The DNR38-J1M is a heavy-duty fast-acting fuse link for power semiconductor protection. Part of the DNR series, it carries AC 690V / DC 500V at 160–400A. It delivers backup and short-circuit protection in the most demanding applications, such as large inverters, HVDC converters, traction systems and utility battery installations. Built with a large UL94 V-0 ceramic body, the DNR38-J1M provides high reliability and complies with strict safety standards.
| Specification and model | Size | In (A) | I2t(A2S) Pre-Arcing | I2t(A2S) Fusing | 0.5In Power dissipation (W) | 0.8In Power dissipation (W) | 1.0In Power dissipation (W) |
| DNR38-J1M-160A | 38 | 160A | 30600 | 102000 | 10 | 18.7 | 34.1 |
| DNR38-J1M-200A | 38 | 200A | 39000 | 122000 | 13.8 | 25.1 | 46.5 |
| DNR38-J1M-225A | 38 | 225A | 44900 | 145000 | 14.8 | 27.5 | 51 |
| DNR38-J1M-250A | 38 | 250A | 53600 | 173000 | 16.4 | 31.2 | 57.5 |
| DNR38-J1M-300A | 38 | 300A | 65000 | 200000 | 17 | 33.2 | 61.4 |
| DNR38-J1M-315A | 38 | 315A | 82200 | 242000 | 19.2 | 35.5 | 65.7 |
| DNR38-J1M-350A | 38 | 350A | 106000 | 280000 | 21.1 | 39.9 | 73.8 |
| DNR38-J1M-400A | 38 | 400A | 130000 | 340000 | 23 | 42.9 | 78 |
Ultra-Heavy-Duty Body: Extra-large ceramic cartridge with reinforced metal end caps, designed for very high current loads.
Fast-Acting Link: Precision fuse element that melts quickly to interrupt extreme fault currents.
Advanced Arc Suppression: Dense quartz sand filler effectively quenches arcs in high-power environments.
Rugged Construction: Engineered to withstand mechanical shocks, vibrations and high thermal stress.
Dual Compatibility: Rated for both AC and DC, suitable for grid and DC-bus protection.
Safety Certification: UL94 V-0 flame-retardant construction for maximum fire safety.
GRL Group
Massive Interrupting Power: Handles the highest fault currents (100 kA AC), essential for power station and grid applications.
Fast Protective Action: Rapid response to protect transformers, converters and semiconductor modules in critical systems.
Wide Deployment: Perfect for utility-scale inverters, transportation power systems, energy storage farms and industrial parks.
International Compliance: Meets IEC and domestic standards, backed by CE/CCC/TUV certification for global use.
V-0 Fire Safety: UL94 rated body and arc-resistant design protect infrastructure and personnel during faults.
Maintenance-Friendly: Bolt-in fuse design (M10) allows quick replacement even for very large systems.
Reliable Durability: High-quality materials and precise engineering ensure longevity and stability in heavy-use applications.
Utility-scale power inverters and substations
HVDC converter stations and transmission systems
Mass transit/rail traction power supplies
Large EV charging depots and battery backup facilities
Industrial power plants and factory automation
Grid energy storage and renewable energy farms
Heavy mining, marine power systems, and elevators
A heavy-duty fuse link like the DNR38-J1M protects critical power systems by interrupting fault currents. Under overcurrent, the fuse element melts, providing short-circuit and backup protection to prevent catastrophic failure of equipment.
Choose based on your system’s voltage (AC/DC) and load current. The fuse rating should exceed normal current but be lower than fault current. Ensure the fuse’s interrupt rating and type (aR) match your needs. Also account for environmental (ambient temperature, vibration) and mechanical requirements. Confirm that the fuse meets the necessary standards for your application.
Yes. DC systems do not have zero-crossings, so DC fuses often have higher voltage handling. The DNR38-J1M (AC690V/DC500V) demonstrates this. Always use a fuse specifically rated for AC or DC as required.
Click to view GRL LinkedIn >>
Click to view GRL YouTube>>
Product Categories
Quick Link
Contact Us
Optimized by Seraphinite Accelerator
