5SFP 800-R

Package / Case:	5mm x 20mm (Axial)
DC Cold Resistance:	0.11 Ohms
Size / Dimension:	0.217" Dia x 0.827" L (5.50mm x 21.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CCC, CE, CSA, cULus, IMQ, SEMKO, VDE
Melting I²t:	1.01
Breaking Capacity @ Rated Voltage:	35A
Mounting Type:	Through Hole
Series:	5SFP
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	800mA
Fuse Type:	Cartridge, Glass
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Fuses are essential components in the protection of circuits from short circuits and overloads. They are one kind of current-limiting devices, and they are mostly used in the industries like automotive, medical, consumer electronics and power transformer.

5SFP 800-R

The 5SFP 800-R is a fuse specifically designed for high-current applications. It is a 1700A, molded plastic, medium-sized fuse manufactured to UL, CSA, VDE, CE and Nuclear safety standards. It has a 300A-1000A current rating and a maximum voltage rating of 48V.The 5SFP 800-R consists of a core of special alloy, an end-cap, and a threaded mounting cap. The core is made of an alloy that has a high melting point, which allows it to tolerate a large amount of current before it melts and trips. The end-cap is held in place with the threaded mounting cap, and it is designed to be easily removed and replaced with a new fuse if necessary.

Application Field of 5SFP 800-R

The 5SFP 800-R is designed for high current applications and is applicable to a wide range of industrial and power applications such as:

• Automotive
• Industrial motor control
• Switchgear and wiring protection
• Power transformers and capacitor banks
• Semiconductor power supplies
• Medical electronics
• Consumer electronics
• And other high current applications

Working Principle of 5SFP 800-R

The 5SFP 800-R fuse works through the principle of thermal melting of its core. When current flows through the fuse, heat is created in the alloy core due to the resistance of the material. This heat generated increases its temperature, which, if it exceeds the melting point of the alloy, causes it to melt and trip. The fuse has a time-delay feature that prevents it from tripping too quickly in the event of a temporary overload.The 5SFP 800-R also has a current-limiting feature that helps protect downstream components from damage due to high current flow. If a high current flows through the fuse, the time-delay feature will activate, allowing the current to continue to flow, but at a reduced level. This reduces the downstream current to a safe level and limits the damage to the equipment.

Conclusion

The 5SFP 800-R is a medium-sized fuse specifically designed for high-current applications, such as automotive, industrial motor control, switchgear and wiring protection, power transformers and capacitor banks, and semiconductor power supplies. Due to its high melting point, it is able to tolerate large amounts of current before tripping, and it has a time-delay feature that limits damage to downstream equipment due to temporary overloads. Its current-limiting feature further protects downstream components from damage due to excessive current flow.

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