031201.5HXP

Series:	312
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Fuse Type:	Cartridge, Glass
Current Rating:	1.5A
Voltage Rating - AC:	250V
Response Time:	Fast
Package / Case:	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	100A
Melting I²t:	2.35
Approvals:	CE, CSA, PSE, UL
Operating Temperature:	-55°C ~ 125°C
Color:	--
Size / Dimension:	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
DC Cold Resistance:	0.1036 Ohms

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Fuses Application Field and Working Principle

Fuses are an important element in the modern electrical system and are widely used in the power, lighting and signal circuits. Fuses are automatic switching devices that can protect electrical circuits from being damaged by overcurrent and short circuit. Fuse is made up of fuse body and fuse element. The fuse has a certain current rating. When the current of the fuse exceeds its rated current, the fuse will be damaged to open the circuit. In general, the 031201.5HXP fuse is mainly used in the circuit of single phase AC 50Hz, rated voltage 220V/400V and rated current 32A.

Principles of Fuses

Fuses use the principles of melting and interruption to limit and protect the circuits. When the current is less than the predetermined value, the fuse will not be damaged, but when the current exceeds the predetermined value, the fuse will be damaged and the circuit will be automatically opened. The three major principles of the fuse are melting principle, alloy principle and segmental principle.

Melting Principle

When the current flows through a current-limiting device, the thermal effect of the current is generated, which increases the temperature of the fuse. When the temperature of the fuse exceeds the melting point of the fuse element, the fuse element melts, then the circuit is broken, and finally the circuit is shielded and protected.

Alloy Principle

In the alloy fuse element, it is made of a special alloy wire with a special melting point. When the operating current of the fuse element exceeds the fuse rating, the temperature of the fuse element will rise, and the alloy wire will melt at the temperature close to its melting point.The alloy wire melted by heat will expand in volume and break the circuit.

Segmental Principle

The segmental fuse is composed of a segmentally mounted fuse element. When the over-current occurs, the heat generated by the current during the process will cause the cylinder around the fuse element to expand, causing the fuse element to break due to the pressure and heat generated by the expansion. When the current falls to a safe value, the fuse is at rest.

Advantages of Fuses

Fuses have the following advantages over general circuit breakers.

Small Size

Fuses have a smaller size, and some high-voltage electrical circuits require miniature fuses for connections.

Light Weight

Because of the small size, the weight of the fuse is also reduced accordingly, usually ranging from tens of grams to several hundred grams.

Rapid Action

The response time of the fuse is in milliseconds, so it can respond quickly when an over-current occurs.

Low Cost

Because the fuse structure is simple, the cost is low, so it is generally a kind of cost-effective protection device.

High Sensitivity

The fuse has high sensitivity, and the over-current or short-circuit can be sensed immediately, so it can effectively protect the safety of the circuit.

Convenience

The fuse is simple to install, it is easy to understand and has a wide range of applications.

Conclusion

Fuses are widely used in circuit protection and are an indispensable part of all electrical systems.The 031201.5HX fuse is widely used in the circuit of single phase AC 50Hz, rated voltage 220V/400V and rated current 32A.When the current exceeds the predetermined value, the fuse element will be damaged to open the circuit. Fuses are advantageous in terms of size, weight, rapid response, low cost, high sensitivity and convenience. All these advantages make it an ideal choice for circuit protection.

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