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MERSEN FUSE 1250VDC NH3L gPV 350A K bolted HP12NH3LGPV350B
Mersen R1048677 HelioProtection photovoltaic fuse-link with a 350 A rating, 1250 V DC rating, gPV operating class, NH3L format and DIN-type bolted blades for direct mounting.
This product has been discontinued
A direct replacement is available below.
Replacement product
MERSEN FUSE 1500VDC NH3L gPV 350A K bolted HP15NH3LGPV350B
SKU: Y1048683
£199.52 ex VAT
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Why Choose the Mersen R1048677 HelioProtection® Photovoltaic Fuse?
The Mersen R1048677 is a high-performance NH3L photovoltaic fuse-link designed to protect high-voltage DC circuits in commercial and utility-scale solar installations. Part of the established Mersen HelioProtection® HP12NHXL range, it provides dependable full-range protection against overloads and short circuits within demanding photovoltaic systems.
This gPV fuse-link features DIN-type bolted blades for direct mounting, enabling secure integration into photovoltaic combiner boxes, inverter input assemblies and DC distribution equipment. Its robust construction and ability to interrupt low-level fault currents help protect valuable solar equipment while supporting reliable long-term system operation.
With a rated current of 350 A and a voltage rating of 1250 V DC, the R1048677 is suitable for protecting high-capacity photovoltaic arrays and associated DC cabling. Its NH3L format makes it particularly suitable for panel builders, solar contractors and equipment manufacturers requiring dependable high-voltage fuse protection.
Key Advantages
- Designed specifically for photovoltaic DC circuit protection.
- 350 A rated current for high-capacity solar installations.
- 1250 V DC voltage rating for modern photovoltaic systems.
- gPV full-range protection against overloads and short circuits.
- DIN-type bolted blades provide secure direct mounting.
- Suitable for commercial and utility-scale solar power systems.
Key Features
- Mersen HelioProtection® HP12NHXL series.
- Catalogue number: HP12NH3LGPV350B.
- Item number: R1048677.
- 350 A rated current.
- 1250 V DC rated voltage.
- gPV operating class.
- NH3L fuse-link format.
- DIN-type bolted blades for direct mounting.
Reliable Protection for High-Voltage Photovoltaic Systems
Photovoltaic fuse-links are designed to interrupt reverse currents, overloads and short-circuit faults within solar DC networks. Correctly selected gPV fuses help protect cables, combiner equipment, inverters and other valuable components from damage caused by abnormal electrical conditions.
The Mersen HP12NHXL range combines dependable low fault-current interruption with resistance to repeated temperature and current cycling. These characteristics make the R1048677 suitable for solar installations where reliable long-term performance and efficient high-voltage protection are essential.
Typical Applications
- Photovoltaic array combiner boxes.
- Solar inverter DC input protection.
- Sub-combiner and master-combiner panels.
- Utility-scale solar farms.
- Commercial photovoltaic installations.
- High-voltage DC distribution equipment.
Technical Specifications
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| Voltage | 1250 V | |
|---|---|---|
| Current | 350 A | |
| Device Type | Fuse link | |
| Fuse Type | PV (gPV) | |
| Fuse Class | gPV | |
| Manufacturer | Mersen | |
| Series | HelioProtection® HP12NHXL | |
| Model | R1048677 | |
| Catalogue number | HP12NH3LGPV350B | |
| Product type | Photovoltaic fuse-link | |
| Operating class | gPV | |
| Rated current | 350 A | |
| Rated voltage | 1250 V DC | |
| Voltage type | DC | |
| Fuse size | NH3L | |
| Blade type | DIN-type bolted blades | |
| Mounting type | Direct mounting | |
| Protection function | Overload and short-circuit protection | |
| Standards | IEC 60269-6 and UL 2579 | |
| Application | Photovoltaic system protection |
Frequently Asked Questions
What is the Mersen R1048677 used for?
The Mersen R1048677 is used to protect high-voltage photovoltaic circuits, DC cabling, combiner boxes and inverter inputs against overloads and short circuits.
What is the current rating of this fuse?
The R1048677 has a rated current of 350 A.
What voltage is the R1048677 rated for?
This photovoltaic fuse-link is rated for systems operating at up to 1250 V DC.
How is the fuse installed?
The fuse features DIN-type bolted blades and is designed for secure direct mounting within suitable photovoltaic protection equipment.
What does the gPV classification mean?
The gPV classification identifies a full-range fuse specifically designed to protect photovoltaic circuits against both overload and short-circuit currents.
Trusted by Solar and Electrical Professionals Worldwide
Mersen HelioProtection® photovoltaic fuses are widely specified by solar engineers, panel builders and renewable energy contractors for reliable DC protection in demanding commercial and utility-scale installations.
