Mersen K1039747 HP12NH2XLGPV250 250 A gPV photovoltaic fuse-link rated at 1250 V DC, with an NH Size 2XL body, plain blade terminals and a 50 kA interrupting capacity.
£205.31
The Mersen K1039747, manufacturer reference HP12NH2XLGPV250, is a high-performance 250 A photovoltaic fuse-link developed specifically to protect high-current cables and electrical equipment in commercial and utility-scale solar installations. Part of the specialist Mersen HelioProtection® HP12NHXL series, it is rated for photovoltaic circuits operating at up to 1250 V DC.
Photovoltaic arrays can produce sustained reverse currents and distinctive DC fault conditions that require dedicated overcurrent protection. The K1039747 features a full-range gPV operating characteristic, enabling it to interrupt both lower-level photovoltaic overcurrents and severe short-circuit currents before they damage cables, combiner equipment or inverter inputs.
With its NH Size 2XL construction, plain blade terminals and 50 kA DC interrupting capacity, the K1039747 provides dependable protection for demanding renewable energy systems. Its integrated fuse status indicator assists maintenance teams by providing a clear visual indication when the fuse-link has operated.
Large photovoltaic arrays require specialist DC protection because their fault-current behaviour differs from conventional AC distribution systems. A gPV fuse-link is designed to provide full-range protection, interrupting sustained reverse currents as well as high-energy short circuits within the photovoltaic array.
The Mersen K1039747 helps isolate faulty PV groups before excessive current damages cables, connectors, combiner equipment or inverter components. Its NH Size 2XL construction makes it particularly suitable for high-current main fuse applications within centralised solar power systems.
| Current | 250 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP12NHXL |
| Model | HP12NH2XLGPV250 |
| Item number | K1039747 |
| Product type | Photovoltaic NH fuse-link |
| Application class | gPV |
| Rated current | 250 A |
| Rated voltage | 1250 V DC |
| Breaking capacity | 50 kA DC |
| Fuse size | NH Size 2XL |
| Terminal type | Plain blade |
| Mounting type | Compatible clip-mounted fuse base |
| Indicator | Visual fuse operation indicator |
| Dimensions (L × W × H) | Approx. 123 × 51 × 60 mm |
| Standards | IEC 60269-6 and UL 2579 |
| Fuse operation | Single use |
The K1039747 protects high-current photovoltaic cables and connected DC equipment against overloads, reverse currents and short-circuit faults.
The Mersen K1039747 has a rated current of 250 A.
The HP12NH2XLGPV250 is rated for photovoltaic circuits operating at up to 1250 V DC.
This product is an NH Size 2XL fuse-link with plain blade terminals for installation in a compatible fuse base.
Yes. The fuse-link includes an integrated visual indicator that helps identify when the fuse has operated and requires replacement.
Mersen HelioProtection® fuse-links are widely used by solar engineers, switchgear manufacturers and renewable energy contractors to provide dependable protection for high-voltage photovoltaic cables and equipment.
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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...