SS-5H-1.25A-APH Circuit Protection

Package / Case:	Radial, Box
DC Cold Resistance:	57 Ohms
Size / Dimension:	0.335" L x 0.169" W x 0.329" H (8.50mm x 4.30mm x 8.35mm)
Color:	--
Operating Temperature:	-40°C ~ 85°C
Approvals:	CQC, cURus, KC, PSE, TUV, VDE
Melting I²t:	12.75
Breaking Capacity @ Rated Voltage:	100A
Mounting Type:	Through Hole
Series:	SS-5H
Response Time:	Slow
Voltage Rating - AC:	300V
Current Rating:	1.25A
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Introduction

Fuses are devices that interrupt electrical circuits, providing overcurrent protection by limiting the flow of current through a circuit. In the modern world, fuses are commonly used in various applications ranging from household appliances to the highly sophisticated equipment used in industrial environments. There are many different types of fuses, one of which is the SS-5H-1.25A-APH fuse. This article will explore the application fields and working principle of the SS-5H-1.25A-APH fuse.

Application Fields

The SS-5H-1.25A-APH fuse is a compact power fuses used for overcurrent protection of automotive, commercial vehicle, and otherequipment. It is used in applications such as motor starters, portable generators, and other power distribution circuits. These fuses are designed to withstand the harsh environment of engine compartments and can protect sensitive electrical components from the heat, vibration, and humidity of these environments.

Working Principle

The SS-5H-1.25A-APH fuse is a thermal type fuse. This means that its operation is based on the principle of thermal expansion. When current flows through a fuse, some heat is generated, which causes a thin strip embedded in the fuse to expand. If the current flow is greater than the fuse rating, the strip of metal will expand to a certain extent, creating an electric arc between the contacts of the fuse. This interruption of the current flow by the electric arc then prevents further increase in current and so prevents any further damage to the equipment.

Advantages

The SS-5H-1.25A-APH fuse offers a number of advantages compared to other types of fuses. Firstly, it is designed to be extremely compact, allowing it to be used in tight spaces and on densely packed boards. Secondly, it can provide a precise trip point and can be customized to meet specific needs. Thirdly, it can be used with a wider range of voltage and current ratings than other types of fuses. Finally, it can provide additional protection by eliminating the possibility of arcing between the fuse contacts.

Conclusion

The SS-5H-1.25A-APH fuse is an excellent choice for applications where high current protection is needed in a small, compact package. Its thermal operation principle provides reliable overcurrent protection and can help to prevent damage to equipment. By offering a range of advantages compared to other types of fuses, the SS-5H-1.25A-APH is a great solution for many applications.

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