Why Choose the Mersen NH2UD69V400PV Protistor® High-Speed Fuse?
The Mersen NH2UD69V400PV is a Protistor® NH Size 2 high-speed semiconductor fuse designed to protect sensitive power electronic equipment against damaging short-circuit currents. Its rapid operating characteristics help safeguard IGBTs, thyristors, diodes, rectifiers and other semiconductor devices by limiting the peak current and fault energy passed through the circuit.
Rated at 400 A and 690 V AC, the NH2UD69V400PV is suited to demanding industrial installations that require dependable current limitation and a high level of semiconductor protection. Its robust NH square-body format is designed for use with compatible NH fuse bases and switch-disconnectors.
The fuse is particularly suitable for industrial drives, converters, inverters and power-control systems where conventional general-purpose fuses may not operate quickly enough to protect sensitive electronic components. The complete Mersen reference should always be checked against the original fuse and equipment documentation before replacement.
Key Advantages
- High-speed protection for sensitive semiconductor devices.
- 400 A current rating for high-power industrial equipment.
- 690 V AC voltage rating.
- Low let-through energy helps minimise semiconductor damage.
- Current-limiting operation reduces thermal and mechanical stress.
- Standard NH Size 2 square-body format.
Key Features
- Mersen Protistor® semiconductor fuse technology.
- NH Size 2 fuse-link construction.
- 400 A rated current.
- 690 V AC rated voltage.
- High-speed semiconductor protection characteristics.
- Industrial ceramic square-body construction.
- Blade contacts for compatible NH fuse equipment.
- Designed for professional industrial installations.
Engineered for High-Power Semiconductor Protection
Semiconductor devices can be damaged within milliseconds when subjected to excessive current. The Mersen NH2UD69V400PV is designed to interrupt serious electrical faults rapidly, helping reduce the amount of thermal energy transferred to connected electronic components.
Correct fuse selection should take account of the circuit voltage, continuous operating current, prospective fault current and energy-withstand characteristics of the protected semiconductor. The replacement fuse should match the complete manufacturer reference rather than being selected solely by its physical size or current rating.
Typical Applications
- Variable frequency drives and motor-control systems.
- Industrial inverters and power converters.
- Rectifier and thyristor assemblies.
- Uninterruptible power supply systems.
- High-power semiconductor protection circuits.
- Industrial automation and electrical control panels.
