DNS38-M1L Semiconductor Fuse Link Overview
The GRL DNS38-M1L is a high-speed 800V DC semiconductor fuse link designed to protect power electronic circuits. It acts as an industrial fuse in DC systems, interrupting short circuits and overloads before sensitive devices are damaged. Compact yet rugged, this HRC (High Rupturing Capacity) fuse link safeguards inverters, semiconductor modules, and battery systems across industries. It is widely used in rail transit, electric vehicle (EV) power systems, renewable energy power stations, communication, and other industrial equipment. By combining fast interruption and high breaking capacity, the DNS38-M1L provides reliable circuit protection and fuse safety in demanding environments.
DNS38-M1L Semiconductor Fuse Link Features
DNS38-M1L Semiconductor Fuse Link Advantages
1、Fast, High-Speed Protection
The DNS38-M1L is a fast-acting fuse that interrupts fault currents in milliseconds. Its high breaking capacity (50 kA) and current-limiting action clear short circuits extremely quickly, protecting sensitive power electronics. In fact, GRL designs semiconductor fuse links like this to melt (blow) in only ~10 ms at about 5–6× their rated current.
2、High-Reliability HRC Fuse
As a high rupturing capacity (HRC) fuse link, it uses a rugged silver/copper element that limits arc energy during faults. This precise element design provides consistent protection without nuisance trips. The result is a long service life and high fuse safety, ensuring equipment stays protected and maintenance costs stay low.
3、Harsh-Environment Durability
Built for industrial use, the DNS38-M1L withstands extreme conditions. It tolerates mechanical shocks, vibration, moisture, and wide temperature swings.
This makes it suitable as a rail transit fuse or EV fuse in moving vehicles, as well as for stationary installations like power plants and energy storage units. Its reliable operation under stress minimizes downtime in critical systems.
4、Easy Installation
The standardized φ38 mm cylindrical form factor and M10 mounting studs make the DNS38-M1L easy to install or replace. The compact design saves space in control panels and power modules. End users appreciate the simple installation and consistent fuse specification across the series, which speeds up maintenance.
5、Cost-Effective Protection
By meeting international standards and carrying CCC, CE, and TUV marks, the DNS38-M1L offers a globally approved solution. It delivers high-end circuit protection and compliance at an economical price point. Manufacturers and system integrators benefit from its balance of performance and value, especially in applications like inverters, battery backup systems, and industrial drives.
DNS38-M1L Semiconductor Fuse Link Applications
DNS38-M1L Semiconductor Fuse Link Maintenance Tips
For safe, long-term operation, inspect and maintain the fuse links periodically. Ensure that the fuse holder and terminals are clean, free of corrosion, and undamaged. Verify that the mounting hardware (M10 studs) is secure and tight. Use a multimeter to test the fuse element as described above– this will verify the fuse is still intact. Replace any fuse that shows a blown condition or any signs of overheating. Because semiconductor fuses can age or degrade after severe fault events, regular inspections and testing are recommended to maintain reliability. Always use a DNS38-M1L fuse with the same current rating and specifications when replacing a blown unit.
Download Datasheet
For complete technical details and the latest fuse specifications, please download the GRL DNS38-M1L Datasheet. This datasheet (PDF) includes full performance curves, dimensions, and installation guidelines. Contact our sales team or local distributor to discuss pricing, availability, and application support.
DNS38-M1L Semiconductor Fuse Link FAQs
How does a semiconductor fuse work?
A semiconductor fuse link operates like a specialized high-speed cartridge fuse. It contains a thin, notched metal strip that normally conducts current. If a short-circuit or overcurrent occurs, this strip heats up and melts very quickly at the notches, creating small electric arcs that rapidly extinguish and interrupt the current. In essence, the melting of the element breaks the circuit in a few milliseconds. This rapid action protects sensitive devices (like thyristors or IGBTs) from damage. Because of this fast response, semiconductor fuses are much quicker than general-purpose fuses, making them ideal for protecting power electronics.
How to check a semiconductor fuse?
Always ensure power is off before inspecting fuses. The simplest check is with a multimeter set to measure resistance (ohms). Touch the meter probes to each end of the fuse link. An intact fuse will show very low resistance (close to 0 Ω), indicating continuity.
If the fuse has blown, the meter will read “OL” (open loop) or infinite resistance, meaning no continuity. In that case, replace the DNS38-M1L with a new fuse of the same rating. Regular testing with a meter ensures fuse safety, as it confirms the fuse element is intact.
