Why Choose the Mersen NH3GS69V400PV Protistor® High-Speed Fuse?
The Mersen NH3GS69V400PV, item number J322583, is a Protistor® NH size 3 high-speed semiconductor fuse designed to provide full-range protection for power semiconductor equipment. Featuring a gS operating characteristic, this fuse offers both overload and short-circuit protection for sensitive devices including IGBTs, thyristors, diodes and GTOs used in modern power conversion systems.
Rated at 400 A with a voltage rating of 690 V AC (IEC) and 700 V AC (UL), the NH3GS69V400PV provides exceptional current-limiting performance, helping minimise thermal stress and damage during fault conditions. Pure silver fuse elements embedded in solidified silica sand, combined with silver-plated contacts, ensure high interrupting capacity and reliable long-term operation.
Designed for installation in standard NH fuse systems conforming to DIN 43620, the fuse includes a double visual indicator and supports optional microswitch accessories for remote indication. It is ideally suited to industrial drives, UPS systems, renewable energy installations, rectifiers, inverters and heavy-duty power converters.
Key Advantages
- Genuine Mersen Protistor® semiconductor protection fuse.
- 400 A current rating.
- 690 V AC IEC / 700 V AC UL rated voltage.
- gS full-range protection against overloads and short circuits.
- Double visual indicator with optional remote signalling.
- Low I²t characteristics help maximise semiconductor protection.
Key Features
- Manufacturer: Mersen
- Item number: J322583
- Catalogue reference: NH3GS69V400PV
- Series: Protistor®
- NH size 3 square body fuse.
- gS operating class.
- Double visual indicator.
- Silver-plated blade contacts.
Engineered for Full-Range Semiconductor Protection
The Protistor® gS range has been developed to provide complete protection of semiconductor equipment by interrupting both overload and short-circuit faults before damaging thermal energy reaches sensitive components. This helps maximise equipment uptime while extending the service life of valuable power electronic assemblies.
The NH3GS69V400PV is suitable for high-power converters, motor drives, UPS systems, renewable energy installations and industrial automation equipment requiring dependable semiconductor protection.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- Rectifiers and inverters.
- UPS systems.
- Renewable energy and photovoltaic installations.
- Motor control centres.
- Industrial automation equipment.
