166.7000.4306

Package / Case:	Blade, ATO/ATC
DC Cold Resistance:	0.039 Ohms
Size / Dimension:	0.748" L x 0.197" W x 0.520" H (19.00mm x 5.00mm x 13.20mm)
Color:	Violet
Operating Temperature:	--
Approvals:	cULus
Melting I²t:	8.1
Breaking Capacity @ Rated Voltage:	1kA
Mounting Type:	Holder
Series:	FKS ATO®
Response Time:	Slow
Voltage Rating - DC:	80V
Current Rating:	3A
Fuse Type:	Automotive
Moisture Sensitivity Level (MSL):	--
Part Status:	Discontinued at Digi-Key
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses – 166.7000.4306 Application Field and Working Principle

Fuses are engineered and designed safety items used in various electrical systems, such as home appliances, manufacturing plants, entertainment venues, and automotive applications. These electric devices are designed to protect against certain types of electrical hazards, such as an over-current, short-circuit, or overload.
In this article, we will discuss the application field and working principle of a 166.7000.4306 fuse, specifically.

Understanding 166.7000.4306 Fuses

The 166.7000.4306 fuse is a three-pole, UL rated, non-rewirable, low voltage fuse (600 volts maximum) built from a quartz body with silver-plated contact surfaces and nickel seals to ensure corrosion resistance.
This fuse is designed to work in conjunction with electric motors ranging from 1-50HP. It is normally used in both series and parallel fusing arrangements to protect the motor from over-current and short-circuiting. The nominal system voltage of this fuse is up to 600VAC, with a maximum operating current of 250A. This fuse is also UL listed and complies with national and international standards, including UL, CEI and CSA.

Application Field

Due to its superior protection and robust construction, the 166.7000.4306 fuse is already installed in a variety of systems around the world. Examples of common applications include industrial motors, pumps, fans, compressors, and any other applications in industrial environments where over-current protection is needed. This fuse is also widely used in the automotive industry to provide over-current protection for car battery systems.

Working Principle of 166.7000.4306 Fuses

The underlying working principle of 166.7000.4306 fuses is quite simple. When the current reaches a certain level, the fuse will melt, causing the circuit to be broken. With the fuse completely melted, the current can no longer be carried, ensuring that the other parts of the system are not damaged.
The fuse has two components – a link wire and a thermal element. When the current passes through the link wire, it heats the thermal element, causing it to melt at a certain threshold. The melting threshold in the 166.7000.4306 fuse is approximately 250A, meaning that the fuse will only melt when the current reaches or exceeds 250A.
Once the fuse is melted, the flow of current is immediately broken, ensuring that the circuit is fully protected from any further damage.

Conclusion

In conclusion, the 166.7000.4306 is a three-pole, UL rated, low voltage fuse designed for use with electric motors ranging from 1-50HP. This fuse is designed to protect the motor from over-current and short-circuiting, and is used in both series and parallel fusing arrangements. Common applications of this fuse include industrial motors, pumps, fans, compressors and car battery systems. The underlying working principle of this fuse is quite simple – it melts at a certain threshold, thereby protecting the circuit from any further damage.

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