Why Choose the Mersen NH1UD69V250PV Protistor® High-Speed Fuse?
The Mersen NH1UD69V250PV is a Protistor® NH size 1 high-speed semiconductor fuse engineered to provide advanced protection for modern power electronic equipment. Designed with an aR operating characteristic, this fuse delivers rapid short-circuit protection for sensitive semiconductor devices including diodes, thyristors, GTOs and IGBTs. It is manufactured in accordance with the NH modular system defined by DIN 43620, allowing worldwide compatibility with NH fuse bases and switch disconnectors.
Rated at 250 A and 690 V AC (IEC) / 700 V AC (UL), the NH1UD69V250PV provides excellent current-limiting performance with low let-through energy (I²t). Its pure silver fuse elements, solidified silica filling and silver-plated blade contacts help achieve high interrupting capacity while protecting valuable semiconductor equipment from damaging fault currents.
The fuse features a double visual indicator for quick status identification and can operate compatible microswitch accessories for remote indication. It is ideal for industrial drives, power converters, UPS systems, rectifiers, renewable energy installations and other demanding power conversion applications.
Key Advantages
- Genuine Mersen Protistor® semiconductor protection fuse.
- 250 A current rating.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic for semiconductor protection.
- Double visual indicator with optional remote signalling capability.
- Low I²t performance helps protect expensive semiconductor devices.
Key Features
- Manufacturer: Mersen
- Manufacturer item number: J320375
- Catalogue reference: NH1UD69V250PV
- Protistor® square body semiconductor fuse.
- NH size 1 construction.
- Plain silver-plated blade contacts.
- aR operating class.
- Double visual fuse indicator.
Engineered for Semiconductor Protection
Protistor® semiconductor fuses are specifically engineered to interrupt fault currents before excessive thermal energy reaches sensitive semiconductor devices. Their advanced current-limiting characteristics reduce equipment damage, minimise downtime and improve overall system reliability in demanding industrial environments.
The NH1UD69V250PV is suitable for industrial applications requiring dependable protection of converters, inverters, motor drives, UPS systems and renewable energy equipment operating on high-power AC circuits.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- Rectifiers and inverters.
- UPS systems.
- Photovoltaic and renewable energy equipment.
- Industrial automation and motor control.
- Semiconductor protection in power conversion systems.
