L7 Mini Circuit Breaker MCB

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

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Product Description:



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:When using low-voltage fuses, note that
single-phase line should be installed on the neutral line fuse; in the three-phase four-wire loop on the neutral line, the use of zero protection on the zero line is strictly prohibited fuses;
Q:According to the breaking speed, can be divided into
Special slow fuse (usually expressed in TT).
Q:Why is the fuse broken
The fuse value of the fuse is above the rated current
Q:Fuse is an overcurrent protection appliance.
the heat generated by the melt itself melts the melt and disconnects the circuit
Q:What is the self-recovery fuse:
Since the fuse can only limit the short circuit current, can not really break the circuit. The advantage is that you do not have to change the melt and can reuse it.
Q:How to classify fuses
Fuses for overcurrent protection are commonly known as fuses (also known as current limiting fuses). Fuses for overtemperature protection are commonly referred to as "temperature fuses".
Q:What is a spiral fuse:
the current level of 200A the following circuit, for short circuit protection.
Q:How to read the fuse ring
so the resistance of the resistance: 220000Ω = 220 KΩ, the error is 5% 1.4.2 colored ring resistance: is a precision resistor, with five color ring to represent the resistance value, method and four-color ring resistance The same
Q:What is a closed fuse:
for the voltage level 500V below the current level of 1KA the following circuit.
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
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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