MDQ-1/2

Series:	MDQ
Packaging:	--
Part Status:	Active
Fuse Type:	Cartridge, Glass
Current Rating:	500mA
Voltage Rating - AC:	250V
Response Time:	Slow
Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	35A
Approvals:	CSA, UL
Operating Temperature:	--
Color:	--
Size / Dimension:	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
DC Cold Resistance:	1.4 Ohms

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MDQ-1/2 Application Field and Working Principle

Fuses are electrical components designed to protect circuits and other electrical systems and components in cases of overcurrent, overload, short circuit, or other abnormal conditions that could cause potentially hazardous risks and damages. Specifically, the MDQ-1/2 fuse is a low voltage, miniature form factor designed to fit into tight spaces and designed to protect 8-32 VDC circuits.

Applications

The MDQ-1/2 fuse is suitable for use in applications including automotive, marine, computer, consumer electronics, and telecommunications. In automotive systems, it is suitable for battery protection and for controlling charging and discharging of both lead-acid and lithium-ion batteries, by protecting the electric drive systems in automotive applications. It can also be used in marine systems and in motor and starter protection for engineered power systems. In the computer, consumer electronics, and telecommunications environment, the MDQ-1/2 fuse is well suited for server and HVAC applications, cable management systems, and backup power applications such as uninterruptible power supplies (UPS). It is also suitable for electronic appliances and for protecting power bus control systems.

Working Principle

The MDQ-1/2 fuse consists of a metal strip or wire installed in a plastic holder, and is designed to open the circuit in the event of an overcurrent or overload. It works by breaking the circuit when the current in the circuit exceeds the rated current of the fuse. To prevent dangerous arcing when the circuit is broken, the MDQ-1/2 fuse is designed to blow a small amount of smoke when it opens, which helps dissipate the excess electricity and prevent dangerous sparks and arcs from forming. This smoke contains fine fragments of metal, which are designed to cause an artificial fault, which opens the circuit and quenches the arc. The MDQ-1/2 fuse is also designed to withstand a range of transient voltage peaks without failing. Transient voltage peaks occur when the voltage in a circuit suddenly rises above its rated value, and they can cause damage to the device or component if they are not properly protected. The MDQ-1/2 fuse is designed to absorb the energy from transient voltage peaks without blowing, protecting the component or device from damage.

Conclusion

The MDQ-1/2 fuse is a low voltage, miniature form factor designed to fit into tight spaces and designed to protect 8-32 VDC circuits. It is suitable for use in applications including automotive, marine, computer, consumer electronics, and telecommunications. It works by breaking the circuit when the current in the circuit exceeds the rated current of the fuse, and it is also designed to withstand a range of transient voltage peaks without failing. This makes it an invaluable component in ensuring the safety of electrical systems and components in such applications.

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