Mersen A1003996 DC121GC12C100EF HelioProtection size 121 gPV photovoltaic fuse-link rated at 100 A and 1200 V DC for solar array cable, grouped-string and combiner panel protection.
£212.78
The Mersen A1003996, catalogue reference DC121GC12C100EF, is a high-performance photovoltaic fuse-link designed to protect DC cables and grouped solar strings against overloads and short-circuit faults. Part of the Mersen HelioProtection® DC120-123 series, it provides dependable full-range protection for demanding photovoltaic power generation systems.
This fuse uses a gPV operating characteristic specifically developed for photovoltaic applications. Its low fault-current interrupting capability enables effective protection under the challenging current conditions found within solar arrays, while its low power losses help support efficient system performance.
With a rated current of 100 A, a rated voltage of 1200 V DC and a high breaking capacity of 100 kA, the A1003996 is suitable for protecting PV array cables, combiner panels and DC distribution circuits. Its square-body size 121 construction provides secure installation in compatible photovoltaic fuse bases and electrical assemblies.
Photovoltaic installations can produce sustained DC fault currents that differ significantly from faults in conventional AC electrical systems. The Mersen A1003996 is specifically engineered to interrupt these currents and protect solar array cables, grouped strings and associated equipment from thermal damage.
Its gPV full-range characteristic provides protection against both lower-level overcurrents and severe short circuits. The fuse also offers strong temperature-cycle withstand performance, helping it remain reliable despite the changing temperatures commonly experienced by outdoor photovoltaic equipment.
| Current | 100 A |
|---|---|
| Voltage | 200 V |
| Manufacturer | Mersen |
| Series | HelioProtection® DC120-123 |
| Model | A1003996 |
| Catalogue reference | DC121GC12C100EF |
| Alternative reference | DC121GPV12C100E |
| Product type | Photovoltaic DC fuse-link |
| Rated current | 100 A |
| Rated voltage | 1200 V DC |
| Operating characteristic | gPV |
| Current type | DC |
| Breaking capacity | 100 kA |
| Minimum breaking current | 2 × rated current |
| Fuse size | Size 121 |
| Body format | Square body |
| Indicator | None |
| Power loss at rated current | Approx. 38 W |
| Applicable standards | IEC 60269-1 and IEC 60269-6 |
The Mersen A1003996 is used to protect photovoltaic cables, grouped solar strings and DC distribution circuits against overloads and short-circuit faults.
The A1003996 has a rated current of 100 A.
This photovoltaic fuse is rated for operation at up to 1200 V DC.
A gPV fuse provides full-range protection specifically for photovoltaic circuits, covering both overload currents and short-circuit faults.
The Mersen A1003996 is designed in accordance with IEC 60269-1 and IEC 60269-6 requirements for low-voltage and photovoltaic fuse-links.
Mersen HelioProtection® fuse-links are widely used by solar installers, panel manufacturers and renewable energy engineers to provide dependable protection for high-voltage photovoltaic DC 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...