Best Photovoltaic (gPV) Fuse Suppliers (2026)

How this list was put together

We looked for manufacturers whose own websites publish a photovoltaic fuse range in the gPV category, the full-range utilization category for PV defined in the IEC 60269 series. Each site was loaded in September 2026. Where a site blocked automated access, we recorded that and used only text indexed from that manufacturer's own domain.

Each entry summarizes what the manufacturer publishes: formats, DC voltage class and the listings it names. We did not test any product and make no performance comparison between suppliers. DENCO is first because this is DENCO's site; its entry gives buyer-fit reasons, not a technical claim that it beats anyone else.

1. DENCO Fuses, Miami, Florida

Best for: Combiner box builders and EPC buyers who want gPV fuses and matching bases, 600 to 1500 VDC, on a 30-day lead time

DENCO's photovoltaic family is gPV fuses and bases for 600 to 1500 VDC, for solar DC strings and combiner boxes. Buying the fuse and its base together means one supplier confirms that the two match, which is one less check for a combiner builder.

DENCO Fuses, Inc. was incorporated in Florida in 1988 as DenMar Transit Engineering (later DenMar Fuses). Its team has over 100 years of combined experience, solely in manufacturing electrical fuses. DENCO quotes a 30-day lead time on all products (lead times in the industry are commonly longer). Fuses are manufactured in an ISO 9001:2015 certified facility and tested in-house at DENCO's factory lab, with third-party testing at IPH Berlin (Germany) available on client request.

If your project specification calls for a particular listing, such as UL 248-19 for a US installation, state it in the request for quote and DENCO engineering will tell you what evidence is available for the part. The solar RFQ guide lists everything DENCO needs to quote.

• gPV fuses and bases, 600 to 1500 VDC
• For PV string and combiner box protection
• 30-day lead time on all products
• Solar RFQ guide lists what to send for a quote

See the DENCO range

2. Eaton, Bussmann series photovoltaic fuses

Best for: Large US and international projects that want one PV fuse catalog from string level to recombiner

Eaton's Bussmann series photovoltaic fuses are described as gPV fuses for DC systems up to 1500 VDC, for solar panels, combiner boxes, recombiner units and battery storage, and designed for the low fault currents typical of PV arrays. Eaton's 14 x 65 mm PV fuse data states both UL 2579 listing and IEC 60269-6 gPV compliance.

Eaton also publishes a solar circuit protection application guide and matching PV fuse holders and blocks, which helps when one team specifies the whole DC side.

• gPV range up to 1500 VDC
• Panel, combiner, recombiner and battery storage applications
• PV holders, blocks and an application guide published

Eaton (Bussmann series) website

3. Mersen, HelioProtection PV fuses

Best for: Array and main-fuse positions that need NH-style gPV fuse-links at 1500 VDC with both IEC and UL paperwork

Mersen sells photovoltaic fuses under the HelioProtection name. The HP15NH range is a gPV fuse-link for 1500 VDC in 1XL, 2XL and 3L sizes, intended to protect cables in a group of PV strings when a short circuit occurs in a panel (Mersen calls this the main fuse category). Mersen states the range complies with IEC 60269-6 and UL 2579 and lists UL 248-19 recognition for the fuses, with 1XL and 2XL marked as pending.

The HP15NH is offered with plain blades or bolted blades for direct mounting, with or without a striker, and Mersen publishes matching NH fuse handles.

• HP15NH gPV fuse-links, 1500 VDC, sizes 1XL/2XL/3L
• IEC 60269-6 and UL 2579; UL 248-19 file E358319 (1XL, 2XL pending)
• Plain or bolted blades, optional striker

Mersen website

4. Littelfuse, SPXV solar fuses

Best for: String-level protection in 1500 VDC inverters and combiner boxes using the 10 x 85 mm format

Littelfuse lists the SPXV series as a solar string fuse for 1500 VDC applications, in a 10 x 85 mm body, used in inverter and combiner box applications. Littelfuse states the SPXV is UL 2579 listed and meets IEC 60269-6 electrical performance requirements.

