Package / Case:	5mm x 20mm (Axial)
DC Cold Resistance:	0.0137 Ohms
Size / Dimension:	0.228" Dia x 0.886" L (5.80mm x 22.50mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, VDE
Melting I²t:	42.795
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Through Hole
Series:	217
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	5A
Fuse Type:	Cartridge, Glass
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Fuses

0217005.MRET1P Application Field and Working Principle

Fuses are used in many electrical installations or devices, for instance, in electrical circuits of buildings, vehicles, industrial machinery or more. The 0217005.MRET1P fuse is designed for medium voltage applications in relation to motor protection, generator protection or other specific industrial requirements. This fuse is specifically designed to protect automotive wiring harnesses in demanding applications such as off-road, high ambient temperature and high shock or vibration environments.

Structure and Working Principles

The working principle of the 0217005.MRET1P fuse is based on the use of a non-linear resistor element inside the enclosure. This non-linear element works as a pressure-sensitive resistor, meaning that when a certain level of current passes through it, there is a pressure increase in the element. When the pressure becomes high enough, it will cause a short circuit in the fuse, thus breaking the circuit.When it comes to structure, it is a two-piece element consisting of a main body, which is made of an alloy of copper with a high melting point, and a center core which is manufactured by winding the electrical conductor of the conductive wire or cable through it. The center core is then sealed in a plastic enclosure that is designed to contain the non-linear resistor element. The resistor element, when energized, will create a pressure that will increase until it reaches a predetermined level which will cause the fuse to short circuit and thus break the circuit.

Advantages

The 0217005.MRET1P fuse has a number of advantages when compared to conventional fuses. For instance, the fuse offers superior protection against short-circuits, high shock or vibration situations or extreme temperature changes. In addition, its non-linear resistor element has a higher melting point compared to a common fuse, meaning it can handle higher temperatures and current surges. It also requires less time for installation or replacement due to its plastic enclosure.

Disadvantages

Despite the numerous advantages of using the 0217005.MRET1P fuse, there are occassional challenges which could arise during operation. The fuse may react slower than a conventional fuse in certain high-temperature situations or high surge currents, leading to further damage to the protected equipment. Also, it is more expensive than a conventional fuse due to its advanced construction.

Conclusion

The 0217005.MRET1P fuse is an advanced type of fuse used to protect automotive wiring harnesses in demanding applications such as off-road, high ambient temperature and high shock or vibration environments. It is typically more expensive and requires more maintenance than a regular fuse, however it offers superior protection in most situations. It is ideal for applications such as motor protection, generator protection or other specific industrial requirements.

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