0001.1011

Series:	SP 5x20
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Fuse Type:	Cartridge, Ceramic
Current Rating:	5A
Voltage Rating - AC:	250V
Response Time:	Fast
Package / Case:	5mm x 20mm
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	1.5kA
Melting I²t:	30.8
Approvals:	CCC, cURus, KC, PSE/JET, VDE
Operating Temperature:	-55°C ~ 125°C
Color:	--
Size / Dimension:	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

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Introduction

A fuse, also called a circuit breaker, is a protective device used in electrical circuits to protect from short circuits, power overloads and other dangerous conditions. Fuses are divided into two main categories: current-limiting fuses and non-current-limiting fuses. The two general types of fuses are described as follows:

001.1011 Application Field and Working Principle

Current-Limiting Fuses

Current-limiting fuses are designed to disconnect a circuit when excessive currents flow due to an overload, short circuit or ground fault. These fuses are rated in amperes and are typically used in high-current applications to protect the electrical circuit from over-currents by limiting the amount of current that may flow in the circuit. When a current-limiting fuse is connected to a circuit, it will disconnect the circuit if a preset current level is exceeded. The current rating for a current-limiting fuse is usually stated on the fuse itself and is often indicated by a color code or lettering on the fuse body.

Non-Current Limiting Fuses

Non-current limiting fuses are designed to disconnect a circuit when current levels exceed safe levels. These fuses are rated in volts and are typically used in low-voltage applications to protect the electrical circuit from excessive currents. When a non-current limiting fuse is connected to a circuit, it will disconnect the circuit when a preset voltage level is exceeded. The voltage rating for a non-current limiting fuse is usually indicated on the fuse itself and is often indicated by a colored stripe or lettering on the fuse body.

Types of Fuse Elements

Fuse elements for both current-limiting and non-current limiting fuses are classified according to their current or voltage ratings. The following are some of the most common types of fuse elements available:

• Thermoplastic Fuse Elements: These are typically used in high-amperage applications and can be categorized by their temperature rating. They are composed of a plastic material that melts when heated and thereby causes a circuit interruption.
• Ceramic Fuse Elements: These are typically used in low-voltage and low-amperage applications. They are composed of ceramic material that breaks when heated and causes a circuit interruption.
• Fuse Links: Fuse links are typically used in high-current applications and can be categorized by their current rating. They are composed of metal material that melts when overloaded and thereby causes a circuit interruption.
• Resettable Fuse Elements: These are typically used in low-voltage and low-current applications. They are composed of a resettable material that trips when overloaded and causes a circuit interruption. The circuit can then be reset when the current drops back below the trip threshold.

Conclusion

Fuses are a very important part of electrical safety and are necessary for protecting circuits and equipment from damage or failure. By understanding the different types of fuses and their applications, it is possible to choose the right fuse for the job and ensure a safe and reliable working environment.

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