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. 874-4174
Mfr. Part No.3VA1112-3EE36-0AA0
BrandSiemens
HK$3,453.05
Each
units
Sentron 3VA 3 125 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4159
Mfr. Part No.3VA1110-4EF36-0AA0
BrandSiemens
HK$2,311.45
Each
units
Sentron 3VA 3 100 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4278
Mfr. Part No.3VA1196-3ED36-0AA0
BrandSiemens
HK$1,715.20
Each
units
Sentron 3VA 3 16 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4177
Mfr. Part No.3VA1112-3EF36-0AA0
BrandSiemens
HK$3,752.70
Each
units
Sentron 3VA 3 125 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4402
Mfr. Part No.3VA2225-5HL32-0AA0
BrandSiemens
HK$10,048.24
Each
units
Sentron 3VA 3 250 A 55 kA 690 V - Fixed 105mm 181mm 107mm Commercial Buildings Instantaneous MCCB
RS Stock No. 874-4250
Mfr. Part No.3VA1132-3ED36-0AA0
BrandSiemens
HK$1,715.20
Each
units
Sentron 3VA 3 32 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4262
Mfr. Part No.3VA1132-3EF36-0AA0
BrandSiemens
HK$1,965.85
Each
units
Sentron 3VA 3 32 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4206
Mfr. Part No.3VA1116-3EF36-0AA0
BrandSiemens
HK$3,937.42
Each
units
Sentron 3VA 3 160 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4376
Mfr. Part No.3VA2110-5HL32-0AA0
BrandSiemens
HK$3,582.44
Each
units
Sentron 3VA 3 100 A 55 kA 690 V - Fixed 105mm 181mm 107mm Commercial Buildings Instantaneous MCCB
RS Stock No. 874-4313
Mfr. Part No.3VA1150-4ED36-0AA0
BrandSiemens
HK$1,766.56
Each
units
Sentron 3VA 3 50 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4180
Mfr. Part No.3VA1112-4EF36-0AA0
BrandSiemens
HK$4,035.23
Each
units
Sentron 3VA 3 125 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4212
Mfr. Part No.3VA1116-4EF36-0AA0
BrandSiemens
HK$6,939.28
Each
units
Sentron 3VA 3 160 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
HK$1,715.20
Each
units
Sentron 3VA 3 40 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4247
Mfr. Part No.3VA1120-4EF36-0AA0
BrandSiemens
HK$1,939.77
Each
units
Sentron 3VA 3 20 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4367
Mfr. Part No.3VA1196-4EF36-0AA0
BrandSiemens
HK$2,096.95
Each
units
Sentron 3VA 3 16 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4379
Mfr. Part No.3VA2110-5HL36-0AA0
BrandSiemens
HK$3,823.48
Each
units
Sentron 3VA 3 100 A 55 kA 690 V - Fixed 105mm 181mm 107mm Commercial Buildings Instantaneous MCCB
RS Stock No. 874-4317
Mfr. Part No.3VA1150-4EE36-0AA0
BrandSiemens
HK$1,911.74
Each
units
Sentron 3VA 3 50 A 36 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4351
Mfr. Part No.3VA1196-3EE36-0AA0
BrandSiemens
HK$1,805.92
Each
units
Sentron 3VA 3 16 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4193
Mfr. Part No.3VA1116-3ED36-0AA0
BrandSiemens
HK$3,770.85
Each
units
Sentron 3VA 3 160 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB
RS Stock No. 874-4183
Mfr. Part No.3VA1120-3EE36-0AA0
BrandSiemens
HK$1,805.92
Each
units
Sentron 3VA 3 20 A 25 kA 690 V 500V Fixed 76.2mm 130mm 88mm General Purpose, Residential Instantaneous MCCB