EKM3-63 6kA Miniature Circuit Breaker
EKM3-63 6kA Miniature Circuit Breaker
EKM3-63 6kA Miniature Circuit Breaker
EKM3-63 6kA Miniature Circuit Breaker
EKM3-63 6kA Miniature Circuit Breaker

> EKM3-63 6kA Miniature Circuit Breaker

  • Categories:Miniature Circuit Breaker
  • MOQ:1
  • Brand:ETEK
  • FOB Port:Ningbo, Zhejiang
  • Terms of Payment:Western Union,T/T Paypal
  • Delivery Time:15 Working Days

circuit breaker,Miniature circuit breaker,MCB,EKM3-63

EKM3-63 Miniature Circuit Breaker is the latest product developed by our company. This series of products have complete specifications and the max rated current can reach 63A. This series of products have clear green and red marks for ON-OFF and transparent cover for line marks. EKM3-63 can be used with other products for residential power distribution systems ≤63A.

Electrical Features

Rated current In



1P, 1P+N, 2P, 3P, 3P+N,4P

Rated voltage Ue


Insulation voltage Ui


Rated frequency


Rated breaking capacity


Energy limiting class


Rated impulse withstand voltage(1.5/50) Uimp


Dielectric test voltage at ind. Freq. for 1 min


Pollution degree


Thermo-magnetic release characteristic

B, C, D

Mechanical Features Electrical life 8,000 Cycles
Mechanical life 20,000 Cycles
Contact position indicator Yes
Protection degree IP20
Reference temperature for setting of thermal elements 30℃
Ambient temperature (with daily average≤35℃) -5℃~+40℃
Storage temperature -25℃~+70℃
Installation Terminal connection type Cable/Pin-type busbar/U-type busbar
Terminal size top/bottom for cable 25mm2   18-3AWG
Terminal size top/bottom for busbar 25mm2   18-3AWG
Tightening torque 2.5Nm 22In-Ibs
Mounting Mounting on DIN rail EN60715(35mm) by means of fast clip device
Connection Power supply in both directions
Combination with accessories Auxiliary contact EKM1-OF
Alarm contact EKM1-FB
Shunt release EKM1-MX
Over/Under voltage release EKM1-MV+MN

MCB Characteristics Curves

Thermal Tripping
Magnetic Tripping
Asper IEC60898
No tripping current
Tripping current I2
Time Limits t
Hold current I4
Trip current I5
Time Limits t
B Curve


C Curve
1.13×IN   ≥1h 5×IN   ≥0.1s
  1.45×IN <1h  
D Curve
Tripping characteristics

Based on the Tripping Characteristics, MCB are available in “B”, “C” and “D” curve to suit different types of applications.
“B” Curve for protection of electrical circuits with equipment that does not cause surge current (lighting and distribution circuits) Short circuit release is set to (3-5) In.
“C” Curve for protection of electrical circuits with equipment that cause surge current (inductive loads and motor circuits) Short circuit release is set to (5-10) In.
“D” Curve for protection of electrical circuits with cause high inrush current, typically 12-15 times the thermal rated current (transforms, x-ray machines etc,) Short circuit release is set to (10-20) In.

Circuit Diagram

Overall and Installation Dimension(mm)

Why choose us?
Why choose us 1

ETEK Electrical has advanced production management system and production process.200 employees,4 production workshops,6 automatic production lines more than 60 sets of test and detection equipment.

Why choose us 2

The annual production capacity is as follows:15 million miniature circuit breakers,1 million residual current circuit breaker,150 thousand moulded case circuit breakers,20 thousand frame circuit breakers,500 thousand AC contactors,and 1 million button indicator lights.

Why choose us 3

A complete set of parts testing standard and supplier managementstan dard has been developed.In the manufacturing process , there is parts inspection , process inspection. Verification inspection Parts inspection includes welding strength , welding size and appearance inspection.

Why choose us 4

Process inspection includes mechanical operation test , contact terminal parameter test and so on Verification inspection includes long delay characteristic inspection other characteristic inspection , appearance inspection and packaging inspection.

Why choose us 5

ETEK has made a great deal of investment in thedevelopment of new products and the construction of R & D team. Now , the company has independent R & D labs 3 senior R & D engineers and 5 professional technicians and isalso equipped with advanced testing equipment.

Why choose us 6

Most of the products are supportedCCC certificate and international certificates certified by TUV Intertek such as CB SEMKO , CE INMETRO and SAA. In order to reduce the damage during the transportation our products have pallet packaging rich industry experience.

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