SPFI03.5T

Applications:	Solar (Photovoltaic)
DC Cold Resistance:	0.581 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:	3.5A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

SPFI03.5T is a Resettable Fuse, which belongs to Electrical, Specialty Fuses. Developed by Shin-Etsu Chemical, it is mainly used in various automotive and consumer electronics. This fuse not only exhibits sterling voltage and current characteristics but also allows the user to monitor and reset the system. This article aims to discuss the application fields and working principle of SPFI03.5T in detail.

Application Fields

SPFI03.5T is widely available across the markets and can be found in medical and communication fields. It is specifically designed for linear circuits, protecting against any surge currents or short-circuits. In automotive field, it monitors the Load Voltage supply and will reset the system once the normal voltage is restored.

Working Principle

The main body of SPFI03.5T consists of a cold resistive element; a secondary current limiting element and a thermistor. The thermistor prevents the resistive element from absorbing any major surge currents while the secondary current limiting element limits excessive current. When the load voltage is temporarily increased or short-circuited, the heat produced by the resistive element will activate the thermistor, which will cut off the electricity supply. Once the supplies are reset, the thermistor will cool and the resistive element will absorb the current again.

Features

SPFI03.5T has several outstanding properties. One of them is its compact size, which makes it perfectly suitable for medical and industrial applications. Another property is its resetting function, which provides safety to the system. It also has outstanding current-limiting capacity; when short-circuited, the current will not exceed 500A. Last but not least, it offers excellent noise immunity, providing superior performance in noisy environments.

Advantages

SPFI03.5T has a wide range of advantages. As mentioned earlier, its small size makes it ideal for medical and other small applications. Moreover, it can easily handle high temperatures and shows excellent performance in high temperature environment. Additionally, it exhibits incredible surge absorbance capabilities, withstanding pulse currents of up to 500A. Lastly, its resetting function gives a high level of safety and protection from any sudden surges.

Conclusion

In conclusion, SPFI03.5T is a specialized resettable fuse which belongs to Electrical, Specialty Fuses. It is mainly used in automotive and consumer electronics field and boasts incredible properties. It has a compact size, excellent noise immunity level and high current-limiting capacity. Furthermore, its resetting ability and surge absorbance capabilities make it a perfect choice for any application.

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