0034.3989

Series:	FSD 5x20
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Fuse Type:	Cartridge, Glass
Current Rating:	1.25A
Voltage Rating - AC:	250V
Response Time:	Slow
Package / Case:	5mm x 20mm
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	100A
Melting I²t:	20.8
Approvals:	CSA, UL
Operating Temperature:	--
Color:	--
Size / Dimension:	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

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Fuses: 0034.3989 Application Field and Working PrincipleFuses are important safety components, used in electrical systems to protect and prevent overloaded circuits. Fuse 0034.3989 will disconnect a circuit when the input current exceeds its rated value. It is designed for applications in low voltage or sub-zero temperature environments, making it highly reliable and trustworthy.The 0034.3989 fuse has a casing made from a silicone glass body, which serves to insulate the live parts of the fuse from the surrounding environment. This casing is mounted to a metal frame, usually a Nickel-Chrome molding, for temperature stability. The primary components of the 0034.3989 fuse are a fuse wire, a fusible link, and a type of non-linear resistor (NRL). The fuse wire acts as a current carrying element, while also providing overload protection. It is usually a strip of nickel silver or copper alloy, capable of carrying up to 600 amps. When the current is too high, the fuse wire melts, breaking the connection and protecting the circuit. The fusible link is an electrically sensitive element that responds to thermal changes in the surrounding environment. This part is made from a special alloy of lead and low temperature metals, which is fused at a specific temperature. When the temperature exceeds the fuse link temperature, it melts and causes the fuse wire to melt as well, thus breaking the circuit. The non-linear resistor is a special type of component made from a permanent magnet and a copper coil. Its job is to eliminate external noise and interference. When the input voltage rises, the magnet induces a reverse voltage in the coil, which further raises the voltage over time. This helps protect the components of the fuse from any high voltage surge, as well as minimize any potential damage to the circuit. In addition to the components mentioned above, the 0034.3989 fuse also features a fuse cap, which consists of a metal clip and a removable, insulated cap. This part ensures that the fuse is securely mounted to its holder, while also protecting the live parts from any outside electric shocks and electromagnetic interference. The 0034.3989 fuse is ideally used for low and sub-zero temperature applications, ranging from -40° to 85° Celsius. It is suitable for general-purpose AC or DC power distribution, over-current applications, and as a DC circuit protector. It is capable of withstanding up to 600 amps of current, making it highly reliable and trustworthy.In conclusion, the 0034.3989 fuse is a highly reliable and trustworthy component for protecting circuits from overloading. Its components are specially designed to protect and disconnect the circuit when the input current exceeds its rated value, even in low and sub-zero temperature environments. Its features and benefits make it an ideal choice for general-purpose AC or DC power distribution, over-current applications, and as a DC circuit protector.

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Part Number	Manufacturer	Price	Quantity	Description