MERSEN FUSE 1250VDC NH3L GPV 350A HP12NH3LGPV350

Why Choose the Mersen B1033391 HelioProtection Photovoltaic Fuse?

The Mersen B1033391, catalogue reference HP12NH3LGPV350, is a high-capacity photovoltaic fuse-link engineered to protect grouped solar strings, photovoltaic cables and DC distribution equipment against overloads and short-circuit faults. As part of the Mersen HelioProtection® HP12NH series, it delivers dependable full-range protection for high-voltage photovoltaic systems operating at up to 1250 V DC.

Designed with a specialised gPV operating characteristic, this fuse safely interrupts the sustained fault currents produced by photovoltaic arrays while protecting expensive solar equipment including combiner boxes, inverter inputs and DC distribution systems. It complies with internationally recognised photovoltaic protection standards, making it suitable for demanding renewable energy installations.

With a rated current of 350 A, an NH3L square-body format and plain blade terminals, the B1033391 is ideally suited to commercial rooftop installations, industrial solar plants and utility-scale photovoltaic projects requiring reliable overcurrent protection.

Key Advantages

• Purpose-designed gPV fuse protection for photovoltaic DC systems.
• 350 A rated current for high-capacity solar installations.
• 1250 V DC voltage rating for modern photovoltaic arrays.
• 50 kA breaking capacity provides dependable fault interruption.
• Low power losses help maximise photovoltaic system efficiency.
• Suitable for combiner boxes, inverter inputs and grouped string protection.

Key Features

• Mersen HelioProtection® HP12NH photovoltaic fuse-link.
• Manufacturer reference: B1033391.
• Catalogue reference: HP12NH3LGPV350.
• 350 A rated current.
• 1250 V DC rated voltage.
• gPV full-range photovoltaic fuse characteristic.
• NH3L square-body fuse size.
• Plain blade terminals.
• Low power dissipation for improved operating efficiency.
• IEC 60269-6 and UL 2579 compliant.

Reliable Protection for Utility-Scale Solar Installations

Modern photovoltaic installations require specialised protective devices capable of interrupting sustained DC fault currents safely. The Mersen B1033391 provides full-range gPV protection, helping to safeguard valuable photovoltaic equipment while maintaining system reliability and operational continuity.

Its NH3L construction, high breaking capacity and 1250 V DC rating make it particularly suitable for utility-scale renewable energy projects where dependable overcurrent protection is essential throughout the life of the installation.

Typical Applications

• Utility-scale photovoltaic power plants.
• Commercial solar farms.
• Photovoltaic combiner boxes.
• Solar inverter DC input protection.
• Grouped photovoltaic string circuits.
• Renewable energy DC distribution systems.
• Large-scale battery energy storage installations.