MDQ-4

Series:	MDQ
Packaging:	--
Part Status:	Active
Fuse Type:	Cartridge, Glass
Current Rating:	4A
Voltage Rating - AC:	250V
Response Time:	Slow
Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	200A
Approvals:	CSA, UL
Operating Temperature:	--
Color:	--
Size / Dimension:	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
DC Cold Resistance:	0.0351 Ohms

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MDQ-4 Fuses: Application Fields and Working Principles

MDQ-4 fuses are the latest technology in the fuses market. The advantages of MDQ-4 fuses over traditional fuses include higher current ratings, increased safety, and durability. As such, they are widely used in a variety of applications. In this article, we will discuss the application fields and the working principles of MDQ-4 fuses.

Application Fields

MDQ-4 fuses are primarily used in the electrical industry as disconnecting means, overcurrent protection devices, and earth-leakage protection devices.In the electrical industry, MDQ-4 fuses are used as disconnecting means. These fuses are an essential safety feature for circuit breakers, switchboards, and motor control centers (MCCs). In the event of a power overload or short circuit, MDQ-4 fuses will interrupt the current flow, thereby preventing electrical fires.MDQ-4 fuses are also used as overcurrent protection devices. This involves conducting a constant monitoring of the electrical current and immediately responding to any overly high currents. This prevents electrical overloads and short circuits, resulting in increased safety for both the equipment and the people using it.Finally, MDQ-4 fuses can also be used as earth-leakage protection devices. This ensures that any leakage or surge in the earth current is quickly detected and interrupted. This helps to prevent shock hazards and potential electrocution.

Working Principles

MDQ-4 fuses are composed of multiple materials such as copper, tin, silver, and lead. When an electrical current is introduced to the fuse, it passes through the fusible element of the MDQ-4 fuse. The heat generated by the current causes the fusible element to melt.Once the current has reached a predetermined level, i.e. 10x the rated current of the MDQ-4 fuse, the fusible element melts and interrupts the current flow. This results in the reduced risk of fire hazards, overloads, short circuits, and earth leakage.

Conclusion

MDQ-4 fuses are the latest technology in the fuses market. They offer higher current ratings, increased safety, and durability. As such, they are widely used in a variety of applications such as disconnecting means, overcurrent protection devices, and earth-leakage protection devices. The working principle of MDQ-4 fuses involves the heat generated by the electrical current melting the fusible element, thus interrupting the current flow.

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