Mersen Y1003994 DC120GC12C063EF HelioProtection photovoltaic fuse-link with a 63 A rating, 1200 V DC rating, 100 kA breaking capacity, gPV characteristic and Size 120 square-body construction.
£168.66
The Mersen Y1003994 is a high-performance square-body photovoltaic fuse-link designed to protect cables and electrical equipment in high-voltage solar power systems. Part of the specialist Mersen HelioProtection® DC120 range, it provides dependable full-range protection against overloads, reverse currents and short circuits within photovoltaic arrays.
This gPV fuse-link is engineered to interrupt both relatively low photovoltaic fault currents and high-level short-circuit currents. Its robust construction is designed to withstand repeated current and temperature cycling, helping maintain reliable protection throughout the operating life of commercial, industrial and utility-scale solar installations.
With a rated current of 63 A, a voltage rating of 1200 V DC and a breaking capacity of 100 kA DC, the Y1003994 is suitable for protecting photovoltaic string groups, combiner circuits and inverter inputs. Its Size 120 square-body construction and open slotted blade terminals support secure installation within compatible photovoltaic protection equipment.
Photovoltaic systems can produce sustained reverse currents and relatively low-level DC faults that conventional industrial fuse-links may not safely interrupt. A correctly selected gPV fuse isolates these abnormal currents before excessive heat or electrical energy damages photovoltaic modules, cables, combiner equipment or inverter inputs.
The Mersen DC120 HelioProtection® range combines low fault-current interruption, high breaking capacity and resistance to repeated temperature cycling. These characteristics make the Y1003994 suitable for renewable energy installations where dependable long-term circuit protection is essential.
| Current | 63 A |
|---|---|
| Voltage | 200 V |
| Manufacturer | Mersen |
| Series | HelioProtection® DC120 |
| Model | Y1003994 |
| Catalogue number | DC120GC12C063EF |
| Alternative designation | DC120GPV12C063E |
| Product type | Photovoltaic fuse-link |
| Operating characteristic | gPV |
| Rated current | 63 A |
| Rated voltage | 1200 V DC |
| Breaking capacity | 100 kA DC |
| Fuse size | Size 120 |
| Body format | Square body |
| Terminal type | Open slotted blades |
| Voltage type | DC |
| Power dissipation at rated current | 23 W |
| Indicator | Without visual indicator |
| Protection function | Full-range photovoltaic circuit protection |
| Application | Solar photovoltaic systems |
The Mersen Y1003994 protects photovoltaic cables, combiner circuits and inverter inputs against overloads, reverse currents and short-circuit faults.
The Y1003994 has a rated current of 63 A.
This photovoltaic fuse-link is rated for DC systems operating at up to 1200 V DC.
The Y1003994 has a rated breaking capacity of 100 kA DC.
The gPV classification identifies a full-range fuse-link specifically designed to protect photovoltaic circuits against overload and short-circuit currents.
Mersen HelioProtection® photovoltaic fuse-links are widely specified by solar engineers, panel builders and renewable energy contractors for dependable protection in demanding commercial and utility-scale DC installations.
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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...