043503.5KRHF

Series:	435
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:	3.5A
Voltage Rating - DC:	32V
Response Time:	Fast
Package / Case:	0402 (1005 Metric)
Mounting Type:	Surface Mount
Breaking Capacity @ Rated Voltage:	35A
Melting I²t:	0.3017
Approvals:	CSA, UL
Operating Temperature:	-55°C ~ 90°C
Color:	--
Size / Dimension:	0.039" L x 0.020" W x 0.013" H (0.99mm x 0.51mm x 0.33mm)
DC Cold Resistance:	0.0135 Ohms

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043503.5KRHF: Fuses Application Field and Working Principle

Fuses are integral components of electrical systems and are used to protect various circuits against damage due to overloads and short circuits. The 043503.5KRHF fuse is a high speed Class H type fuse specifically designed for high fault current rating. It is a combination of both current limiting and high speed characteristics and has a time-delay characteristic. This fuse is used for industrial applications such as motor protection, UPS systems, and control circuits.

Design and Structure

The 043503.5KRHF fuse is also known as a fast-acting Class H fuse and has a built-in high temperature thermistor for additional protection. It has a cylindrical shape with a blunt bottom and the terminals are crimped to the fuse body. The fuse is conformal coated for environmental protection and features a directly mounted single fuse for easy installation.

Application Field

The 043503.5KRHF fuse is a high speed Class H type fuse and primarily used for industrial applications such as motor protection, UPS systems, and control circuits. It is also used in applications such as power generation, petrochemical, semiconductor manufacturing, refinery operations, and renewable energy production.

Working Principle

The working principle of the 043503.5KRHF fuse is based on the rapid melting of the fuse element inside the fuse when an overloaded current passes through the fuse. When this overload occurs, the fuse element melts, causing an interruption in the current flow. Once the current has been interrupted, the fuse provides the necessary safety protection for the system.

Limitations

The 043503.5KRHF fuse has a few limitations that should be taken into consideration before purchasing and installing it. It has a maximum operating temperature of 95°C which makes it unsuitable for applications that require higher temperature protection. Additionally, it is not suitable for use in applications where a high inrush current can occur such as applications involving inductive loads. Furthermore, the fuse must be rated for the system voltage and current requirements and should not be used if the current rating of the fuse is exceeded.

Conclusion

The 043503.5KRHF fuse is a high speed Class H type fuse specifically designed for high fault current rating. It is primarily used for industrial applications such as motor protection, UPS systems, and control circuits. The working principle of the fuse is based on the rapid melting of the fuse element when an overloaded current passes through the fuse. Its limitations include a maximum operating temperature of 95°C and limited use in applications involving inductive loads. Before purchasing and installing this fuse, be sure that it is rated for the system voltage and current requirements and that it is not used if the current rating of the fuse is exceeded.

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