• SPXV: 1500 VDC string fuse, 10 x 85 mm
• UL 2579 listed; IEC 60269-6 performance
• Inverter and combiner box applications

Littelfuse website

5. SIBA, gPV fuse-links

Best for: NH-format gPV fuse-links with indicators for European-style and North American equipment

SIBA, a fuse-link specialist since 1946, includes gPV parts in its catalog. One example is the URM NH1 gPV fuse-link rated 1000 VDC with knife contacts and a combination indicator, which SIBA lists against both IEC 60269-6 and UL 248-19. SIBA's catalog also covers the fuse bases, indicator systems and battery-storage fuses that often sit in the same plant.

• Example: URM NH1 gPV, 1000 VDC, IEC 60269-6 and UL 248-19
• Indicator options for monitoring
• Fuse-link specialist since 1946

SIBA website

6. DF Electric, Barcelona, Spain

Best for: Buyers who want cylindrical and NH gPV fuses plus modular PV fuse holders from one catalog

DF Electric was founded in Barcelona in 1987. Its photovoltaic range covers gPV cylindrical fuse-links (10 x 38, 14 x 51, 10 x 85, 10/14 x 85 and 22 x 65), gPV NH fuse-links at 1000 VDC, and gPV NH XL fuse-links at 1500 VDC.

DF Electric describes the NH XL 1500 VDC range (NH1XL, NH2XL and NH3L) as protection in sub-arrays, arrays or at the DC input of inverters, and lists IEC 60269-6 along with UL 248-19 for that range. It also makes PMX and PML-e PV fuse holders for string installations.

• Cylindrical gPV sizes from 10 x 38 to 22 x 65
• NH XL gPV 1500 VDC: NH1XL, NH2XL, NH3L
• PMX and PML-e PV fuse holders

DF Electric website

7. Siemens, SENTRON photovoltaic fuses

Best for: Projects standardizing on Siemens distribution equipment that want PV fuses from the same supplier

Siemens includes photovoltaic fuses in its SENTRON fuse systems range, described as designed for the requirements of solar power systems and providing DC protection for PV modules, cables and inverters.

• SENTRON photovoltaic fuses within the wider SENTRON fuse range
• Named uses: PV modules, cables and inverters

Siemens website

What gPV means and why it matters

In the IEC 60269 system, the first letter "g" means full-range breaking capacity: the fuse can interrupt every overcurrent from its minimum melting current up to its breaking capacity. "PV" marks it for photovoltaic duty. A PV array is a current-limited DC source, so faults can be small overcurrents that a general-purpose fuse would not clear cleanly, and DC has no natural current zero to help the arc go out.

IEC 60269-6 gives the supplementary requirements for fuse-links protecting PV strings and PV arrays in circuits up to 1500 V DC. In North America, UL 248-19 covers fuses for PV systems used to protect strings or arrays and their wiring. UL 248-19 says these fuses are not intended to protect downstream inverter components such as capacitors, and its November 2024 revision raised the maximum voltage in its scope. Several manufacturers also cite UL 2579, a UL outline of investigation for photovoltaic fuses, on their product pages.

How to choose a gPV supplier

Most PV fuse problems come from a mismatch between the fuse, its holder and the project specification, not from the fuse itself. Work through these points before comparing prices.

• Position in the array: string fuses (typically cylindrical) and array or main fuses (typically NH-style blade fuses) are different products.
• DC voltage class: 1000 VDC and 1500 VDC systems need fuses and holders rated for that class; confirm the holder rating as well as the fuse.
• Listing: a US project usually needs UL 248-19 (some specifications still cite UL 2579); international projects usually need IEC 60269-6. Check which one your inspector and owner require.
• Format and holder: 10 x 38, 14 x 51, 10 x 85, 22 x 65 and NH sizes are not interchangeable.
• Lead time and paperwork: large projects often stall on documentation, so ask early for data sheets, time-current curves and certificates.

What to send for a quote

For any supplier, including DENCO, a PV fuse quote needs the maximum system DC voltage (including open-circuit voltage at the lowest expected temperature), string short-circuit current, number of strings in parallel, required fuse ampere rating if the design has fixed it, fuse format or holder type, whether bases are needed, the applicable standard, ambient temperature and enclosure, and quantity and required-by date. DENCO's solar RFQ guide walks through each item.

Frequently asked questions