1970500000

Response Time:	Medium
Size / Dimension:	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Color:	--
Operating Temperature:	-25°C ~ 70°C
Approvals:	cUL, UL
Melting I²t:	0.19
Breaking Capacity @ Rated Voltage:	35A
Mounting Type:	Holder
Package / Case:	5mm x 20mm
Series:	197
Voltage Rating - AC:	250V
Current Rating:	500mA
Fuse Type:	Cartridge, Glass
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Fuses

Fuses have been used by electricians and electrical engineers since the early days of electricity. A fuse is a safety device which, when an overload or fault occurs, will open the circuit to protect it from damage. The fuse also prevents an overload from occurring in the first place by limiting the amount of current which can flow through the circuit. The purpose of fuses is to protect electrical equipment from damage due to overloads and short circuits. Fuses are available in two basic types: thermal and magnetic. Thermal fuses open the circuit when the temperature inside the fuse reaches a certain level, while magnetic fuses open the circuit when a certain level of current is detected in the circuit. The two main types of fuses used in industry today are the standard (time-delay) fuse and the fast-acting fuse. The standard type is designed to open if the overcurrent continues for a certain period of time. It also has a time delay to allow for short duration overloads to occur without removing power. The fast-acting type opens if the overcurrent is detected, regardless of how long it lasts. There are some applications for which a different type of fuse is needed. These applications are mainly automotive, where the high-current short-duration pulses produced by exploding fuel can cause regular fuses to fail quickly. For these applications, special high-speed fuses orrelays are used. In the past, fuses were typically made with wires or strips of metal wire, but today they have been replaced almost completely by newer technologies such as solid-state integrated circuits. These newer technologies are much more reliable and can handle higher currents and faster switching times. The working principle of a fuse is relatively simple. When there is an overload or short circuit in the circuit, the current flowing through the fuse increases to a level that is too high for the fuse to handle. This increases the temperature of the fuse, and the temperature rises until the fuse element melts, opens the circuit and interrupts the current flow, thus protecting the rest of the circuit from damage. The size of a fuse is usually related to its breaking capacity, which is the maximum current that the fuse can handle before it opens the circuit. The breaking capacity is usually indicated with a number followed by the letter “A”, for example, 5A. This means that the fuse is able to handle a current of up to 5 Amps before it opens the circuit. In summary, fuses are important safety devices used in electrical circuits to prevent damage caused by overcurrents, short circuits, and other electrical hazards. They are available in both thermal and magnetic types, and can be made of either metal or solid-state integrated circuits. The working principle of a fuse is simple – when the current try to exceed the fuse rating, the fuse element melts and interrupts the circuit, protecting the rest of the circuit from damage.

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Part Number	Manufacturer	Price	Quantity	Description