500A Solar PV Thermal Fuse

The 500A Solar PV Bolt-On Fuse is a high-capacity, gPV-rated DC protection device engineered specifically for utility-scale solar farms, central inverters, and high-energy Battery Energy Storage Systems (BESS). Operating at voltages up to 1500VDC, this heavy-duty fuse provides full-range protection against low overloads and catastrophic short-circuit faults up to 250kA, preventing thermal runaway and safeguarding multi-megawatt DC power distribution networks. 

96% Alumina Ceramic Body: Built using industrial C799-grade alumina ceramic, providing a tensile strength exceeding 250MPa and thermal shock insulation up to 400°C. This prevents catastrophic body shattering or gas leakage during extreme high-energy 1500V short-circuit interruptions.
99.99% Pure Silver Elements: Features multi-bridge silver elements stamped with micron-level precision. The integration of low-melting-point alloy dots (M-effect) ensures the fuse responds safely to low-level overcurrents before heat damages surrounding busbars.
Compacted Quartz Sand Matrix: Filled with chemically washed, high-density quartz sand. Automated vibration-filling lines eliminate air pockets, ensuring instant arc-cooling, minimal pressure buildup, and complete containment of localized plasma arcs. 

We offer robust customization capabilities to align with your system design and local grid codes:

Terminal Configurations: Customizable bolt hole spacing, blade thickness, and integrated visual trip indicators (microswitch compatibility available for remote fault signaling).
Private Labeling: High-resolution CNC laser marking for custom branding, internal inventory SKU numbers, QR codes, and region-specific compliance logos with zero fading under high temperatures.
Flexible Current Calibration: Specialized rating calibrations for high-altitude solar deployments or extreme desert ambient environments. 

Every production batch undergoes a rigorous QA/QC protocol before leaving our facility to eliminate infant mortality in the field:

100% Automated cold resistance calibration.
X-Ray inspection of internal silver element alignment and sand compaction density.
Calibration verification using high-current injection testers.
Full batch traceability via laser-etched barcodes on each fuse body. 

Established in 1988, Zhejiang Chifeng Electric Co., Ltd. is a premier manufacturer dedicated to pioneering fuse technology and delivering high-reliability circuit safety solutions globally.

Decades of Industry Expertise:
Backed by over 35 years of specialized fuse manufacturing experience, trusted by 1,200+ clients worldwide.
Robust Technical Barriers:
Armed with 48 authorized patents (including core invention patents) and 159 qualification certificates, supported by a 65% automation rate in production.
Global Compliance & Certifications:
Formally ISO9001 certified. All products fully comply with IEC 60269 and GB 13539 standards, and hold prestigious international safety marks including CCC, CE, CB, TÜV Rheinland, and UL.
End-to-End Capability:
Operating from a 16,000 m² state-of-the-art facility, we house an in-house R&D center, a dedicated testing lab, and high-precision breaking capacity test systems.
Direct-from-Manufacturer Advantage:
Factory-direct sales model minimizes intermediary markups, ensuring top-tier quality with optimal cost efficiency. 

Industrial Export Packaging: 1 PC per protective bubble wrap package, 20 PCS per heavy-duty double-corrugated master carton. Carton dimensions: 40 x 30 x 25 cm. Gross Weight: Approximately 16.5 kg per carton.
Pallet Sealing: Packed on ISPM-15 heat-treated fumigation-free wooden or plastic pallets, completely bound with heavy-duty edge protectors and anti-moisture stretch film.
Global Shipping Timelines: Standard 500A specifications are kept in raw stock; shipping takes 5-7 business days. Large custom bulk orders (over 5,000 PCS) require a production lead time of 20-25 days.
Trade Terms Supported: FOB, CIF, EXW, and DDP via reliable ocean, air, or rail freight. All necessary customs paperwork (Certificate of Origin, Form E, SGS Test Reports) is provided standard.