Mersen HP10M7 HelioProtection gPV photovoltaic fuse rated at 7 A and 1000 V DC, with a compact 10 x 38 mm body and ferrule terminals for PV string protection.
The Mersen HP10M7 is a compact, high-performance gPV photovoltaic fuse link specifically developed to protect solar photovoltaic circuits against line faults, ground faults and damaging overcurrents. As part of the proven Mersen HelioProtection® HP10M series, it provides dependable protection for PV string wiring, combiner boxes, inverter inputs and associated DC equipment.
Rated at 7 A and 1000 V DC, the HP10M7 is engineered for the relatively low fault-current conditions produced by photovoltaic arrays. Its full-range gPV operating characteristic and low minimum breaking-current capability allow safe circuit interruption while helping protect solar modules, cables, connectors and connected equipment.
The HP10M7 features a compact 10 × 38 mm cylindrical body with ferrule terminals for installation in compatible clip-mounted fuse holders. Its robust construction withstands continuous temperature and current cycling, supporting reliable long-term operation in grid-connected and off-grid photovoltaic installations.
Photovoltaic arrays continue producing DC current whenever sufficient light is available, including during certain fault conditions. Specialist gPV fuses are therefore required to disconnect faulty strings before excessive reverse current or short-circuit current damages modules, cables, connectors or inverter equipment.
The Mersen HP10M7 combines low fault-current interruption capability with a high DC breaking capacity. Its compact format and durable construction make it well suited to continuous operation in residential, commercial, industrial and utility-scale photovoltaic systems.
| Current | 7 A |
|---|---|
| Voltage | 000 V |
| Manufacturer | Mersen |
| Series | HelioProtection® HP10M |
| Model | HP10M7 |
| Product type | Photovoltaic fuse link |
| Fuse utilisation category | gPV |
| Rated current | 7 A |
| Rated voltage | 1000 V DC |
| Current type | DC |
| Breaking capacity | 50 kA DC |
| Minimum breaking-current capability | Approx. 1.35 × rated current |
| Fuse format | Cylindrical midget fuse |
| Fuse dimensions | Approx. 10 × 38 mm |
| Terminal type | Ferrule |
| Mounting method | Clip mounting in a compatible fuse holder |
| Protection application | Photovoltaic string wiring |
| Standards | IEC 60269-6 and UL 2579 |
| Compliance | RoHS compliant |
The Mersen HP10M7 protects photovoltaic string wiring, combiner boxes, inverter inputs and other solar DC circuits against line faults, ground faults and damaging overcurrents.
The fuse has a rated current of 7 A and a rated operating voltage of 1000 V DC.
The HP10M7 has a compact cylindrical body measuring approximately 10 × 38 mm.
The gPV characteristic identifies a full-range fuse specifically designed to protect photovoltaic circuits against low-level overcurrents and high short-circuit currents.
The fuse has ferrule terminals and is installed in a compatible clip-mounted photovoltaic fuse holder rated for 1000 V DC operation.
Mersen HelioProtection® photovoltaic fuses are widely used by solar installers, renewable energy engineers and panel builders to provide dependable DC circuit protection in modern photovoltaic systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...