GRL DNS51-O1L Semiconductor Fuse Link 800V Factory Direct Sales

DNS51-O1L Semiconductor Fuse Link Overview

The GRL DNS51-O1L is a high-performance fuse link specifically designed for the protection of semiconductor equipment. With a rated voltage of 1000V DC and a current rating ranging from 200A to 500A, this fuse ensures reliable short-circuit and overload protection in demanding applications. It is engineered to meet international standards including GB/T 13539.4 and IEC 60269-4, and carries certifications such as CCC, CE, and TUV.

DNS51-O1L Semiconductor Fuse Link Technical Parameters

High Breaking, Low Dissipation: DNS51-O1L Semiconductor Fuse for Optimized Safet

• High Breaking Capacity: Capable of interrupting up to 50kA, ensuring safety in high-fault scenarios.

• Strong Current Limitation: Effectively limits peak current and energy let-through, protecting sensitive semiconductor components.

• Compact Design: Optimized for space-constrained installations without compromising performance.

• Low Power Dissipation: Reduces heat generation, enhancing system efficiency and longevity.

• Robust Construction: Built to withstand mechanical vibration and current shocks.

DNS51-O1L Semiconductor Fuse Link Applications

The advantages of the DNS51-O1L Semiconductor Fuse Link

The DNS51-O1L offers superior reliability and durability, even under harsh operating conditions. Its advanced arc-extinguishing capability and precise time-current characteristics ensure fast and selective tripping, minimizing downtime and equipment damage. The fuse is also easy to install and maintain, supporting screw mounting with specified torque settings for secure connections.

• ✅ aR Protection Category: Ideal for semiconductor and rectifier protection.

• ✅ Wide Current Range: Covers 200A to 500A for versatile application coverage.

• ✅ DC Rated: Specifically designed for DC systems up to 1000V.

• ✅ International Certifications: Compliant with global safety and quality standards.

DNS51-O1L Semiconductor Fuse Link FAQs

Q1:The rated voltage of DNS51-O1L is 1000V DC and it belongs to the aR protection category. What does this mean for the protection of the photovoltaic inverter? Does it comply with international standards to ensure it can be used in export projects?

1. 1000V DC & aR Category: This means the DNS51-O1L is engineered specifically for high-voltage DC systems. The “aR” (partial-range breaking capacity) category is crucial, indicating that this fuse offers extremely fast short-circuit response. It can interrupt very high fault currents (with a breaking capacity of 50kA) in a matter of milliseconds, effectively protecting expensive semiconductor components like IGBTs. In PV inverters, where DC-side fault currents rise extremely rapidly, the rapid current-limiting protection of the aR category is essential to prevent catastrophic failure of the inverter’s core components.

2. International Standards & Certifications: Yes, it fully meets your export requirements. The DNS51-O1L is strictly designed in accordance with international standards GB/T 13539.4 and IEC 60269-4 and carries authoritative certifications like CE and TUV. These certifications confirm that the product not only meets international performance benchmarks but also complies with the safety and EMC requirements of the EU and other high-end markets, making it perfectly suitable for global photovoltaic projects.

Q2:It is noted that the rated voltage of DNS51-O1L is 1000V DC and it belongs to the aR protection category. This is particularly relevant for applications in energy storage systems (ESS) where the installation space is limited and there is significant vibration. How is DNS51-O1L designed in terms of its mechanical structure and heat dissipation to ensure the reliability and stability of long-term connection?

1. Robust Mechanical Construction: It uses a ceramic square body as the arc-extinguishing medium. This material offers excellent insulation and arc-resistant properties, along with high mechanical strength to withstand significant vibration and shock, making it ideal for dynamic environments like ESS containers and rail transit.

2. Optimized Heat Dissipation & Power Loss: As you can see in the product parameter table for “Power Dissipation” (typically in the tens of watts at rated current), we have optimized the fuse element design and materials to minimize heat generation during normal operation. This reduces its thermal impact on surrounding components in compact spaces, thereby enhancing the overall thermal stability and lifespan of your system.

3. Reliable Connection Method: It utilizes a bolt connection (e.g., M10) with a specified tightening torque (e.g., 21±1 N.m). This ensures minimal and stable contact resistance, preventing overheating caused by loose connections and guaranteeing long-term electrical reliability.

Q3:Compared to other brands of general-purpose fuses on the market, the price of DNS51-O1L is higher. From the perspective of investment return, why is it worth purchasing?

1. Protecting Critical Assets: The core value of a PV inverter or storage converter is tens or even hundreds of times the price of a fuse. The precise protection and ultra-fast breaking capability of the DNS51-O1L act as an “insurance policy” for this expensive equipment. A single successful protection event can prevent tens of thousands in equipment replacement costs and weeks of project downtime.

2. Reducing Total Cost of Ownership (TCO): A general-purpose fuse might perform adequately for standard overloads but could fail to operate quickly enough for the high-energy faults typical in semiconductor circuits. This can lead to “cascading failures” or protection failures, causing widespread system downtime. The precision of the DNS51-O1L minimizes false trips and prevents fault escalation, enhancing overall system availability and indirectly increasing power generation revenue.

3. Maintenance Cost Advantage: Due to its high reliability and stability, you avoid frequent replacements and the hidden costs associated with troubleshooting performance degradation in lesser-quality fuses, saving on long-term maintenance and operational expenses.