0157003.DR

Response Time:	Fast
DC Cold Resistance:	0.0229 Ohms
Size / Dimension:	0.256" L x 0.146" W x 0.154" H (6.50mm x 3.70mm x 3.90mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	cULus, PSE
Melting I²t:	1.65
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Holder, Surface Mount
Package / Case:	2-SMD, Square End Block with Clip
Series:	NANO²® 157
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	3A
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

Fuses are electrical devices designed to protect electrical circuits from excessive current and resulting damage. In electrical terms, an excessive current is one that flows beyond normal operating conditions and can cause significant harm to the circuity components. Manufacturers have developed a variety of different fuse designs, each designed to meet the specific needs of the applications in which they are used.One of these fuse designs is the 0157003.DR fuse and it is designed for a variety of industrial applications. This article will cover the field of application and the principle of its operation.

Field of Application

The 0157003.DR fuse is a low-ampere-rated fuse suitable for a wide variety of applications, including automotive and industrial systems. It is specifically designed to protect the electrical components of small and medium-sized motors from prolonged overloads and short circuits. In addition, it also provides an effective means of protecting wiring systems from the damaging effects of overtemperature and undervoltage conditions.It is most commonly used to protect circuits with currents up to 60 amperes, but some versions are rated up to 250 amperes. The 0157003.DR fuse is also suitable for use in a wide range of voltage ratings, including 24, 32, and 48 volts DC.

Working Principle

The 0157003.DR fuse operates on the principle of thermal expansion and contraction. This is how it works: when the currents pass through the fuse wire, it creates heat, which causes the fuse wire to expand. When the current flow is reduced or interrupted, the temperature of the fuse wire drops, causing it to contract.This creates a time-delay relay action in which the electrical circuit stays open until the heat dissipates. This helps protect the circuitry from drawing excessive current, which can cause permanent damage.The design of the 0157003.DR also includes a variety of features for improved safety and reliability. The fuse contains a metal strip which melts when an excessive amount of current is drawn. When it melts, the current is automatically shut off. The design also includes a mechanism for resetting the fuse once the metal strip has melted and the current is shut off.

Conclusion

The 0157003.DR fuse is designed to provide effective protection against short circuits and overcurrents for industrial and automotive applications. Its time delay design helps to protect components from excessive current in a wide variety of voltage ratings, including 24, 32, and 48 volts DC. Its design also includes a variety of safety and reliability features, such as a metal strip which melts in the event of excessive current.

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