Why Choose the Mersen NH00UD69V50PV Protistor® Semiconductor Fuse?
The Mersen NH00UD69V50PV is a high-speed NH size 00 semiconductor fuse designed to protect sensitive power-electronic components against damaging short-circuit currents. Part of the established Mersen Protistor® fuse range, it is suitable for industrial equipment incorporating IGBTs, thyristors, power diodes, rectifiers and other semiconductor devices.
Featuring an aR operating characteristic, the NH00UD69V50PV provides partial-range semiconductor protection with rapid fault interruption and effective current limitation. Its high-speed performance helps reduce peak fault current and let-through energy, limiting the thermal and electrical stress imposed on valuable semiconductor components.
With a rated current of 50 A, a rated voltage of 690 V AC under IEC requirements and 700 V AC under UL requirements, and an industrial NH size 00 format, this fuse is suitable for variable frequency drives, converters, rectifiers, inverters and other power-control systems. Its blade-contact construction enables installation in a correctly rated, compatible NH fuse base or fuse-switch disconnector.
Key Advantages
- High-speed Protistor® fuse for semiconductor protection.
- 50 A rated current for industrial power-electronic circuits.
- 690 V AC IEC and 700 V AC UL ratings.
- aR operating class for rapid semiconductor short-circuit protection.
- Current-limiting performance helps reduce damaging fault energy.
- Standard NH construction supports convenient maintenance and replacement.
Key Features
- Mersen Protistor® high-speed fuse range.
- 50 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR partial-range semiconductor protection characteristic.
- NH size 00 industrial fuse format.
- Square ceramic body with blade contacts.
- Low let-through energy during short-circuit conditions.
- Suitable for drives, converters and semiconductor assemblies.
Reliable Protection for Industrial Power Electronics
Power-semiconductor devices can be permanently damaged by fault energy before a conventional general-purpose fuse has time to operate. The Mersen NH00UD69V50PV is engineered to clear high fault currents rapidly while limiting the peak current and total energy transmitted to the protected circuit.
Its aR characteristic is intended specifically for short-circuit protection rather than full-range overload protection. The fuse should therefore be coordinated with suitable overload protection and selected according to the equipment manufacturer's requirements, circuit voltage, operating current and prospective short-circuit current.
Typical Applications
- Variable frequency drives and motor controllers.
- Industrial inverters and rectifiers.
- AC and DC power converters.
- Uninterruptible power supply systems.
- Soft starters and power-control assemblies.
- Industrial automation and OEM machinery.
