280MMT

Applications:	Electrical, Industrial
Melting I²t:	6600
Size / Dimension:	4.449" L x 1.500" W x 3.268" H (113.00mm x 38.00mm x 83.00mm)
Package / Case:	Rectangular, Blade
Mounting Type:	Bolt Mount
Breaking Capacity @ Rated Voltage:	200kA
Operating Temperature:	--
Approvals:	UR
Class:	--
Features:	--
Series:	MMT
Response Time:	--
Voltage Rating - DC:	500V
Voltage Rating - AC:	690V
Current Rating:	280A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

The 280 MTT series fuses are thermally activatible fuses used in various industrial and commercial applications. These fuses are designed to protect sensitive electronic devices or circuits from excessive current conditions which can result in electrical fire hazard or damage to the circuits and equipment. In a properly designed electrical system, the 280MTT series fuses provide short-circuit protection along with superior performance characteristics.

Types of 280MTT Fuses

The 280MTT series fuses are available in two basic types: fuse-links and fuse-holders. Fuse-links are designed to be mounted directly on the equipment being protected. Fuse-holders are designed to mount on the circuit board and allow easy replacement of the fuses.The 280MTT fuse-links come in various current ratings ranging from 5 to 125A and with a variety of time-current characteristics. The fuse-holders offer superior protection against overloads and short-circuits and can incorporate either standard or high-current ratings.

Application

The 280MTT fuses are used in many different applications. Industrial control panels, motor control centers, HVAC equipment, computers, electronic equipment, power supplies, telecom systems, and communication systems are some of the common applications of these fuses.The 280MTT series provides superior performance characteristics over conventional fuse designs. They are designed to respond quickly and accurately to over-current conditions, providing superior protection of sensitive electronic devices and circuits.

Working Principle

The 280MTT fuses are equipped with two thermal elements that activate upon detecting an overload condition. The first element is a silver-nickel alloy strip that melts to open the fuse contact. The second element is a bimetallic strip that opens the fuse contact if the overload is not excessive but prolonged.The thermal elements in the series are designed to provide fast response time to shorts, yet high overload survivability to prolonged overcurrents. This ensures maximum protection against both electrical surges and prolonged overloads.The 280MTT fuses are designed to be maintenance-free, and do not require periodic maintenance or replacement. This adds to the safety of the system, as no control of fuse current ratings is necessary.

Conclusion

The 280MTT series fuses are thermally activatible fuses used in various industrial and commercial applications. The 280MTT series offers superior performance characteristics over conventional fuse designs and provides fast response time to shorts, yet high overload survivability to prolonged overcurrents. This ensures maximum protection against both electrical surges and prolonged overloads. The 280MTT fuses are designed to be maintenance-free and provide excellent protection of sensitive electronic devices and circuits from excessive current conditions.

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