Response Time:	Slow
Size / Dimension:	0.606" L x 0.211" W x 0.211" H (15.40mm x 5.35mm x 5.35mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	cURus, VDE
Melting I²t:	99
Breaking Capacity @ Rated Voltage:	1.5kA
Mounting Type:	Surface Mount
Package / Case:	2-SMD, Square End Block
Series:	UMT-H
Voltage Rating - DC:	125V
Voltage Rating - AC:	277V
Current Rating:	5A
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Cut Strip

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3403.0281.11 Application Field and Working Principle

Introduction to Fuses

A fuse is a type of electrical protection device that controls and limits the amount of current in an electrical circuit. Fuses are designed to open and break the flow of electricity when the current exceeds a predetermined level. This prevents electrical fires caused by circuits being overloaded with excess current. Fuses can be used in almost any electrical circuit, from residential applications to industrial applications.Fuses can be divided into two categories: time-delay fuses and current-limiting fuses, also known as fast-acting fuses. Time-delay fuses are designed to allow a brief spike in current before breaking the circuit. Current-limiting fuses (also called fast-acting fuses) are designed to quickly interrupt the flow of current when a pre-established current limit has been exceeded.

3403.0281.11 Application Field and Working Principle

The 3403.0281.11 fuse is a current-limiting fuse, also known as a fast-acting fuse. It is part of Bussmann\'s Cooper Bussmann Series 3403 low-voltage power fuses.The 3403.0281.11 fuse is designed to protect medium voltage applications of 500.0 A. It is UL Recognized Class RK5 with a voltage rating of 600VAC/250VDC.The 3403.0281.11 fuse operates by a principle known as “current limiting”. This means that when the current within a circuit exceeds the rated value, the fuse will quickly interrupt the flow of current. This is important for preventing electrical fires caused by overloaded circuits.The 3403.0281.11’s protective features extend beyond current-limiting. It also has a picking-resistant armature that prevents the fuse from being reopened after it has blown, and it has an indicator light which allows for handy verification of whether or not the fuse has blown.Finally, the 3403.0281.11 is made of a zinc-plated steel frame and a silver-nickel alloy link, providing it with a high degree of durability and corrosion resistance.

Conclusion

The 3403.0281.11 fuse is a fast-acting, current-limiting fuse that is designed to protect medium voltage circuits of up to 500.0 A. It has a voltage rating of 600VAC/250VDC, and it has features such as a picking-resistant armature, an indicator light, and a zinc-plated steel frame and silver-nickel alloy link. All of these features make the 3403.0281.11 fuse an ideal choice for applications requiring reliable electrical protection.

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