0157.375DRT

Response Time:	Slow
DC Cold Resistance:	1.2214 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
Melting I²t:	0.101
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Holder, Surface Mount
Package / Case:	2-SMD, Square End Block with Clip
Series:	NANO²® 157T
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	375mA
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 devices that protect electrical systems and circuits from unsafe current levels by disconnecting the circuit when the current exceeds a predetermined limit. The 0157.375DRT fuse is an example of such a device, designed to protect telephone lines from large spikes of current. In this article we will discuss the applications and workings of this fuse.

Applications

The 0157.375DRT Fuse\'s main application is in protecting digital telephone lines from accidentally exceeding the National Electrical Code (NEC) guidelines. The maximum current allowed to pass through such lines is 20 amperes, and this is the limit the fuse is designed to monitor. The fuse can be used on both indoor and outdoor telephone lines, as its inspection-style exterior is waterproof and built to last.The 0157.375DRT Fuse has also been used in non-telephone applications, such as in circuit-breakers, voltage regulators, and other devices that require the monitoring of current in order to keep circuits safe.

Working Principle

The 0157.375DRT Fuse operates on an overload protection principle. Under normal conditions, the fuse allows the current to pass through its element - a metal alloy wire. This wire is designed to have a specific amount of resistance, and this is what keeps the current within the safe limit of 20 amperes. However, if the current flowing through the fuse begins to exceed 20 amperes, the resistance of the wire will cause a large amount of heat to be generated within the element. This heat will quickly reach a temperature that causes the element to fail, interrupting the circuit and thus preventing harm to the system.Once the overload is removed, the fuse can then be replaced. The 0157.375DRT Fuse is designed to be easily replaceable, with no tools required for installation.

Conclusion

The 0157.375DRT Fuse is designed for use in protecting digital telephone lines from unsafe current levels. It operates on an overload protection principle, in which an element inside the fuse will fail when it is heated by current that exceeds the preset limit of 20 amperes. The fuse is waterproof and designed for easy replacement, making it suitable for indoor and outdoor use.

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