Response Time:	Fast
DC Cold Resistance:	0.021 Ohms
Size / Dimension:	0.386" L x 0.120" W x 0.120" H (9.80mm x 3.05mm x 3.05mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	cURus
Melting I²t:	7.5
Breaking Capacity @ Rated Voltage:	100A AC, 2kA DC
Mounting Type:	Surface Mount
Package / Case:	2-SMD, Square End Block
Series:	0678D
Voltage Rating - DC:	125V
Voltage Rating - AC:	350V
Current Rating:	4A
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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0678D4000-02 Fuse

Application Field and Working Principle

Fuses are an important component of electrical systems. They provide protection for appliances and circuits by limiting the amount of electricity that can pass through it. The 0678D4000-02 fuse is a type of fuse designed to protect a variety of circuits in home, automotive, industrial, and commercial applications.The 0678D4000-02 fuse operates by using a thin element that melts when the electrical current passing through it exceeds its rated capacity. When this happens, it creates an open circuit and interrupts the flow of electricity, thereby protecting the circuit. The element is made of an alloy that melts at a specific temperature, usually 125˚C. This temperature point is known as the " melting point ".The 0678D4000-02 fuse is designed for devices that handle 15A to 20A AC circuits. It is built with a brass or copper body that is wrapped in a heat-resistant insulating sleeve. The end caps of the fuse are also made of a heat-resistant material. The internal element of the fuse is constructed with a metal wire or strip that has a high melting point.The 0678D4000-02 fuse can be used in several applications, including thermostats, circuit breakers, appliance panels, and ceiling fans. It is best suited for low-voltage applications and should not be used in high amperage applications. It can also be used to protect electronic circuits, such as those found in computers and electronic devices.The 0678D4000-02 fuse is a reliable device that offers a high level of protection for electronic circuits. It is easy to install and replace in case of a blown fuse. Furthermore, it is very affordable compared to other types of fuses.To ensure proper fuse protection, one should never exceed the rated current of the device by overloading the circuit. If this occurs, the element inside the fuse will quickly melt, resulting in an open circuit and no protection. It is important to determine the correct amperage rating needed for the application before installing the 0678D4000-02 fuse.In conclusion, the 0678D4000-02 fuse is a compact and reliable device that offers protection for various types of circuits, from low-voltage devices to high-amperage applications. By being aware of the rated current and not overloading the circuit, one can ensure that the 0678D4000-02 fuse provides the necessary protection and acts as a failsafe in the event of a surge or short.

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Part Number	Manufacturer	Price	Quantity	Description