Why Choose the Mersen NH3UD69V1000PV Protistor® High Speed Fuse?
The Mersen NH3UD69V1000PV is a high-capacity Protistor® high speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Its rapid operating characteristics help safeguard IGBTs, thyristors, diodes and rectifier assemblies used in demanding industrial power conversion systems.
Manufactured in the standard NH Size 3 format, this square-body fuse combines high current capacity with low energy let-through performance. Its robust construction and NH blade terminals make it suitable for compatible fuse bases, switch disconnectors and industrial electrical protection assemblies.
With a rated current of 1000 A, a 690 V AC IEC voltage rating and an aR utilisation category, the NH3UD69V1000PV is well suited to high-power variable frequency drives, industrial inverters, rectifiers, converters and other semiconductor-based equipment requiring rapid fault interruption.
Key Advantages
- Ultra-fast semiconductor short-circuit protection.
- 1000 A rated current for high-power industrial applications.
- 690 V AC IEC voltage rating for industrial electrical systems.
- Low I²t performance helps minimise damaging energy let-through.
- Standard NH Size 3 format for compatible fuse mounting equipment.
- Visual operation indication supports efficient inspection and maintenance.
Key Features
- Mersen Protistor® high speed fuse series.
- 1000 A rated current.
- 690 V AC IEC rated voltage.
- aR semiconductor protection class.
- NH Size 3 square-body construction.
- NH blade terminal configuration.
- Visual fuse operation indicator.
- Low energy let-through characteristics.
- Designed for rapid short-circuit interruption.
- Suitable for high-power industrial conversion equipment.
Reliable Protection for High-Power Electronic Equipment
Semiconductor devices can sustain permanent damage when exposed to high short-circuit currents, even for extremely brief periods. The Mersen NH3UD69V1000PV is engineered to interrupt these faults rapidly, limiting peak current and reducing the thermal energy transferred to protected components.
The fuse’s aR operating characteristic is specifically intended for short-circuit protection of semiconductor devices. It should be used as part of a correctly coordinated protection system, with separate overload protection provided where required by the equipment design.
Typical Applications
- High-power variable frequency drives.
- Industrial power converters and rectifiers.
- Renewable energy inverters.
- Uninterruptible power supply systems.
- High-current motor control equipment.
- Battery energy storage power converters.
- Industrial traction and power systems.
- Semiconductor protection circuits.
