Miniature Circuit Breaker

Short Description:


1. Application : For protecting cables and equipments against overload and short circuit.

2. GeneraI ruIes for chooSing MCB.

a. TechnicaI data ofthe network at the point considered :

The earthing systems, short-circuit current at the circuit breaker installation point. which must always be Iess than the breaking capacity ofthis device, network normal voltage.

b. There are 3 curye characte ristics for magnetic operation

B curve(3-5 In)protection and control of the ci rcuits against length cables in TN and IT   systems.

C curve(5 – 10 In)protection and control ofthe ci rcuits against ove rloads and short-ci rcuits; protection for resistive and inductive Ioads with Iow inrush current.

D curve(10-14 In)protection and controI ofthe circuits against overloads and short. circuits;  Protection for circuits which supply loads with high in rush current at the circuit closing (LV/LV transformers,breakdown Iamps).


Product Detail

Product Tags


•Can be used in homes, offices, buildings and industries

•Overload protection

•Short circuit protection



Technical data

 •Standard: 60898-1

•Rated voltage: AC 230/400V

•Rated current(A):1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63

•Tripping curve: B, C, D

•Rated short-circuit capacity(Icn): 10kA

•Rated service short circuit breaking capacity(Ics):7.5KA

•Rated frequency: 50/60Hz

•Energy limiting class: 3

•Rated impulse withstand voltage: 6.2KV

•Electrical endurance: 8000

•Contact position

•Connection capacity: Rigid conductor up to 25mm²

•Terminal connection height: 19mm

Model Tripping curve Rated voltage(V) Poles Breaking capacity Icn Width
EBS9B B,C,D 230/400VAC 1P, 2P, 3P, 4P 10000A,15000A 19mm


•Elegant appearance; cover and handle in arc shape make comfortable operation.

•Contact position indicating window

•Transparent cover designed to carry label

•In case of overload, to protected circuit, MCB handle trips and stays at central position, which enables a quick solution to the faulty line. The handle cannot stay in such position when operated manually.

•High short circuit capacity 10KA for whole range and 15KA capacity for current rating up to 40A. thanks to the powerful electric arc extinguishing system.

• Long electrical endurance up to 6000 cycles thanks to quick making mechanism.

•  Handle padlock device

• MCB handle can be locked either at”ON” position or at :o ff” position to prevent unwanted operation of the product.

• Screw terminal lock device

•The lock device prevents unwanted or casual dismounting of connected terminals

Tripping Curve( MCB circuit breaker ):

Curve B: (3~5 In) protect and control circuit against overload and short circuit; protect people and length cables in TN and IT systems.

Curve C:(5~10 In) protect and control circuit against overload and short circuit; protect resistive and inductive loads with low inrush current.

CurveD: (10~20 In) protect and control circuit against overload and short circuit; protect circuits which supply loads with high inrush current when the circuit closing.

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