Why Choose the Mersen NH3UD69V350PV High-Speed Fuse?
The Mersen NH3UD69V350PV is a robust NH size 3 high-speed fuse link designed to protect sensitive power semiconductor devices and industrial electrical equipment against damaging short-circuit currents. Manufactured by Mersen, it provides rapid fault interruption for power conversion, motor-control and automation applications requiring dependable circuit protection.
Its high-speed operating characteristics help minimise peak fault current and let-through energy before a short circuit can damage downstream components. This makes the NH3UD69V350PV particularly suitable for electrical systems containing semiconductor devices such as diodes, thyristors, rectifiers and insulated-gate bipolar transistors.
With a rated current of 350 A and a rated voltage of up to 690 V AC, the NH3UD69V350PV is suitable for high-power industrial circuits, including variable frequency drives, inverters, power converters and uninterruptible power supplies. Its standard NH3 blade-contact format supports secure installation in compatible fuse bases and switch-disconnector assemblies.
Key Advantages
- High-speed fuse link designed for semiconductor protection.
- 350 A rated current for high-power industrial circuits.
- 690 V AC rated voltage suitable for industrial power systems.
- Rapid fault interruption helps protect sensitive electronic components.
- Current-limiting operation reduces thermal and mechanical fault stress.
- Standard NH size 3 blade-contact construction.
Key Features
- Mersen high-speed industrial fuse link.
- 350 A rated current.
- 690 V AC rated voltage.
- NH size 3 body format.
- Fast operating characteristics for power semiconductor circuits.
- High current-limiting performance during short-circuit conditions.
- Blade contacts for compatible NH fuse bases and disconnectors.
- Designed for power conversion, drive and automation equipment.
Reliable Protection for Power Semiconductor Equipment
High-speed fuse links such as the Mersen NH3UD69V350PV are designed to interrupt severe fault currents faster than conventional general-purpose industrial fuses. Their rapid response helps reduce the electrical energy that reaches sensitive downstream semiconductor components during a short circuit.
This current-limiting performance is important in variable speed drives, rectifiers, inverters and other power electronic systems where semiconductor devices can be damaged by even brief overcurrent events. Correct fuse selection helps improve equipment reliability, reduce unplanned downtime and limit costly component failures.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power inverters and converter systems.
- Industrial rectifiers and semiconductor assemblies.
- Uninterruptible power supplies.
- Battery energy and DC power systems.
- Automation panels and power distribution equipment.
