Why Choose the Mersen NH2UD69V350PV Protistor® High-Speed Fuse?
The Mersen NH2UD69V350PV is a high-performance NH Size 2 high-speed semiconductor protection fuse engineered for rapid short-circuit protection of sensitive power electronic components. Part of the established Mersen Protistor® NH aR range, it is designed to protect IGBTs, thyristors, GTOs, power diodes and rectifier assemblies used in demanding industrial electrical systems.
The NH2UD69V350PV combines an ultra-fast aR operating characteristic with low let-through energy, helping minimise thermal and electrical stress during fault conditions. Its robust ceramic body, precision fuse elements and silver-plated NH blade contacts support dependable performance in industrial drives, power converters and automation equipment.
With a rated current of 350 A and a rated voltage of 690 V AC IEC / 700 V AC UL, this fuse is suitable for high-power variable frequency drives, UPS systems, rectifiers, inverters and industrial power conversion equipment. Its double visual indicator allows maintenance personnel to identify fuse operation quickly.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 350 A rated current for demanding power electronic applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, GTOs, power diodes and rectifiers.
- Low let-through energy helps reduce semiconductor damage.
- Double visual indicator simplifies inspection and maintenance.
Key Features
- Mersen Protistor® NH aR series.
- NH Size 2 square-body fuse.
- 350 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- High AC breaking capacity for dependable fault interruption.
- Double visual fuse-operation indicator.
- Plain silver-plated NH blade terminals.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can be permanently damaged by excessive current within milliseconds. The Mersen NH2UD69V350PV is engineered to interrupt short-circuit currents rapidly, limiting the energy transferred to protected components and reducing the risk of extensive secondary damage.
The fuse’s aR characteristic is specifically intended for semiconductor short-circuit protection. Appropriate overload protection should also be incorporated into the electrical system, and replacement selection should always account for the voltage, current, breaking capacity, time-current performance and physical format required by the equipment manufacturer.
Typical Applications
- High-power variable frequency drives.
- Industrial motor control systems.
- Power converters and rectifier assemblies.
- Uninterruptible power supply systems.
- Industrial inverters and power supplies.
- Renewable energy power conversion equipment.
