Mersen G1039744 HP12NH1XLGPV125 NH1XL gPV photovoltaic fuse rated at 125 A and 1250 V DC with plain blade terminals for clip mounting.
Replacement product
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SKU: W1048681
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The Mersen G1039744 is a premium NH1XL gPV photovoltaic fuse-link developed specifically to provide reliable overcurrent protection for next-generation solar power systems operating at up to 1250 V DC. As part of the advanced Mersen HelioProtection® HP12NHXL range, it protects photovoltaic strings, combiner boxes, inverter inputs and associated DC cabling against overloads and short circuits.
Designed for modern high-voltage photovoltaic installations, the HP12NHXL series offers full-range gPV protection in accordance with international IEC and UL standards. Its robust NH1XL construction, plain blade terminals and high interrupting capability ensure dependable performance in demanding commercial and utility-scale renewable energy applications.
With a 125 A current rating, 1250 V DC voltage rating and 50 kA breaking capacity, the Mersen G1039744 delivers reliable protection whilst supporting the latest high-efficiency photovoltaic system architectures.
Purpose-designed photovoltaic fuse-links provide essential protection against overloads and short circuits within DC solar arrays. Correctly specified gPV fuses protect photovoltaic modules, combiner boxes, inverter equipment and associated cabling whilst improving the safety and reliability of renewable energy systems.
The Mersen HelioProtection® HP12NHXL series has been engineered for modern 1250 V DC photovoltaic installations, delivering low power losses, high interrupting capability and dependable long-term performance in demanding commercial and utility-scale solar projects.
| Current | 125 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP12NHXL |
| Manufacturer part number | G1039744 |
| Catalogue number | HP12NH1XLGPV125 |
| Product type | NH1XL gPV photovoltaic fuse-link |
| Rated current | 125 A |
| Rated voltage | 1250 V DC |
| Fuse characteristic | gPV |
| Fuse size | NH1XL |
| Terminal style | Plain blade |
| Mounting | Clip mounting |
| Breaking capacity | 50 kA DC |
| Power dissipation at rated current | 29 W |
| Power dissipation at 70% rated current | 11.5 W |
| Dimensions (L × W × H) | Approx. 125.5 × 39.5 × 52.5 mm |
| Weight | Approx. 0.44 kg |
| Standards | IEC 60269-6, UL 2579 |
| EAN | 3605340552218 |
The Mersen G1039744 protects photovoltaic DC circuits against overloads and short circuits in commercial and utility-scale solar installations.
This fuse has a 125 A rated current.
The HP12NH1XLGPV125 is designed for photovoltaic systems operating at up to 1250 V DC.
The fuse provides a maximum 50 kA DC breaking capacity for dependable interruption of high DC fault currents.
The fuse complies with IEC 60269-6 and UL 2579 photovoltaic fuse standards.
Mersen HelioProtection® photovoltaic fuse-links are trusted worldwide by solar installers, EPC contractors and renewable energy engineers for dependable protection of commercial and utility-scale photovoltaic systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...
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...