Why Choose the Mersen NH2UD69V315PV Protistor® High Speed Fuse?
The Mersen NH2UD69V315PV is a Protistor® high speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Its rapid operating characteristics and low energy let-through help safeguard IGBTs, thyristors, diodes and rectifier assemblies used in demanding industrial power-conversion equipment.
Manufactured in the standard NH Size 2 format, this square-body fuse is suitable for compatible NH fuse bases, fuse holders and switch-disconnectors. Its robust ceramic construction, silver fuse elements and arc-quenching filler provide dependable current limitation and fault interruption in industrial environments.
With a rated current of 315 A, a rated voltage of 690 V AC under IEC specifications and an aR operating characteristic, the NH2UD69V315PV is well suited to variable-frequency drives, industrial inverters, rectifiers, UPS equipment and other semiconductor-based systems requiring high-speed short-circuit protection.
Key Advantages
- Ultra-fast protection for sensitive semiconductor devices.
- 315 A rated current for demanding industrial applications.
- 690 V AC IEC rating for low-voltage power-conversion systems.
- aR operating class optimised for semiconductor short-circuit protection.
- Low I²t performance helps reduce damaging thermal energy.
- Standard NH Size 2 construction for compatible mounting equipment.
Key Features
- Mersen Protistor® high speed fuse.
- Manufacturer reference: NH2UD69V315PV.
- 315 A rated current.
- 690 V AC IEC voltage rating.
- Up to 700 V AC under applicable UL product-family ratings.
- aR partial-range semiconductor protection.
- NH Size 2 square-body construction.
- Plain NH blade terminals.
- Visual fuse-operation indication.
- High current-limiting performance.
Designed for High-Speed Semiconductor Protection
Power semiconductors can be permanently damaged by high fault currents within a fraction of a second. The Mersen NH2UD69V315PV is engineered to interrupt short-circuit currents rapidly, limiting peak current and reducing the thermal and mechanical stress imposed on protected components.
Its aR classification means that it is a partial-range fuse intended primarily for semiconductor short-circuit protection. Appropriate overload protection should be provided separately where required by the equipment design and applicable electrical standards.
Typical Applications
- Variable-frequency drives and variable-speed drives.
- Industrial inverters and power converters.
- Rectifier assemblies.
- Uninterruptible power supply systems.
- Industrial motor-control equipment.
- Renewable-energy conversion systems.
- Battery energy-storage converters.
- IGBT, thyristor and diode protection circuits.
