Mersen A1033390 HP12NH3LGPV315 HelioProtection NH3L gPV photovoltaic fuse-link rated at 315 A and 1250 V DC for utility-scale solar power systems.
Replacement product
MERSEN FUSE 1500VDC NH3L gPV 315A HP15NH3LGPV315
SKU: L1037862
£285.02 ex VAT
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£207.20
The Mersen A1033390, catalogue reference HP12NH3LGPV315, is a high-capacity photovoltaic fuse-link designed to protect large-scale solar installations against overloads and short-circuit faults. As part of the Mersen HelioProtection® HP12NH series, it delivers dependable full-range protection for modern high-voltage DC photovoltaic systems operating up to 1250 V DC.
Featuring a specialised gPV operating characteristic, this fuse is engineered to safely interrupt the sustained fault currents generated by photovoltaic arrays. It helps protect solar strings, combiner boxes, inverter inputs and associated DC distribution equipment while maintaining high system reliability.
With a rated current of 315 A, an NH3L square-body format and plain blade terminals, the A1033390 is ideal for utility-scale solar farms and high-power commercial photovoltaic installations requiring robust overcurrent protection.
Large photovoltaic arrays require specialised protective devices capable of interrupting sustained DC fault currents safely. The Mersen A1033390 provides full-range gPV protection, helping to protect expensive solar equipment while maintaining system safety and operational continuity.
Its NH3L construction and 1250 V DC rating make it particularly suitable for utility-scale renewable energy projects, where dependable circuit protection and long service life are essential.
| Current | 315 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP12NH |
| Model | A1033390 |
| Catalogue reference | HP12NH3LGPV315 |
| Product type | Photovoltaic fuse-link |
| Rated current | 315 A |
| Rated voltage | 1250 V DC |
| Operating characteristic | gPV |
| Breaking capacity | 50 kA |
| Fuse size | NH3L |
| Body format | Square body |
| Terminal type | Plain blade |
| Power dissipation at rated current | 53 W |
| Power dissipation at 70% In | 22 W |
| Weight | Approx. 1.66 kg |
| Applicable standards | IEC 60269-6, UL 2579, RoHS compliant |
The Mersen A1033390 protects high-current photovoltaic circuits, grouped solar strings and inverter DC inputs against overloads and short-circuit faults.
The fuse has a rated current of 315 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 circuits, covering both overload and short-circuit conditions.
The A1033390 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...