Fuse link - NH00 UQ gR 63A/690V - ultra-fast 004331210

Professional protection for power electronics

The NH00 UQ gR 63A/690V fuse link is an advanced solution from the ULTRA-QUICK series by ETI POLAM, specifically designed to protect semiconductor elements in industrial applications. The gR characteristic provides full-range protection against both overloads and short circuits—crucial for the reliable operation of power electronic systems.

Operating parameters and technical characteristics

The device operates at a rated current of 63A and an AC voltage of 690V, allowing for use in medium-voltage industrial installations. The breaking capacity is 50kA for AC and 25kA for DC, demonstrating high resistance to fault currents. The breaking Joule integral of 3000 A²s defines the energy the fuse link can safely dissipate during short-circuit clearance.

Power losses of 20W are relatively low for this class of devices, resulting in lower heat dissipation during normal operation. The fuse link is equipped with a top indicator, which enables rapid identification of the device status—the installer can immediately see if the fuse link requires replacement.

Construction and safety standards

The product complies with the requirements of the IEC 60269-4 standard, which defines detailed requirements for fuses used in the protection of semiconductor devices. The NH00 size is a standard format for this class of devices, ensuring compatibility with a wide range of fuse bases available on the market.

The ETIM classification (EC000055) confirms its belonging to the category of professional NH fuse links. The standard construction minimizes the risk of accidental contact with live parts during installation or removal.

Applications and user benefits

The primary purpose is the protection of power electronic elements such as rectifier diodes, thyristors, or other semiconductor components used in electric drives, inverters, or switching power supplies. The gR characteristic ensures the device responds to both long-term overloads (typical of thermal damage) and sudden short circuits (dielectric damage).

Practical benefits include ease of status identification thanks to the top indicator and the standard NH00 size, which eliminates the need for specialized mounting hardware. Low power losses reduce operating costs by decreasing energy consumption converted into heat.

The product weighs 170g, and the EAN code 3838895732662 allows for easy product identification in warehouse and sales systems.