Why Choose the Mersen NH2UD69V550PV High-Speed Fuse?
The Mersen NH2UD69V550PV is a high-performance NH size 2 high-speed fuse link designed to protect power semiconductor devices and industrial electrical equipment against damaging short-circuit currents. Manufactured by Mersen, a specialist in electrical protection products, this fuse provides rapid fault interruption for demanding power conversion, automation and drive applications.
Its ultra-fast operating characteristics help limit peak current and let-through energy during a fault, reducing the risk of damage to sensitive semiconductor components. The NH blade-contact format enables secure installation in compatible fuse bases, switch disconnectors and industrial distribution assemblies.
With a rated current of 550 A and a rated voltage of up to 690 V AC, the NH2UD69V550PV is suitable for high-current circuits used in variable speed drives, rectifiers, inverters, uninterruptible power supplies and other power electronic systems. Its NH2 body size provides a robust and standardised solution for industrial control panels and electrical cabinets.
Key Advantages
- High-speed semiconductor protection fuse for demanding industrial circuits.
- 550 A rated current for high-power electrical equipment.
- 690 V AC voltage rating suitable for industrial power systems.
- Fast fault interruption helps protect sensitive semiconductor components.
- Low let-through energy reduces thermal and mechanical stress during faults.
- Standard NH size 2 blade-contact design for secure installation.
Key Features
- Mersen high-speed fuse link.
- 550 A rated current.
- 690 V AC rated voltage.
- NH size 2 body format.
- Ultra-fast operating characteristics for semiconductor protection.
- High current-limiting performance during short-circuit faults.
- NH blade contacts for compatible fuse bases and switchgear.
- Designed for industrial power conversion and motor-control equipment.
Reliable Protection for Power Semiconductor Circuits
High-speed fuses such as the Mersen NH2UD69V550PV are engineered to respond significantly faster than conventional industrial fuse links. During a short-circuit event, the fuse rapidly interrupts the current and limits the amount of electrical energy passed to downstream components.
This operating behaviour is particularly important in circuits containing diodes, thyristors, insulated-gate bipolar transistors and other sensitive power semiconductor devices. By limiting fault energy, the fuse helps reduce equipment damage, production downtime and the cost of replacing critical electronic components.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power inverters and rectifier systems.
- Uninterruptible power supplies and battery systems.
- Industrial power converters.
- Semiconductor-controlled heating equipment.
- Automation panels and electrical distribution assemblies.
