - - - - - -
RS Stock No. 538-3849
Mfr. Part No.E203/125RD
BrandABB
$145.42
Each
units
Pro M E200i 3P 125 A - 230 V, 400 V - DIN Rail 52.5mm 68mm 90mm - - -
RS Stock No. 831-9172
Mfr. Part No.1SDA067416R1
BrandABB
$387.08
Each
units
Protecta XT1N 3P 100 A 36 kA 690 V 500V DIN Rail Mount 76.2mm 130mm 70mm - - -
RS Stock No. 831-9163
Mfr. Part No.1SDA067414R1
BrandABB
$389.00
Each
units
Protecta XT1N 3P 63 A 36 kA 690 V 500V DIN Rail Mount 76.2mm 130mm 70mm - - -
RS Stock No. 849-4361
Mfr. Part No.LV430842
$630.33
Each
units
NSX Range LV4 3P 160 A 90 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4242
Mfr. Part No.LV430631
$583.79
Each
units
NSX Range LV4 3P 160 A 85 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4282
Mfr. Part No.LV430670
$795.77
Each
units
NSX Range LV4 3P 160 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 849-4223
Mfr. Part No.LV429865
$526.88
Each
units
NSX Range LV4 4P 100 A 90 kA 690 V - Fixed 161mm 140mm 86mm - - -
RS Stock No. 831-9188
Mfr. Part No.1SDA068059R1
BrandABB
$1,068.49
Each
units
Protecta XT3N 3P 250 A 36 kA 690 V 500V DIN Rail Mount 105mm 150mm 70mm - - -
RS Stock No. 178-8157
Mfr. Part No.LV426262
$609.67
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. 178-8242
Mfr. Part No.LV426407
$619.53
Each
units
Compact NSXm 3P 100 A 50 kA 690 V - DIN Rail Mount, Fixed Mount 81mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8158
Mfr. Part No.LV426263
$609.67
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. 849-4343
Mfr. Part No.LV430791
$993.87
Each
units
NSX Range LV4 3P 160 A 100 kA 690 V - Fixed 161mm 105mm 86mm - - -
RS Stock No. 179-9837
Mfr. Part No.LV510473
$118.74
Each
units
Easypact CVS100 → 250 Easypact CVS 3 100 A 40 kA 440 V - Fixed Mount 105mm 161mm 86mm Distribution Instantaneous MCCB
RS Stock No. 178-7876
Mfr. Part No.LV426913
$49.26
Each
units
- - 4 16 → 160 A - - - - - - - - - -
RS Stock No. 178-7751
Mfr. Part No.LV426467
$824.85
Each
units
Compact NSXm 4 100 A 50 kA 690 V - Screw 108mm 137mm 80mm Distribution, Protection Time Delay MCCB
RS Stock No. 178-8142
Mfr. Part No.LV426227
$782.70
Each
units
Compact NSXm 4P 100 A 20 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
RS Stock No. 178-8167
Mfr. Part No.LV426272
$657.83
Each
units
Compact NSXm 4P 32 A 10 kA 690 V - DIN Rail Mount, Fixed Mount 108mm 80mm 137mm Distribution Protection Time Delay MCCB
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