5MTP 300

Package / Case:	5mm x 20mm (Axial)
DC Cold Resistance:	1.46 Ohms
Size / Dimension:	0.217" Dia x 0.827" L (5.50mm x 21.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, cULus
Melting I²t:	0.31
Breaking Capacity @ Rated Voltage:	35A
Mounting Type:	Through Hole
Series:	5MTP
Response Time:	Medium
Voltage Rating - AC:	250V
Current Rating:	300mA
Fuse Type:	Cartridge, Glass
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Fuses are important components of electrical systems that provide powerful protection against overcurrent and short-circuit faults. 5MTP 300 is one of the most common fuses used in overhead distribution systems. This article will provide a detailed overview of its application in high-voltage overhead distribution systems and its working principle.

Application Field

5MTP 300 is an overhead distribution fuse that is designed for electric transmission lines rated at 10 to 300 volts AC. It is used to protect systems from overcurrent, shorts circuits, as well as other faults. It has a low interrupting capacity of 5000 Amps at 300 Volts, which makes it suitable for overhead lines rated up to 300 amp. It features a thermal design that exceeds the latest ANSI standard requirements for overhead distribution line protection.The 5MTP 300 has a compact design with dimensions of 3.230" x 1.240" x 3.100" (L x W x H). It is suitable for mounting in a variety of overhead distribution systems such as single-phase transformers, sectioning cabinets, and pole mounted secondary disconnects. It is also suitable for use in duct banks, overhead line networks, transmission lines, and pole-line switches. It is also widely used in the power utilities, public works, or oil and gas industries.

Working Principle

The 5MTP 300 operates by the operation of a spring cartridge, which is filled with a material that melts at 140°C. When too much current flows through the fuse, the wire filament melts, causing the fusible material to expand and break open the spring cartridge. This prevents further current flow and protects the system from overcurrent, short circuits, or other faults.The melting of the wire filament also causes an electrical disconnection from the system, as the wire filament itself acts as the contact which helps to make the connection between the line and the fuse when the fuse is in its normal position. Once the fuse has been tripped, the contacts are disconnected, which stops the flow of electricity to the system.

Conclusion

The 5MTP 300 is an overhead distribution fuse widely used in high-voltage overhead distribution systems. It is designed to protect systems from overcurrent, shorts circuits, as well as other faults. It has a compact design, with dimensions of 3.230" x 1.240" x 3.100" (L x W x H). It is suitable for mounting in a variety of overhead distribution systems, such as single-phase transformers, sectioning cabinets, pole-mounted secondary disconnects, duct banks, overhead line networks, transmission lines, and pole-line switches. It operates by the operation of a spring cartridge filled with a material that melts at 140°C. It has a low interrupting capacity of 5000 Amps at 300 Volts, making it suitable for overhead lines rated up to 300 amp. It is widely used in the power utilities, public works, or oil and gas industries. In conclusion, the 5MTP 300 is a reliable and efficient fuse for overhead distribution systems, and its application and working principle are important to understand for efficient system operations.

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