MCBs

MCBs, or miniature circuit breakers, are a type of switch used to automatically turn off electrical circuits during abnormal conditions. MCBs often replace fuses in low voltage electrical circuits as they can be more reliable, much more sensitive and are resettable.


How an MCB Works


When continuous overcurrent flows through an MCB, a bimetallic strip is heated and causes it to bend. This bending of the bimetallic strip releases a mechanical latch opening the contacts and turning off the MCB, thereby stopping the current to flow in the circuit. To restart the flow of current the MCB must be manually turned on. This mechanism protects the MCB from faults arising due to overcurrent or overload and is intended to prevent the accidental overloading of the cable in a no-fault situation. The speed of the MCB tripping will vary with the degree of the overload. This is usually achieved by the use of a thermal device in the MCB. The second characteristic is the magnetic fault protection, which is intended to operate when the fault reaches a predetermined level and to trip the MCB within one-tenth of a second. The level of this magnetic trip gives the MCB its type characteristic.


MCBs are used to perform many functions such as local control switches, isolating switches against faults and overload protection devices for installation or specific equipment or appliances.


MCB Types


MCBs have three common types for circuit protection in residential, commercial and industrial applications. The use is classified by a type, which determines the tripping characteristics of the MCB:


Type B - trips between 3 and 5 times the load current


This type will trip instantly at a rate of three to five times its rated current. These are normally used for resistive or small inductive loads where switching surges are very small. Therefore, these are suitable for residential or light commercial installations.


Type C - trips between 5 and 10 times the full load current


This type will trip instantly at a rate of five to ten times its rated current. These are normally used for high inductive loads where switching surges are high such as small motors and fluorescent lighting. In such cases, type C MCBs are preferred to handle higher value of short circuit currents. Therefore, these are suitable for highly inductive commercial and industrial installations.


Type D - trips between 10 and 20 times the full load current


This type will trip instantly at a rate of ten to twenty-five times its rated current. These are normally used for very high inductive loads where high inrush current is very frequent. These are suitable for specific industrial and commercial applications. The common examples of such applications include x-ray machines, UPS systems, industrial welding equipment, large winding motors, etc.


How to select a suitable MCB for the application?


Focus on 3 main points to choose the right MCB for the electrical circuit


  1. Ampere rating

  2. Short circuit breaking capacity

  3. Application type
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Rincian Komponen Brand Stock Model Number Range Series Series Number of Poles Current Rating Tripping Characteristics Rated AC Voltage Rated DC Voltage Mounting Style Breaking Capacity Length Width Depth Application Special Features Tripping Mechanism Terminal Contact Type Reset Actuator Type
GV5P150F 3P 36kA Motor CB Schneider Electric 0 TeSys GV5 TeSys GV5P GV5P 3 150 A - 690 V - DIN Rail 36 kA 105mm 155mm 161mm Motor Protection - Thermal-Magnetic Screw -
GV5P150H 3P 70kA Motor CB Schneider Electric 0 TeSys GV5 TeSys GV5P GV5P 3 150 A - 690 V - DIN Rail 70 kA 105mm 155mm 161mm Motor Protection - Thermal-Magnetic Screw -
GV5P220F 3P 36kA Motor CB Schneider Electric 0 TeSys GV5 TeSys GV5P GV5P 3 220 A - 690 V - DIN Rail 36 kA 105mm 155mm 161mm Motor Protection - Thermal-Magnetic Screw -
GV5P220H 3P 70kA Motor CB Schneider Electric 0 TeSys GV5 TeSys GV5P GV5P 3 220 A - 690 V - DIN Rail 70 kA 105mm 155mm 161mm Motor Protection - Thermal-Magnetic Screw -
GV6P320F 3P 36kA Motor CB Schneider Electric 0 TeSys GV6 TeSys GV6P GV6P 3 320 A - 690 V - DIN Rail 36 kA 140mm 179mm 255mm Motor Protection - Thermal-Magnetic Screw -
GV6P320H 3P 70kA Motor CB Schneider Electric 0 TeSys GV6 TeSys GV6P GV6P 3 320 A - 690 V - DIN Rail 70 kA 140mm 179mm 255mm Motor Protection - Thermal-Magnetic Screw -
GV6P500F 3P 36kA Motor CB Schneider Electric 0 TeSys GV6 TeSys GV6P GV6P 3 500 A - 690 V - DIN Rail 36 kA 140mm 179mm 255mm Motor Protection - Thermal-Magnetic Screw -
GV6P500H 3P 70kA Motor CB Schneider Electric 0 TeSys GV6 TeSys GV6P GV6P 3 500 A - 690 V - DIN Rail 70 kA 140mm 179mm 255mm Motor Protection - Thermal-Magnetic Screw -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3479
  • Merek ABB
  • Pbrk. No. Komp. 470438
ABB 0 SN201S L C16-L - SN201 SN201 1 + N 16 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3476
  • Merek ABB
  • Pbrk. No. Komp. 470429
ABB 0 SN201S L C2-L - SN201 SN201 1 + N 2 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3477
  • Merek ABB
  • Pbrk. No. Komp. 470433
ABB 0 SN201S L C6-L - SN201 SN201 1 + N 6 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3478
  • Merek ABB
  • Pbrk. No. Komp. 470436
ABB 0 SN201S L C10-L - SN201 SN201 1 + N 10 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3480
  • Merek ABB
  • Pbrk. No. Komp. 470439
ABB 0 SN201S L C20-L - SN201 SN201 1 + N 20 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N fast connectio
  • No. Stok RS 186-3481
  • Merek ABB
  • Pbrk. No. Komp. 470441
ABB 0 SN201S L C32-L - SN201 SN201 1 + N 32 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N curve D raccord
  • No. Stok RS 186-3485
  • Merek ABB
  • Pbrk. No. Komp. 470661
ABB 0 SN201 D10-L - SN201 SN201 1 + N 10 A Type D 230 V - DIN Rail 6 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N curve D raccord
  • No. Stok RS 186-3490
  • Merek ABB
  • Pbrk. No. Komp. 470664
ABB 0 SN201 D20-L - SN201 SN201 1 + N 20 A Type D 230 V - DIN Rail 6 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N curve D raccord
  • No. Stok RS 186-3488
  • Merek ABB
  • Pbrk. No. Komp. 470663
ABB 0 SN201 D16-L - SN201 SN201 1 + N 16 A Type D 230 V - DIN Rail 6 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N raccordement sc
  • No. Stok RS 186-3468
  • Merek ABB
  • Pbrk. No. Komp. 470232
ABB 0 SN201 L C4-L - SN201 SN201 1 + N 4 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N raccordement sc
  • No. Stok RS 186-3472
  • Merek ABB
  • Pbrk. No. Komp. 470239
ABB 0 SN201 L C20-L - SN201 SN201 1 + N 20 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
Mini circuit breakerPh+N raccordement sc
  • No. Stok RS 186-3471
  • Merek ABB
  • Pbrk. No. Komp. 470236
ABB 0 SN201 L C10-L - SN201 SN201 1 + N 10 A Type C 230 V - DIN Rail 4.5 kA 69mm 18mm 85mm Final Distribution and Protection of Long Cable Lenghts in TN and IT Systems - - - -
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