Why Choose the Mersen NH0UD69V125PV Protistor® Semiconductor Fuse?
The Mersen NH0UD69V125PV is a high-speed NH size 0 semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Part of the established Mersen Protistor® fuse range, it provides rapid fault interruption for equipment containing diodes, thyristors, IGBTs and other semiconductor devices.
This fuse features an aR operating characteristic, providing partial-range protection specifically suited to semiconductor circuits. Its current-limiting performance helps reduce the thermal and electromagnetic energy transmitted during a fault, protecting valuable equipment and helping minimise unplanned downtime.
With a rated current of 125 A, a rated voltage of 690 V AC and an industrial NH size 0 format, the NH0UD69V125PV is suitable for variable frequency drives, rectifiers, inverters, power converters and other demanding power-electronics applications. Its blade-contact construction enables installation in a compatible NH fuse base or fuse-switch disconnector.
Key Advantages
- High-speed fuse designed for semiconductor protection.
- 125 A rated current for industrial power-electronics equipment.
- 690 V AC voltage rating for demanding electrical systems.
- aR operating class provides rapid short-circuit protection.
- Strong current-limiting performance helps reduce damaging fault energy.
- Standard NH construction supports convenient installation and replacement.
Key Features
- Mersen Protistor® high-speed fuse range.
- 125 A rated current.
- 690 V AC rated voltage.
- aR semiconductor protection characteristic.
- NH size 0 square-body format.
- Industrial blade contacts for compatible NH fuse equipment.
- Low let-through energy during short-circuit conditions.
- Suitable for AC drives, converters and semiconductor assemblies.
Reliable Protection for Industrial Power Electronics
Semiconductor components can be damaged by fault energy before conventional industrial fuses have time to operate. The Mersen NH0UD69V125PV is engineered to interrupt short-circuit currents quickly, limiting the peak current and energy allowed to pass through the protected circuit.
Its high-speed performance makes it particularly suitable for coordinated protection within industrial drives and power converters. Because an aR fuse provides short-circuit rather than full-range overload protection, it should be used with correctly selected overload protection and installed according to the equipment manufacturer's requirements.
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.
- OEM machinery and industrial automation equipment.
