Semiconductor Fuse Overview
The GRL DNT000-M1M is a high-speed ceramic semiconductor fuse designed for DC power applications at 800 V. It is specifically tailored for engineers and procurement specialists who require reliable, fast-acting protection for power electronics. The DNT000-M1M interrupts fault currents within milliseconds to protect sensitive semiconductor modules, including IGBTs, MOSFETs, diodes, and power bridge circuits.
As global power electronics systems expand—especially in EVs, renewable energy, energy storage systems (ESS), and railway traction—the need for high-performance, robust semiconductor protection is greater than ever. The DNT000-M1M offers compact size, high rupture capacity, and international compliance, making it ideal for demanding environments.
Semiconductor Fuse Features
Semiconductor Fuse FAQs
1、What exactly qualifies as a semiconductor fuse?
A semiconductor fuse is a fast-acting protective device designed specifically for circuits that incorporate power electronics (IGBTs, MOSFETs, diodes). Unlike slow-blow fuses, semiconductor fuses interrupt overcurrent and short-circuit conditions much faster, limiting energy let-through (I²t) and protecting fragile components.
2、Why choose ceramic over glass for a semiconductor fuse?
Ceramic fuses have superior arc-quenching performance and higher breaking capacities. Glass fuses are useful for visual inspection but lack the thermal and mechanical robustness needed for high-power DC use. In high-current DC circuits, ceramic semiconductor fuses reduce the risk of explosion or arc-flare better than glass.
3、Can I replace a ceramic semiconductor fuse with a glass fuse in a DC system?
No. Glass fuses are generally not suitable for high-current DC protection. They lack the high breaking capacity and arc suppression performance required. Always use a properly rated ceramic semiconductor fuse such as DNT000-M1M for 800 V DC systems.
4、How do I select the proper current rating?
Choose a fuse rating slightly above the normal operating current (e.g., 125–150%), but ensure the fuse’s I²t and time-current characteristics match the system’s inrush and transient behavior. Consult GRL’s datasheets for appropriate selection curves.
