5STP 4-R

Package / Case:	5mm x 20mm (Axial)
DC Cold Resistance:	0.014 Ohms
Size / Dimension:	0.217" Dia x 0.827" L (5.50mm x 21.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CCC, CE, CSA, cURus, IMQ, SEMKO, VDE
Melting I²t:	56
Breaking Capacity @ Rated Voltage:	40A
Mounting Type:	Through Hole
Series:	5STP
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	4A
Fuse Type:	Cartridge, Glass
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to 5STP 4-R

Fuses are an important part of electrical safety systems, and the 5STP 4-R is an advanced type of fuse designed for a special purpose. In this article, we will discuss 5STP 4-R application fields and working principles to help readers understand its capabilities.

Application Fields

The 5STP 4-R is a general-purpose fuse that is designed for circuit protection in commercial, industrial, and residential applications. The 5STP 4-R is designed for use with three-phase power systems up to 240 volts. It is suitable for both AC and DC applications and is designed with a series of chambers and a different fuse element for each chamber. The 5STP 4-R can protect a circuit from up to 30 amps on each phase. The 5STP 4-R is a dual-element time-delay fuse, meaning it has two elements in each chamber, one element provides overcurrent protection and the other provides overcurrent and overload protection. The fuse has a thermal cut-off device that protects the fuse from excessive temperatures. The 5STP 4-R also has built-in surge protection, which protects the device from momentary power surges.

Working Principle

The 5STP 4-R utilizes a dual-element time-delay design. The two elements are typically separated by either a resistor or a resistor-capacitor combination. The resistor element is designed to respond to primary surges and also offers a small degree of current limiting. The second element is designed to respond only to sustained overcurrents or surges and only after the primary surge is removed.When an overcurrent condition occurs, the fuse\'s thermal cut-off device will act to disconnect the circuit and prevent further damage.This is followed by the second element, which will respond to the sustained overcurrent or surge and subsequently melt, opening the circuit. The time delay feature of the 5STP 4-R ensures that it won\'t blow immediately when responding to transients or momentary spikes in current but will wait until the current has been sustained for some time.The 5STP 4-R is equipped with surge protection that protects the device during power surges or momentary current spikes.The surge protection acts as an additional layer of safety and ensures that the fuse won\'t blow prematurely in response to momentary spikes.

Conclusion

The 5STP 4-R is a general-purpose fuse designed for use in circuit protection of residential, commercial, and industrial applications. It is designed to provide both overcurrent and overload protection and also has a thermal cut-off device that will disconnect the circuit in the event of an excess temperatures. The 5STP 4-R also has inherent surge protection, which serves to protect the device during power surges and momentary current spikes. It has a dual-element time-delay design, which ensures that the fuse won’t blow immediately when responding to transients or momentary spikes in current but will wait until the current has been sustained for some time.

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