4574

Series:	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Fuseholder Type:	Block
Moisture Sensitivity Level (MSL):	--
Fuse Type:	Cartridge
For Use With/Related Products:	3AB, 3AG
Fuse Size:	1/4" Dia x 1 1/4" L (6.4mm x 31.8mm)
Number of Circuits:	1
Voltage:	250V
Current Rating:	30A
Mounting Type:	Chassis Mount
Orientation:	--
Termination Style:	Screw Terminal
Contact Material:	Spring Bronze
Contact Finish:	Tin

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Introduction

Fuseholders are devices used for protecting electrical systems from current overload. They are used in a variety of applications, ranging from industrial control systems to lighting systems. The most commonly used model of fuseholder, the 4574 series, is a fused enclosure that is designed to assist in the protection of electronic equipment from overloads and is suitable for both AC and DC applications.

4574 Series Fuseholder Overview

The 4574 series of fuseholders contains a variety of components ranging from 5 ampere single-pole fuses to 30 ampere quick-action fuses. The removal of a fuse requires the removal of the entire fuse cartridge with the terminal section remaining in the instrument housing. The 4574 series is designed for use in 240 volt AC and 24 volt DC circuits. It can accommodate miniature size 5 to 30 amp quick-action, fast-acting, or time delay type fuses.

4574 Application Field

The 4574 series fuseholder can be used in a wide range of applications, from industrial engine control to lighting protection. It can also be used in audio-visual equipment, security control systems, and fire alarm systems. It is also used in railway and automotive applications, as well as in avionics and tracking systems.

4574 Working Principle

The 4574 series fuseholder works on the principle of thermal-magnetic control. In the case of an overload, the thermal component of the fuse responds first, rapidly melting away to provide increased impedance and cutoff the current flow. As the thermal impedance increases, the magnetic component reacts to provide further current limitation. The magnetic action is slower than the thermal action, allowing some current flow to be maintained until the overload is cleared and the circuit protected. This action prevents short circuits, arcs, and other damage caused by current overload. The 4574 series fuseholder provides an effective current limitation system for the protection of electrical systems.

Conclusion

The 4574 series of fuseholders is designed for the protection of electronic equipment from overloads. It is suitable for both AC and DC applications and can accommodate miniature size 5 to 30 amp quick-action, fast-acting, or time delay type fuses. The 4574 series works on the principle of thermal-magnetic control, which prevents short circuits, arcs, and other damage caused by current overload. This fuseholder is used in a variety of applications, from industrial engine control to lighting protection, and is a valuable tool for protecting electrical systems.

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