L7 Mini Circuit Breaker MCB

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China Main Port
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TT or LC
Min Order Qty:
100 Pieces pc
Supply Capability:
10000 Pieces per Month pc/month

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L7 has protective function of overload, and is used in lighting distribution system in industry, commerce, dwelling and protect fractional electric motors. They also have many merits of high protective grade (up to IP20), high breaking capacity, reliable sensitive action, convenient multi-pole assembling and long life. They are mainly adapted to the circuit of AC 50Hz, 230V in single-pole, 400V in double/three/four-pole for protecting overload and short circuit. Meanwhile, they are also used in turning on or off the electric apparatus and lighting circuit under the normal conditions.



1) Conforms to standards of electrical EN60898 (IEC898), GB10963-99

2) Rated current: 230V/400V, 50/60Hz

3) Rated breaking capacity: 10kA IEC898 (0.5 - 63A), 15kA IEC947-2 (0.5 - 63A)

4) Short circuit breaking capacity of DC: max. 48V (KL7, 10kA) single-pole, max. 250V (KL7-DC, 6kA) single-pole

5) Performance: C, D characteristic curve

6) Max. fuse that can be connected to: 100AgL (>10kA)

7) Selective grade: 3

8) Working ambient temperature: -5 - 40°C

9) Enclosed protective class: P40 (under mounting)

10) Life:

a) Electrical: not less of 8,000 times switching operation

b) Mechanical: not less of 20,000 times switching operation


Main technical parameters

Number of poles 1P 2P 3P 4P
Rated Current(In) 1-63A
Rated Voltage(Un) AC 230(240)/400(415)V
Rated frequency 50(60)Hz
Curve B C D
Short-circuit breaking capacity(Icn) 10000A
Magnetic releases operate        B curve: between 3 and 5 In/C curve: between 5 and 10 In/D curve: between 10 and 14 In
Endurance   ≥ 4000
Terminal protection IP20



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Q:Why does the rated current of the fuse be based on the effective value as a standard?
The thermal effect of the conductor depends on the effective value of the current. So it is based on the effective value of the standard.
Q:What are the hidden faults of the automatic reset fuse?
Fuse is a very important part of the electric faucet product, the line is called "overheating protection", mainly from the role of over-temperature and anti-dry protection, when the machine temperature occurs when the automatic fuse off the power supply to protect the consumer And property security.
Q:What material can be used to make fuse fuse
Fuses have a variety of different fuse characteristics, can be applied to different types of protection needs of the object
Q:Broken speed, which can be divided into?
Japanese regulatory fuse (PSE).
Q:Fuse inspection check how to do?
check the appearance of the fuse damage, deformation, porcelain insulation part of the presence of flicker discharge traces.
Q:What is a tube fuse
If the tube is vacuumed, it is called a vacuum fuse. If the tube filled with SF6 gas, known as the SF6 fuse, the purpose is to improve the arc performance. As the quartz sand, vacuum and SF6 gas have good insulation properties, so this fuse is not only suitable for low pressure is also applicable to high pressure.
Q:Fuse fuse all the reasons
Pulse: When the circuit starts or the power supply is unstable, a momentary current causes the fuse to break
Q:What is the role of the circuit breaker
In the event of system failure with the protection device and automatic device to match, quickly cut off the fault current, to prevent the accident to expand, so as to ensure the safe operation of the system.
Q:What is the best material for electric brake fuses?
accompanied by rising current, and the rising current may damage some important devices in the circuit or expensive devices, it may burn Circuit and even cause a fire
Q:How to classify fuses
According to the scope of use, can be divided into: power fuse, machine fuse, electrical instrument fuse (electronic fuse), car fuse.
We are a professional manufacturer engaged in the research, development, production, sale and service of Low voltage electrical products, such as AC contactors, MCBs, MCCBs and RCCBs. Selling well in all cities and provinces around China, our products are also exported to clients in such countries and regions as the Middle East, Southeast Asia, and so on. We also welcome OEM and ODM orders

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Location Zhejiang,China
Year Established 2010
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