Siemens 3NA3817 NH Fuse Link Size 000 40A 500V

The Siemens 3NA3817 NH fuse link is a professional-grade electrical protection component engineered for industrial power distribution systems. Designed in the compact size 000 format, this fuse link offers a rated current of 40A and is suitable for systems operating at up to 500V AC. As a gG class device, it provides comprehensive protection against both overloads and short circuits, ensuring the integrity of electrical circuits and connected equipment in demanding environments.

Advantages

This fuse link stands out due to its robust construction and adherence to strict industrial standards, which guarantee consistent performance and long-term reliability. Its gG characteristic ensures a full-range breaking capacity, meaning it can safely interrupt currents from the lowest fusing current up to its maximum rated breaking capacity. The compact size 000 design allows for efficient space utilization within switchgear and distribution boards, while the high-quality materials used in its manufacturing contribute to excellent thermal stability and operational safety.

Suitable for

• Industrial electrical distribution boards
• Low-voltage power supply systems
• Protection of cable and line installations
• Switchgear and control gear assemblies

When it may not be suitable

This fuse link is not intended for use in high-voltage applications exceeding 500V AC. It is also not suitable for circuits requiring specialized protection characteristics other than the standard gG class, such as fast-acting protection for sensitive semiconductors.

Key specifications

• Size: 000
• Rated current: 40A
• Rated voltage: 500V AC
• Utilization category: gG
• Mounting type: NH fuse base

How to use

The Siemens 3NA3817 should be installed into a compatible NH size 000 fuse base or disconnect switch by qualified personnel. Ensure that the power supply is completely isolated before attempting to insert or replace the fuse link. Use an appropriate insulated fuse handle or extraction tool to safely seat the fuse into the contacts, ensuring a firm and secure connection to prevent overheating due to contact resistance.

What to consider before purchase

• Verify that the current rating of 40A matches your circuit requirements.
• Ensure the fuse base is compatible with the NH size 000 standard.
• Check that the system voltage does not exceed the 500V AC rating.
• Confirm that the gG protection class is appropriate for your specific application.

Usage recommendations

Always replace a blown fuse with one of the exact same type, current rating, and characteristics to maintain the safety and protection levels of your electrical system. Never attempt to repair or bypass a fuse link.