GRL DNT3-R1L: Critical Protection Barrier for 1000V DC Systems (315A–1100A)
I. Product Positioning and Performance Core
The GRL DNT3-R1L Ceramic Semiconductor Fuse Link is an aR-class ultra-fast protective component designed specifically for high-power DC circuits. It is dedicated to solving the complex protection challenges posed by the confluence of high current and high DC voltage in modern energy storage and industrial converter applications.
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Voltage & Capacity: It is rated for 1000V DC, with an expansive current coverage ranging from 315A up to 1100A, meeting the protection needs of large DC buses and main power modules.
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Interruption Assurance: It features a reliable 50kA interrupting capacity, ensuring that the fuse can safely and effectively isolate a fault, even under high-fault current conditions.
II. Critical Selection Factor: I²t and Semiconductor Coordination
In the high-current arena of 315A to 1100A, precise protection coordination forms the foundation of system reliability. The DNT3-R1L’s design is fundamentally focused on the strict control of the melting integral (I²t).
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Ultra-Low I²t Value: As an aR-class fuse, the DNT3-R1L clears the fault current in milliseconds, minimizing the total I²t passed through the circuit.
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Protection Objective: The extremely low I²t value is crucial for protecting expensive IGBTs and thyristors. It guarantees that the thermal energy absorbed by the fuse during a fault remains far below the component’s withstand limit, preventing device destruction.
III. Featured Advantages: High Current and DC Performance
The DNT3-R1L’s structure is optimized for high-power DC applications:
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High Current Density Design: Internal components are optimized to ensure minimal Power Dissipation (I-squared-R loss) and that the temperature rise is controlled during continuous 1100A operation.
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Ceramic Construction: The ceramic barrel provides superior mechanical strength and insulation, aiding rapid heat dissipation and highly effective arc extinction at 1000V DC.
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Target Applications: Widely utilized in large-scale Battery Energy Storage Systems (BESS), the DC side of centralized Solar PV Inverters, and high-power industrial converters.
Obtain Your Precise Protection Solution
To ensure your 1000V DC, 315A–1100A system receives optimal protection, correct fuse selection is paramount. Please contact our GRL specialist team immediately to receive detailed technical specifications, I²t characteristic curves for the DNT3-R1L series, and a customized protection coordination plan.
