Why Choose the Mersen NH3UD69V450PV Protistor® High-Speed Fuse?
The Mersen NH3UD69V450PV is a premium NH Size 3 square body high-speed semiconductor protection fuse from the industry-leading Mersen Protistor® series. Specifically engineered to protect sensitive power electronic equipment, this ultra-fast aR fuse safeguards IGBTs, thyristors, GTOs, diodes and other semiconductor devices against damaging short-circuit currents while delivering exceptional current-limiting performance.
Manufactured with pure silver fuse elements embedded in solidified silica sand, the NH3UD69V450PV offers extremely low let-through energy (I²t), high interrupting capacity and silver-plated contact surfaces for dependable long-term operation. The double visual indicator simplifies maintenance and enables rapid identification of an operated fuse.
With a 450 A rated current and 690 V AC IEC / 700 V AC UL operating voltage, this NH Size 3 fuse is ideally suited for industrial drives, power converters, UPS systems, renewable energy installations and other demanding power conversion applications requiring rapid semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A rated current for high-power industrial equipment.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Designed to protect IGBTs, thyristors, GTOs and semiconductor devices.
- Low I²t characteristics minimise equipment damage during fault conditions.
- Double visual indicator for quick fuse status identification.
Key Features
- Mersen Protistor® high-speed fuse series.
- Model: NH3UD69V450PV.
- 450 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating class for semiconductor protection.
- NH Size 3 square body construction.
- Double visual indicator.
- Silver-plated plain blade contacts.
Reliable Protection for Industrial Power Electronics
The Mersen NH3UD69V450PV is engineered to interrupt fault currents rapidly before they can damage expensive semiconductor devices. Its low energy let-through characteristics help improve equipment reliability, reduce maintenance costs and minimise costly production downtime.
Designed for today's power conversion equipment, the Protistor® NH series provides dependable protection in industrial automation, renewable energy installations, motor drives and high-power electrical systems.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and semiconductor protection.
