NH3M400

Response Time:	Fast
Size / Dimension:	2.953" L x 3.440" W x 2.830" H (75.00mm x 87.37mm x 71.88mm)
Package / Case:	Rectangular, Blade
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	120kA AC, 25kA DC
Operating Temperature:	--
Approvals:	VDE
Class:	NH
Features:	Indicating
Applications:	Motor Protection
Series:	--
Voltage Rating - DC:	440V
Voltage Rating - AC:	500V
Current Rating:	400A
Fuse Type:	Square
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction The NH3M400 is a type of specialty fuse widely used in the electrical industry. It is designed for voltage protection in circuits up to 600V and interrupting current up to 400A. In addition to its high amperage capability, the NH3M400 also has high surge current capability. This makes the NH3M400 suitable for many electrical applications without having to worry about fuse failure.Application Field The NH3M400 is typically used in industrial and commercial applications where a high degree of voltage and current protection is needed. Examples of applications include lighting systems, high voltage transmission systems, industrial plant equipment, power distribution systems, high-speed data circuits, and other high amperage electrical systems. It is also widely used in military and aerospace applications due to its low failure rate and high surge protection capabilities.Working Principle The NH3M400 operates on the same principle as traditional fuse designs. When the current load exceeds the fuse’s rated capacity, an electromagnet releases and breaks the internal connections. This interrupts the flow of current, protecting the circuit from damage.The NH3M400 is designed to withstand high surge current and repetitive surges. It is also designed to react quickly to interrupt high current flows and minimize secondary damage to the circuit and equipment.The NH3M400 fuse features an outer housing made of thermoplastic material, making it highly durable and resistant to vibration and environmental conditions. Inside the housing, the fuse has a dual-layer design consisting of a silver-plated copper conductor and a current limiting screen. The silver plating prevents arcing and increases the interrupting capacity of the fuse.Conclusion The NH3M400 is a versatile, durable, and reliable fuse for many different electrical applications. Its fast reaction time and high current interruption limits make it an ideal solution for high surge protection. The internal design of the fuse ensures protection against arcing and short-circuit currents, making it suitable for a wide range of applications.

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