Mersen B1033391 HP12NH3LGPV350 HelioProtection NH3L gPV photovoltaic fuse-link rated at 350 A and 1250 V DC for utility-scale solar power systems.
Replacement product
MERSEN FUSE 1500VDC NH3L gPV 350A HP15NH3LGPV350
SKU: M1037863
£292.31 ex VAT
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£213.40
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.
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.
| Current | 350 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP12NH |
| Model | B1033391 |
| Catalogue reference | HP12NH3LGPV350 |
| Product type | Photovoltaic fuse-link |
| Rated current | 350 A |
| Rated voltage | 1250 V DC |
| Operating characteristic | gPV |
| Current type | DC |
| Breaking capacity | 50 kA |
| Fuse size | NH3L |
| Terminal type | Plain blade |
| Power dissipation at rated current | 53 W |
| Power dissipation at 70% In | 23 W |
| Weight | Approx. 1.66 kg |
| Applicable standards | IEC 60269-6 and UL 2579 |
| EAN | 3605340538212 |
The Mersen B1033391 protects grouped photovoltaic strings, solar array cables and inverter DC circuits against overloads and short-circuit faults.
The fuse has a rated current of 350 A.
The fuse is designed for photovoltaic systems operating at up to 1250 V DC.
A gPV fuse provides full-range protection specifically for photovoltaic systems, covering both overload and short-circuit conditions.
The B1033391 uses the NH3L square-body format with plain blade terminals for installation in compatible photovoltaic fuse bases.
Mersen HelioProtection® photovoltaic fuse-links are trusted worldwide by solar developers, EPC contractors and renewable energy engineers to provide dependable protection for high-voltage photovoltaic power systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...