Mersen K1037861 HP15NH3LGPV250 250 A gPV photovoltaic fuse-link rated at 1500 V DC, with an NH Size 3L body, plain blade terminals and a 150 kA breaking capacity.
£277.71
The Mersen K1037861, catalogue reference HP15NH3LGPV250, is a high-performance 250 A photovoltaic fuse-link designed specifically to protect cables and electrical equipment in commercial and utility-scale solar power installations. Part of the established Mersen HelioProtection® HP15NH series, it is rated for photovoltaic circuits operating at up to 1500 V DC.
Photovoltaic systems can generate sustained reverse currents and unusual DC fault conditions that require specialist overcurrent protection. The K1037861 features a full-range gPV operating characteristic, enabling it to protect PV group cables against lower-level overcurrents and severe short-circuit faults.
With an NH Size 3L body, silver-plated copper plain blade terminals and a maximum breaking capacity of 150 kA at 1500 V DC, this fuse-link provides dependable protection for high-power solar installations. Its clip-mounted format supports secure installation in compatible photovoltaic fuse bases and DC distribution assemblies.
Large photovoltaic arrays require dedicated DC protection because their electrical fault behaviour differs from conventional AC distribution systems. A gPV fuse-link is designed to interrupt the complete range of photovoltaic fault currents, including sustained reverse currents that may damage cables and connected equipment.
The Mersen K1037861 helps isolate a faulty photovoltaic group when a short circuit occurs within a panel or string circuit. Its high breaking capacity and robust NH construction make it suitable for combiner boxes, central inverter inputs and high-current DC distribution systems.
| Current | 250 A |
|---|---|
| Voltage | 500 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP15NH |
| Model | HP15NH3LGPV250 |
| Item number | K1037861 |
| EAN | 3605340547382 |
| Product type | Photovoltaic NH fuse-link |
| Application class | gPV |
| Rated current | 250 A |
| Rated voltage | 1500 V DC IEC / UL |
| Maximum breaking capacity | 150 kA DC at 1500 V |
| Time constant | L/R 3 ms |
| Fuse size | NH Size 3L |
| Mounting type | Clip mounting |
| Terminal type | Plain blades |
| Terminal material | Silver-plated copper |
| Frequency | 50 / 60 Hz |
| Dimensions (L × W × H) | 205 × 70 × 84.5 mm |
| Weight | Approx. 1.69 kg |
| Power dissipation at rated current | 50 W |
| Power dissipation at 0.7 × rated current | 20 W |
| Standards | IEC 60269-6 and UL 2579 |
| RoHS compliant | Yes |
| HS Code | 85351000 |
The K1037861 protects photovoltaic group cables and associated DC equipment against overloads, reverse currents and short-circuit faults.
The Mersen K1037861 has a rated current of 250 A.
The HP15NH3LGPV250 is rated for photovoltaic circuits operating at up to 1500 V DC under both IEC and UL specifications.
This model is an NH Size 3L fuse-link with plain blade terminals for installation in a compatible clip-mounted fuse base.
The fuse has a maximum breaking capacity of 150 kA DC at 1500 V, enabling dependable interruption of severe photovoltaic fault currents.
Mersen HelioProtection® photovoltaic fuse-links are widely used by solar engineers, panel builders and renewable energy contractors to provide dependable protection for high-voltage PV cables, combiner equipment and inverter circuits.
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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...