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What is the MC4 Inline Fuse Connector? What’s the Function?

        MC4 inline fuse connector is a protection device for electrical and electronic components. This connector protects the fuse and is usually waterproof. The waterproof rating of Slocable’s MC4 inline fuse connector is IP68.

        In the construction of traditional photovoltaic power stations, the construction party often considers cost control, and connects the surrounding cables of photovoltaic junction boxes, combiner boxes, inverters, etc. by direct converging method. Although the cost is controlled to a certain extent, reduced safety performance.

        As people pay more and more attention to safety, when constructing photovoltaic power stations at home and abroad, fuses are usually added to the positive or negative cables of peripheral cable equipment such as combiner boxes and inverters to increase overload protection to improve power station operations and personnel safety. The application and promotion of fuses have gradually increased the requirements for MC4 inline fuse connector components. The existing connectors have complex structures, low heat dissipation and waterproof performance, and low flame retardant grades, which not only reduce the operational safety of photovoltaic power plants, but also reduce operating personnel safety factor.


Slocable's MC4 inline fuse connector



Technology Realization Elements

        This product overcomes the above-mentioned shortcomings of the prior art, provides an MC4 inline fuse connector with a novel structure and simple installation process, and at the same time can solve the problems of low heat dissipation, low waterproof performance and low safety performance.

        A photovoltaic MC4 inline fuse holder includes a protective shell with a middle pass. Both ends of the protective shell are connected with a waterproof plug and a cap. The waterproof plug is located inside the cap and is provided with a threading hole.

        It also includes a positioning bracket located inside the protective shell. The positioning bracket is provided with threading holes and a supporting arm and the supporting arm abuts against the inner wall of the protective shell. The positioning bracket is used to prevent the fuse from contacting the protective shell and causing burns to the shell.

        Compared with the prior art, the advantage of this product is: the protective shell of the MC4 inline fuse connector is connected with a waterproof plug and a cap at both ends, and the waterproof plug is located inside the cap. This assembly makes the connector achieve a waterproof effect; The positioning bracket in this connector fixes the fuse at the axial center of the protective shell, which can prevent the fuse from contacting the protective shell and cause burns to the shell. At the same time, the fuse can dissipate evenly and avoid local overheating and shell deformation or softening. The photovoltaic MC4 inline fuse holder has a simple installation process and high efficiency, and it can be assembled cap with an automatic twisting nut machine. At the same time, it has high mechanical strength, good waterproof and heat dissipation effects, and high flame retardant grade. It is suitable for different regional environments and altitude requirements, and has a wide range of applications. This MC4 fuse holder can improve the operational safety of photovoltaic power plants and the safety factor of personnel.


The Function of MC4 Inline Fuse Connector

        Like other types of fuses, the main purpose of MC4 inline fuse connectors is to protect circuits in electrical or electronic equipment. If electrical equipment is suddenly overcharged by current, the filament in the fuse will melt and break the circuit. The MC4 fuse connector looks slightly different from other types of fuses, but it works in the same way. One of the most common uses of this fuse connector is in automobiles. And it is also used to protect the alternator and is designed to disconnect the circuit when the circuit is overloaded.


How to replace MC4 fuse?

        When you need to replace the MC4 fuse, you need to unscrew the two halves of the connection and divide the fuse holder into two parts. After separating the two halves, you can replace the old fuse with a new one.