5HF 125

Package / Case:	5mm x 20mm
DC Cold Resistance:	2.78 Ohms
Size / Dimension:	0.201" Dia x 0.787" L (5.10mm x 20.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CCC, CE, CSA, UL
Melting I²t:	0.005
Breaking Capacity @ Rated Voltage:	1.5kA
Mounting Type:	Holder
Series:	5HF
Response Time:	Fast
Voltage Rating - AC:	250V
Current Rating:	125mA
Fuse Type:	Cartridge, Ceramic
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Fuses are an important safety device used to protect electric circuits from overload. The 5HF 125 is a fuse created by the German manufacturer Siemens. It is designed for applications in the power network, ranging from 120V to 500V. The fuse is constructed from silver-plated zinc oxides with a cap containing a thermal fuse. The 5HF 125 is capable of handling currents ranging from 2mA to 125A.

Application Field

The 5HF 125 is designed for use in a variety of applications in the power network. These include controlling and protecting electric motors, heating appliances, lighting, communications systems and other electrical circuits. The fuse is also used to protect circuits from thermal overloads, overcurrents and short circuits.

Working Principle

When an overload or short circuit occurs in the electric circuit, the 5HF 125 fuse will detect the abnormality. The fuse contains a small strip of metal, usually silver, which melts when a certain current level is exceeded. When the strip melts, the circuit is broken and the electricity is cut off from the circuit. This helps to protect the circuit from further damage.

Advantages and Limitations

The 5HF 125 fuse provides a number of advantages over other types of fuses. It is a relatively low-cost fuse option, and the small size makes it ideal for many applications. The fuse is also designed to be easy to install and replace. However, the 5HF 125 has some limitations. The fuse is only suitable for low-voltage applications; higher voltage circuits will require a different type of fuse. The fuse can also be prone to overfusing, which can lead to permanent circuit damage.

Conclusion

The 5HF 125 is a reliable and cost-effective fuse designed for applications in the power network. The fuse is able to detect overloads and short circuits, helping to protect the circuit from further damage. While the 5HF 125 does have some limitations, it offers advantages over other types of fuses and is suitable for many applications.

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