Mersen HP12NH1LGPV125B 125 A NH1XL gPV photovoltaic fuse-link rated at 1250 V DC with direct-mount bolted blade terminals.
£153.60
The Mersen K1048671, catalogue reference HP12NH1LGPV125B, is a specialist 125 A photovoltaic fuse-link designed for protecting photovoltaic group cables and associated DC equipment in commercial and utility-scale solar installations. Part of the Mersen HelioProtection® HP12NH series, it is engineered specifically for photovoltaic systems operating at up to 1250 V DC.
Unlike conventional industrial fuses, the HP12NH series is designed specifically to interrupt the unique low-level reverse currents and high-energy short-circuit faults generated within solar arrays. Its full-range gPV operating characteristic provides dependable protection for photovoltaic cables, combiner boxes and inverter input circuits while helping maximise long-term system reliability.
With a 125 A current rating, 1250 V DC operating voltage, 50 kA interrupting capacity and direct-mount bolted blade terminals, the K1048671 is well suited for high-performance renewable energy installations requiring secure electrical connections and reliable overcurrent protection.
Modern photovoltaic arrays require dedicated DC protection because solar circuits generate fault conditions that differ significantly from conventional AC systems. The Mersen HP12NH range has been engineered specifically to provide full-range protection against overloads and short-circuit faults within photovoltaic installations.
The K1048671 helps protect grouped photovoltaic cables and connected equipment by safely interrupting fault currents before damage can occur. Its direct-mount construction makes it particularly suitable for combiner boxes, inverter inputs and high-current DC distribution assemblies.
| Current | 125 A |
|---|---|
| Voltage | 250 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP12NH |
| Model | HP12NH1LGPV125B |
| Item number | K1048671 |
| Product type | Photovoltaic NH fuse-link |
| Application class | gPV |
| Rated current | 125 A |
| Rated voltage | 1250 V DC |
| Breaking capacity | 50 kA DC |
| Fuse size | NH1XL |
| Terminal type | Direct-mount bolted blades |
| Mounting type | Direct mounting |
| Power dissipation | 12 W at 0.7 × rated current |
| Standards | IEC 60269-6 and UL 2579 |
The K1048671 protects photovoltaic cables and associated DC equipment against overloads and short-circuit faults in solar power systems.
The Mersen K1048671 has a rated current of 125 A.
This fuse-link is designed for photovoltaic systems operating at up to 1250 V DC.
The K1048671 is supplied as an NH1XL fuse-link with direct-mount bolted blade terminals.
The fuse complies with both 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 to provide dependable protection for high-voltage photovoltaic 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...
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...