Package / Case:	0805 (2012 Metric)
DC Cold Resistance:	0.125 Ohms
Size / Dimension:	0.079" L x 0.049" W x 0.018" H (2.00mm x 1.25mm x 0.45mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	UL
Melting I²t:	0.004
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Surface Mount
Series:	MFU
Response Time:	Fast
Voltage Rating - DC:	32V
Current Rating:	1.25A
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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MFU0805FF01250P100 Application Field and Working Principle

Introduction to Fuses

Fuses are electrical devices designed to protect electrical devices from damaging over currents, short circuits, and other electrical hazards. Fuse operation is based on a simple electrical principle: when current flows through a circuit, there is a temperature rise generated due to the resistance of the circuit material. The purpose of fuses is to prevent electrical overloads, and protect electrical devices from potentially hazardous conditions. Fuses come in various shapes, sizes, and ratings, each designed for specific applications and electrical goals.

MFU0805FF01250P100 Introduction

The MFU0805FF01250P100 is a standard size fuse used in a variety of circuit Break, Over-Current, and Thermal Protections. The fuse is designed for protection of various kinds of electronic electrical equipment, such as electrical appliances, consumer electronics, and electrical/electronic products. The MFU0805FF01250P100 is set with an energy rating of 250V (max. rated voltage of the fuse) which includes over-voltage, short circuits, currents, and phase-wise currents. The maximum current rating for the fuse is 8A, with a minimum breaking capacity of 100A.

MFU0805FF01250P100 Application Field

The MFU0805FF01250P100 is well suited for a variety of applications, including automotive electronics, industrial electronics, consumer electronics, and medical devices. It is ideal to use for circuits where high current may be involved, and for protection against overvoltage and over-current conditions. The fuse can also be used in power equipment and supplies, television equipment, etc., as well as in equipment such as an electric oven, vacuum cleaner, electric fan, air-conditioner, etc.

MFU0805FF01250P100 Working Principle

The working principle of the MFU0805FF01250P100 is based on the simple concept of thermal expansion. When current is applied to the fuse, the resulting heat causes the fuse element to expand. This expansion increases the resistance of the fuse element, causing the current to be limited. At the same time, the fuse element is designed to melt when the current exceeds the rated current. This causes an open circuit, which cuts off the current to the equipment being protected. The amount of current required to open the fuse is known as the ‘fuse rating’ or ‘breaking capacity’.

Conclusion

TheMFU0805FF01250P100 is a standard size fuse designed for applications where over-voltage, over-current, and short circuit protection are necessary. The fuse is suitable for a variety of applications, including automotive electronics, industrial electronics, consumer electronics, and medical devices. The fuse operates based on the principle of thermal expansion, where an increase in current causes the fuse element to expand, thus limiting the current and eventually breaking the circuit.

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