DNT1-R1R Series: The Leading aR Class High-Speed Semiconductor Fuse (1000V DC)
The DNT1-R1R series is a state-of-the-art aR-class high-speed semiconductor fuse, engineered for crucial protection in today’s demanding high-voltage DC power electronics. With an impressive 1000V DC rating and covering a versatile current range from 160A to 550A, the DNT1-R1R is the definitive solution for safeguarding sensitive components such as IGBTs, thyristors, and power diodes. Its primary function is to provide ultra-fast isolation during short-circuit faults, minimizing the destructive energy before it can damage valuable devices. Backed by a high interrupting capacity of 50kA, this fuse ensures robust and reliable performance across mission-critical applications.
Essential Technical Specifications
The DNT1-R1R fuse is built to meet and exceed the rigorous performance demands of modern DC systems:
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Model Identification: DNT1-R1R Series
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Protection Class: aR Class – Signifying rapid, non-delay action optimized for short-circuit protection.
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Voltage Rating: 1000V DC – Specifically designed for stable and reliable operation in high-voltage DC circuits.
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Current Range: A wide selection of ratings including 160A, 200A, 250A, 315A, 400A, 500A, and 550A.
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Interrupting Rating: 50kA – Guaranteeing safe and effective fault current clearance up to 50,000 Amperes.
Superior Current Limiting and I²t Performance
The most critical feature of the DNT1-R1R is its exceptional current limiting capability. The fuse is meticulously engineered to achieve an ultra-low I²t value. This parameter, the melting integral, is the measure of the thermal energy that passes through the circuit during the fuse’s clearing time. By minimizing the I²t, the DNT1-R1R effectively prevents the fault current’s thermal impact from exceeding the withstand capability of the protected semiconductor device, thereby ensuring the longevity and reliability of the entire power stack.
Key Application Environments
The high-speed, high-DC-voltage characteristics of the DNT1-R1R make it vital for safety and performance across several key sectors:
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Renewable Energy: Protection for the DC links and inverters in large-scale Solar PV Farms and Wind Power Converters.
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Energy Storage: Essential safety integration within Battery Energy Storage Systems (BESS), protecting high-current DC collection and distribution buses.
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E-Mobility: Critical safety component used in DC Fast Charging equipment and electric vehicle high-power systems.
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Industrial Power Quality: Protection for the input and output rectifier/inverter stages of high-power VFDs (Variable Frequency Drives) and UPS (Uninterruptible Power Supplies).
Distinctive Features and Reliability Benefits
Choosing the DNT1-R1R series translates directly into enhanced system reliability and reduced maintenance complexity:
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Dedicated DC Design: Specialized internal components ensure stable arc quenching and superior interruption performance specifically at 1000V DC.
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Fastest Response: The aR-class speed ensures fault currents are cleared faster than the thermal response time of most power modules.
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Robust Construction: Features a bolt-down mounting design for high contact pressure, ensuring minimal power loss, superior thermal transfer, and high resistance to vibration.
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Simplified Logistics: The broad current coverage (160A to 550A) within the DNT1-R1R series streamlines ordering and inventory management for diverse power system requirements.
Partner with Us for Advanced Protection
Ensure the highest level of safety and operational uptime for your high-value power electronic assets. The DNT1-R1R 1000V DC High-Speed Semiconductor Fuse is your choice for uncompromising protection. Contact our engineering specialists today for detailed technical specifications, precise I²t selection curves, and expert guidance on integrating the optimal protection solution into your 1000V DC system.
