Hager LNH40400M NH4a Fuse Link 400A 500V gG

The Hager LNH40400M is a professional-grade NH4a size fuse link engineered for robust electrical protection in industrial environments. Designed to handle a rated current of 400A and a voltage of 500V, this component features a gG characteristic, making it suitable for general-purpose protection against both overloads and short circuits. Its reliable construction ensures consistent performance in demanding electrical distribution systems, contributing to the overall safety and operational integrity of the installation.

Advantages

This fuse link offers exceptional reliability and durability, essential for maintaining continuous power supply in industrial settings. The gG characteristic provides a versatile protection profile that effectively manages various fault conditions. Its standardized NH4a size ensures compatibility with a wide range of industrial fuse bases, simplifying maintenance and replacement processes. By utilizing high-quality materials, the Hager fuse link minimizes the risk of unexpected downtime and protects sensitive downstream equipment from electrical surges.

Suitable for

• Industrial electrical distribution boards
• Power supply protection in manufacturing facilities
• Overload and short-circuit protection for heavy-duty machinery
• Electrical infrastructure requiring reliable gG class protection

When it may not be suitable

This fuse link is not intended for use in residential low-voltage circuits or applications requiring specialized characteristics such as aR for semiconductor protection. It is also unsuitable for environments where the voltage exceeds 500V or where the current requirements are significantly lower or higher than the 400A rating.

Key specifications

• Fuse size: NH4a
• Rated current: 400A
• Rated voltage: 500V
• Characteristic: gG
• Width: 98 mm
• Height: 200 mm

How to use

The fuse link should be installed by a qualified electrician into a compatible NH4a fuse base. Ensure the power is completely disconnected from the circuit before attempting installation or replacement. Align the fuse blades with the contacts of the fuse base and press firmly until it is securely seated. Always use appropriate insulated tools and personal protective equipment when handling electrical components to prevent injury.

What to consider before purchase

• Verify that the fuse base is compatible with the NH4a size.
• Ensure the 400A rating matches the requirements of your electrical circuit.
• Check that the system voltage does not exceed the 500V limit.
• Confirm that the gG characteristic is appropriate for the specific protection needs of your application.

Usage recommendations: Regularly inspect the fuse base for signs of heat damage or corrosion to ensure optimal contact. Replace the fuse link immediately if it has tripped, and always use an identical replacement to maintain the integrity of the protection system.