Mersen X1003993 DC120GC12C050EF HelioProtection photovoltaic fuse-link with a 50 A rating, 1200 V DC rating, 100 kA breaking capacity, gPV characteristic and Size 120 square-body construction.
£166.06
The Mersen X1003993 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 series, it provides reliable full-range protection against the overloads, reverse currents and short circuits that can occur within photovoltaic arrays.
This gPV fuse-link is engineered to interrupt the relatively low fault currents associated with photovoltaic installations while also providing a high maximum breaking capacity. Its robust construction withstands repeated current and temperature cycling, helping maintain dependable protection throughout the operating life of commercial and utility-scale solar systems.
With a rated current of 50 A, a voltage rating of 1200 V DC and a breaking capacity of 100 kA DC, the X1003993 is suitable for protecting photovoltaic string groups, combiner circuits and inverter inputs. Its Size 120 body and slotted blade terminals allow secure mounting within compatible high-voltage fuse equipment.
Photovoltaic systems can produce sustained reverse currents and low-level DC faults that standard industrial fuse-links may not safely interrupt. A correctly selected gPV fuse isolates these abnormal currents before they damage 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 X1003993 suitable for renewable energy installations where dependable long-term circuit protection is essential.
| Current | 50 A |
|---|---|
| Voltage | 200 V |
| Manufacturer | Mersen |
| Series | HelioProtection® DC120 |
| Model | X1003993 |
| Catalogue number | DC120GC12C050EF |
| Product type | Photovoltaic fuse-link |
| Operating characteristic | gPV |
| Rated current | 50 A |
| Rated voltage | 1200 V DC |
| Breaking capacity | 100 kA DC |
| Minimum breaking current | 2 × rated current |
| Fuse size | Size 120 |
| Body format | Square body |
| Terminal type | Open slotted blades |
| Indicator | Striker |
| Power dissipation at rated current | 20 W |
| Voltage type | DC |
| Standards | IEC 60269-1 and IEC 60269-6 |
| Application | Photovoltaic system protection |
The Mersen X1003993 protects cables, combiner circuits and inverter inputs in high-voltage photovoltaic installations against overloads, reverse currents and short circuits.
The X1003993 has a rated current of 50 A.
This photovoltaic fuse-link is rated for DC systems operating at up to 1200 V DC.
The X1003993 has a rated breaking capacity of 100 kA DC.
The gPV classification identifies a full-range fuse designed specifically to protect photovoltaic circuits against overload and short-circuit currents.
Mersen HelioProtection® photovoltaic fuses are widely specified by solar engineers, panel builders and renewable energy contractors for reliable 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...