045901.5ER

Series:	PICO® 459
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Fuse Type:	Board Mount (Cartridge Style Excluded)
Current Rating:	1.5A
Voltage Rating - AC:	125V
Voltage Rating - DC:	125V
Response Time:	Fast
Package / Case:	2-SMD, J-Lead
Mounting Type:	Surface Mount
Breaking Capacity @ Rated Voltage:	50A AC, 300A DC
Melting I²t:	0.65
Approvals:	CSA, UL
Operating Temperature:	-55°C ~ 125°C
Color:	--
Size / Dimension:	0.285" L x 0.170" W x 0.120" H (7.24mm x 4.32mm x 3.05mm)
DC Cold Resistance:	0.08 Ohms

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Fuses

045901.5ER application field and working principle

Fuses are one of the most commonly used protection components in various electrical circuits, which can automatically work to protect circuits from being damaged due to accidental or abnormal overvoltages. The 045901.5ER fuse is a branch circuit fuse and the national standard names it STV (Low Voltage Standard Branch Circuit Protective Fuse). This fuse is usually used for AC 50Hz/60Hz single-phase circuits with rated voltage of 230V/400V in Class I, II and III, and in circuits with a rated current of not more than 100A.

Working Principle

The 045901.5ER fuse mainly consists of an upper housing and a lower housing, in which several strips of fuse element are placed in the lower housing. The main fuse element is made of silver alloy that can provide overcurrent protection. Inside the fuse element, the stem is connected to the upper housing and forms a closed loop together with the fuse element. When the current goes through this loop, the high temperature generated by the current makes the fuse element melt and the current to be interrupted. Therefore, this fuse has certain overload protection and electric shock prevention effect.

Function of 045901.5ER Fuse

The 045901.5ER fuse is used as an overvoltage protection device in the single-phase AC circuit with a rated voltage of 230V/400V and a rated current of not more than 100A. Its main functions are as follows:(1) Overcurrent protection: it can cut off the current when the circuit encounters current or short circuit faults, so as to avoid equipment damage caused by high current.(2) Protection of personnel and equipment from electric shock: when the fuse encounters short circuits and other electricity faults, the fuse can cut off the current in time to protect personnel and equipment from electric shock.(3) Thermal protection: when the current of the circuit is too high, the fuse element can sense the temperature rise produced by the current, and when it reaches a certain temperature, the fuse element will melt and disconnect the current, thereby protecting the circuit from being damaged due to excessive current.(4) Arc suppression protection: when the fuse encounters overloads or short circuits, the arc between the fuse elements can reduce the fault current and also protect the circuit from damage.

Conclusion

In conclusion, the 045901.5ER fuse has good protective effect. It is widely used in single-phase AC circuit with a rated voltage of 230V/400V and a rated current of not more than 100A to protect the circuit from being damaged due to excessive current and short circuits, and to protect the equipment and personnel from electric shock.

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