0251005.HAT1L

Response Time:	Fast
DC Cold Resistance:	0.0155 Ohms
Size / Dimension:	0.110" Dia x 0.280" L (2.80mm x 7.11mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CCC, CSA, PSE, TUV, UR
Melting I²t:	4.14
Breaking Capacity @ Rated Voltage:	50A AC, 300A DC
Mounting Type:	Through Hole
Package / Case:	Axial
Series:	PICO® II 251
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	5A
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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Fuses: 0251005.HAT1L Application Field and Working Principle

Fuses are quite common in everyday life. Not only do electricity boards contain hundreds of such safety devices, but even portable technical objects such as mp3 players use minaturized, so-called SMD-fuses. In this article, the discussed safety device is model 0251005.HAT1L – a modern 5mm x 20mm (5 x 20) European midget fuse.The 0251005.HAT1L features a ceramic or bakelite body anodized with a nickel coating. It has a double flat fuse end crimp coding, 32V AC/DC maximum voltage rating and 500V AC maximum breaking capacity, and is typically used in various audio, video, security and safety electric systems.The working principle of fuses is relatively simple. The idea is that high levels of current must be able to pass through the device without being interrupted, which is prevented with the help of a fuse link. This link is thin and can burn easily, limiting current when it surpasses the maximum allowed quantity. 0251005.HAT1L fuse links are usually made of small slices of copper wire. The device is made to automatically disconnect or “blow” the power supply in the event of an unexpectedly high voltage or current. This prevents voltage and current damages to passive components and speakers.Due to its dimensions, the 0251005.HAT1L is approved in many countries. It is essential, however, that the fuse’s maximum voltage and current ratings specified by the manufacturer must be respected, as it could create safety risks connected with electric shock and fire.Fuses have been known since the 19th century, and the design of the 0251005.HAT1L has improved through the decades. Old fuses contained fusible metal wires, but now such an approach is considered highly dangerous, as it could cause an explosive reaction. Instead, 0251005.HAT1L uses a hollow cylinder design to allow for the automatic disconnection and removal from the power source.The 0251005.HAT1L can be used in multiple ways. For example, it could serve as the main switch for a circuit or as a supplementary protection against excessive currents. When the latter, it is located in parallel to the other components. When the 0251005.HAT1L is used as the main switch of a circuit, it obstructs the current flow to avoid short circuit in the main line and prevent other components from working.The 0251005.HAT1L can also be used to protect electrical devices from physical temperature increases caused by short-circuit failures. Short Circuit Protection (S, HP) enables the fuse to break the connection and stop the current when the temperature increases to dangerous levels. This prevents physical damages, as temperatures can melt insulation materials and spark or fume.It is not uncommon to see a combination of both short-circuit and overcurrent protection in one single fuse. When it is in maximum current protection mode, the 0251005.HAT1L automatically disconnects the power when the current passes the indicated threshold current, cutting off the electricity supply of the protected device. The 0251005.HAT1L allows for the protection of a range of electrical components, such as switches, connectors, power supplies, motors, and various appliances. Even specialized equipment such as high-pressure steam generators require this type of protection.The 0251005.HAT1L is a reliable safety device that allows for a safe environment in multiple environments. When used correctly, this fuse ensures resistance to the effects of current, short circuits, and overcurrents, thus preventing electric injuries and possible damages to the protected equipment.

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