3JQ 300

Series:	3JQ
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Fuse Type:	Cartridge, Glass
Current Rating:	300mA
Voltage Rating - AC:	350V
Voltage Rating - DC:	140V
Response Time:	Fast
Package / Case:	2AG, 5mm x 15mm (Axial)
Mounting Type:	Through Hole
Breaking Capacity @ Rated Voltage:	100A AC, 150A DC
Melting I²t:	0.026
Approvals:	CE, CSA, cURus
Operating Temperature:	-55°C ~ 125°C
Color:	--
Size / Dimension:	0.217" Dia x 0.591" L (5.50mm x 15.00mm)
DC Cold Resistance:	1.18 Ohms

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Fuses – 3JQ 300 Application field and Working Principle

Fuses, in the form of electrical circuit protection, come in a variety of shapes, sizes, and amperage ratings. Among the most commonly used and trusted is the 3JQ 300 fuse, also known as a DIN Rail mount for industrial safety. The 3JQ 300 is a 50A, 600V, time-delay fuse designed to protect larger equipment and circuits from high levels of current and short-circuiting. Normally an inline fuse, it allows some delay on tripping in the event of a potentially damaging high-current power surge. This increases the safety of the workplace, and allows the user to have peace of mind that their circuit is well-protected as it works with their equipment to power up safely and securely.In the world of electricity, fuses are an important form of protection. Without a fuse, circuits would be left to deal with levels of amperage they could not handle. This could lead not only to destruction of the circuit, but also possible electrocution or fatal shock resulting from the high levels of electricity passing through.The main purpose of fuses is to regulate the amount of current that a circuit can handle. When too much current passes through a circuit, the increased level of amperage causes an increase in temperature. This increase in temperature is what causes a fuse to trip, cutting off the current flow and protecting the circuit from damage.The 3JQ 300 fuse makes use of a specific type of current-limiting technology called a Compact Negative Characteristic Curves (CNCC). This type of fuse has been specifically designed to provide fast-tripping and fast-opening for using in single-phase motor protection applications. The fuse features a narrow gap at the end of the element that quickly converges, creating an ultra-fast trip curve compared to standard fuses, which can provide limited protection from potentially hazardous current levels. An important factor to consider when selecting a fuse for a circuit is the type of current that will be flowing through it. The 3JQ 300 fuse was designed to provide protection for single-phase or three-phase circuits up to 600V at 50A. This makes the fuse ideal for use with most industrial applications, such as water fountains, air conditioning systems, and pumps.In addition to the current limitation provided by the 3JQ 300, the fuse also offers a degree of protection against overvoltage. When voltage rises above the rated value of the fuse, the silver element in the fuse starts to rise, reducing its current rating and eventually breaking the circuit. This is an important safety feature that can prevent a dangerous surge of electricity from going through a circuit and potentially damaging equipment or causing injury to personnel. In summary, the 3JQ 300 fuse is an essential piece of equipment in any industrial setting. Its time-delay features and ultra-fast trip characteristics provide optimum protection from potentially hazardous levels of current should a surge or overload occur. With its versatility and dependability, it is an ideal choice for those looking for a reliable fuse to protect their circuits and equipment.

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