Sinofuse PV312 Series
gPV Rated DC Fuses for Solar Applications
Product Overview
The Sinofuse PV312 Series represents the latest generation of photovoltaic fuses, specifically engineered for solar applications. These gPV-rated fuses provide reliable protection for string circuits, combiner boxes, and inverter applications in both residential and utility-scale solar installations.
Key Features
gPV Rating
Specifically designed and rated for photovoltaic applications
Temperature Cycling Resistance
Excellent performance under extreme temperature variations
High Voltage DC Capability
Designed for high-voltage DC solar system applications
Long Service Life
Engineered for 25+ year solar system lifetime
Technical Specifications
Available Current Ratings
Solar Applications
String Protection
Individual string circuit protection in residential and commercial solar installations.
Combiner Boxes
Multiple string combining and protection in medium to large-scale solar arrays.
Inverter Protection
DC side protection for central and string inverters in utility-scale installations.
Why Choose PV312 Series?
Superior Performance
- Optimized for photovoltaic DC applications
- Excellent temperature cycling performance
- Low aging and drift characteristics
- Reliable operation in harsh outdoor environments
Compliance & Safety
- IEC 60269-6 and UL 2579 certified
- gPV rating for photovoltaic applications
- Meets international safety standards
- Suitable for grid-tie applications
Application Guide
Selecting the right fuse for your photovoltaic system is crucial for ensuring safety, reliability, and compliance with industry standards. This guide provides step-by-step instructions for proper fuse selection and installation for various solar applications.
Determine System Parameters
Calculate the maximum circuit current based on your solar panel specifications and system configuration. For PV systems, the maximum circuit current is typically 1.25 times the short-circuit current (Isc) of the PV module.
Select Appropriate Voltage Rating
Ensure the fuse voltage rating meets or exceeds the system voltage. The PV312 series is rated for both 1000V DC and 1500V DC systems, making it suitable for a wide range of installations.
Choose Current Rating
Select a fuse with a current rating that is higher than the maximum continuous current but low enough to protect the circuit conductors. Refer to the current ratings table for available options.
Verify Breaking Capacity
Ensure the fuse can safely interrupt the maximum fault current that could occur in your system. The PV312 series offers 80A breaking capacity at 1000V DC.
Consider Environmental Factors
Evaluate environmental conditions such as temperature extremes, humidity, and UV exposure. The PV312 series is designed for -40°C to +85°C operation and excellent temperature cycling resistance.
Selection Manual
String Fuse Selection
| System Type | Recommended Part | Current Rating |
|---|---|---|
| Residential (≤10kW) | PV312-15A | 15A |
| Commercial (10-100kW) | PV312-20A | 20A |
| Medium Scale (>100kW) | PV312-25A | 25A |
Note: For systems with high module count per string or high irradiance conditions, consider using the next higher current rating.
Combiner Box & Inverter Protection
| Application | Recommended Part | Current Rating |
|---|---|---|
| DC Combiner Boxes | PV312-25A | 25A |
| Inverter DC Input | PV312-30A | 30A |
| 1500V Systems | PV312-30A | 30A |
Note: Always verify your specific requirements with our FAE team for complex system designs.
Need Help with Selection?
Our solar specialists can help you choose the perfect fuse for your specific application.
Contact Solar FAE TeamDocumentation & Support
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