SPFI020.L

Applications:	Solar (Photovoltaic)
DC Cold Resistance:	0.0045 Ohms
Size / Dimension:	0.406" Dia x 2.500" L (10.31mm x 63.50mm)
Package / Case:	Cylindrical, Blade Terminals
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	20kA
Operating Temperature:	--
Approvals:	CE, UR
Class:	--
Features:	--
Series:	POWR-GARD® SPFI
Response Time:	Fast
Voltage Rating - DC:	1kV
Current Rating:	20A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Electrical, Specialty Fuses: SPFI020.L Application Field and Working Principle

SPFI020.L, a new type in speciality fuses, is an engineered low-current-rated fuse designed for applications, such as automotive systems and consumer electronics products. Due to its small size and substantial current rating, SPFI020.L can be used to build efficient and safe power protection circuits. This article provides an overview of SPFI020.L application field and working principle.

SPFI020.L Application Field

SPFI020.L is a low-current-rated fuse designed for automotive systems, consumer electronics products, and other applications that require low current. Being UL Recognized, CSA Certified, and IEC60127-2 Certified, SPFI020.L can be used in a wide range of systems with various protection requirements. As a new series of SPFI speciality fuses, SPFI020.L has one of the highest current ratings of fuses its size class and offers superior protection. SPFI020.L has been tested for a variety of surge currents up to 8kA with an average low-voltage drop of 11mV and a maximum of 17mV. Additionally, it features low on-resistance and fast blow time.

SPFI020.L Working Principle

The SPFI020.L fuse consists of a hollow metal tube that encloses an internal wire element. The internal element is embedded in a ceramic or porcelain inner layer, which imparts strength and heat resistant properties to it. The external tube is enclosed by a ceramic coating, making it electrically insulated. The fuse is fitted with end caps, which are made of metal and are connected to the internal wire element.When the current passing through the SPFI020.L exceeds its rated value, the energy generated starts to heat up the fuse making the internal wire element start to melt. When a spark is detected at the end caps, the air present in the fuse starts to expand rapidly, resulting in an explosion that breaks the internal wire and isolates the circuit. This effect causes an immediate interruption of the circuit flow, thus preventing damage to the device or system.

Conclusion

In conclusion, SPFI020.L is an engineered low-current-rated fuse that can be used for various protection requirements in automotive systems, consumer electronics products and other applications. It features a low-voltage drop and a fast blow time, making it an ideal choice for efficient and safe power protection circuits. Furthermore, its working principle is based on the rapid expansion of air caused by a spark at the end caps which results in an immediate interruption of the circuit and offers maximum protection against excess current.

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