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MCB 10kA

An MCB operates as an automatic switch that opens in the event of excessive current flowing through the circuit and once the circuit returns to normal, it can be reclosed without any manual replacement.

Standard ConformityIS/IEC 60898-1
No. of Pole1P, 1P+N, 2P, 3P, 3P+N, 4P*
Magnetic Release Setting(3-5)In(5-10)In
Method of MountingClip on Din rail (35×7.5mm)
Rated Operational Voltage240/415V
Rated Current6 to 63A*
Rated Frequency50Hz
Rated Short Circuit Capacity10kA
Max. Value of I2 t (Joule Integral)125000
Rated Insulation Voltage660V
Rated Impulse with stands Voltage4kV
Material GroupIII a
IP CategoryIP20
Ambient Temp.-5º to 55ºC
Tightening Torque2.Nm
Dielectric Test Voltage2.5kV
Energy Limiting Class3
Installation PositionVertical/Horizontal
Bi-connect TerminalBoth side
Line & Load Terminal Capacity25 mm2
Resistance to Shock40mm free fall
Endurance Mechanical & Electrical Cycles8000


  • 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
  • *1P = Single Pole
  • *1P+N = Single Pole & Neutral
  • *2P = Double Pole
  • *3P = Three Pole
  • *3P+N = Three Pole & Neutral
  • *4P = Four Pole

Miniature Circuit Breakers have precisely formed molded case & cover of flame-retardant high strength thermo-plastic material having high melting point, low water absorption, high dielectric strength and temperature with stand. The Switching Mechanism is independent, manual and trip free, i.e, the breaker trips internally even if the operating knob is held in ON position.

The Contact Mechanism comprises of fixed & moving contacts specially designed for reliability, long life and anti-weld properties. The Arc Extinguishing Device comprises of 12 plates arc chute. The arc under the influence of the magnetic field and arc guide is moved into the arc chute where it is rapidly split and quenched. The tripping mechanism is thermal magnetic type.


The thermal operation provides protection from moderate overload. During a current overload, a thermo-metallic element (bimetallic strip) deflects until it operates a latching mechanism allow the main contacts to open.


In a magnetic operation, large overloads or short circuit current actuates a solenoid causing a plunger to strike the latching mechanism rapidly opening the main contacts.

Type B Characteristics curves

Type C Characteristics curves


Large & Dual Terminals


MCB Padlock


Energy Limiting Class 3


Effective Air Circulation


Fire Retardant


IP 20 Protection


ON/OFF Indication


BI-stable Din Clip


10kA Breaking Capacity


Low Power Consumption