DNT1-R1N Series: High-Speed aR Class Semiconductor Fuse for 1000V DC Systems
The DNT1-R1N series represents the latest innovation in power circuit protection, specifically engineered as an aR-class high-speed fuse dedicated to safeguarding sensitive semiconductor devices in high-voltage DC environments. This series boasts a superior 1000V DC rated voltage and covers a crucial current spectrum from 160A up to 550A. Designed to interrupt catastrophic short-circuit faults with minimal delay, the DNT1-R1N is the ideal defense line for components like IGBTs, MOSFETs, and thyristors, ensuring system integrity and extended device lifespan. With a high interrupting capacity of 50kA, the fuse guarantees robust performance under the most severe fault conditions.
Essential Technical Specifications
The DNT1-R1N fuse is built on a foundation of critical performance metrics required by advanced power electronics:
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Model Identification: DNT1-R1N Series
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Protection Class: aR Class – Indicating ultra-fast, short-circuit protection capability.
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Voltage Rating: 1000V DC – Specifically optimized for high-voltage direct current applications.
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Current Range: Available in a wide selection, including 160A, 200A, 250A, 315A, 400A, 500A, and 550A.
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Interrupting Rating: 50kA – Ensures reliable and safe fault current clearance at maximum rated voltage.
Superior Current Limiting Performance
The most vital characteristic of the DNT1-R1N is its superior current-limiting performance. The design achieves an exceptionally low I-squared-t (I²t) value. This low let-through energy is paramount because it restricts the total thermal energy deposited into the protected semiconductor device during a fault. By limiting the peak current and response time, the DNT1-R1N prevents damage that could otherwise lead to thermal destruction or junction failure of high-value components.
Mission-Critical Applications
The rapid response and DC voltage rating of the DNT1-R1N series make it an indispensable solution across numerous demanding power systems:
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Renewable Energy: Protection of DC bus links, inverters, and converters in large-scale Solar PV arrays and Wind Energy systems.
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High-Power DC Systems: Integration into Battery Energy Storage Systems (BESS), DC power distribution panels, and high-voltage DC transmission equipment.
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Electric Vehicle (EV) Infrastructure: Core safety component within DC Fast Charging stations and high-power onboard chargers.
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Industrial Drives and Power Quality: Used to protect the input and output stages of Variable Frequency Drives (VFDs) and large Uninterruptible Power Supplies (UPS).
Distinctive Features and Reliability
The DNT1-R1N is designed for ease of integration, maximum efficiency, and longevity:
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Optimized DC Quenching: Specialized internal materials and construction ensure robust and stable arc extinction at 1000V DC, where current zero-crossing does not naturally assist interruption.
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High Thermal Stability: Engineered to withstand the thermal cycling and continuous high temperatures typical of power electronic cabinets without premature degradation.
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Secure Installation: Features a robust bolt-down termination design for excellent mechanical stability, low contact resistance, and efficient heat transfer.
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Comprehensive Coverage: A single product series provides protection solutions across a wide array of current ratings, simplifying selection and logistics.
Partner with Us for Advanced DC Protection
Don’t compromise the safety and performance of your high-voltage DC power electronics. The DNT1-R1N 1000V DC High-Speed Semiconductor Fuse offers the precision and reliability your system demands. Contact our technical team today for detailed data sheets, expert sizing guidance, and tailored consultation for integrating the optimal protection solution into your next 1000V DC project.
