Description
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General Specifications about Solar Junction Box |
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Key Specifications |
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Rated Voltage: Typically 1500V DC, but can vary. |
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Rated Current: Varies based on the solar panel’s output, often 10A, 15A, 20A, or 25A. |
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Temperature Range: -40°C to +85°C or higher, depending on the application. |
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Ingress Protection (IP) Rating: IP65, IP67, or IP68, indicating protection against dust and water ingress. |
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Cable Size: Typically uses 4mm² (12AWG) stranded wire. |
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Number of Diodes: May contain one or more diodes for bypass or blocking purposes. |
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Connector Type: MC4 connectors are standard, but other compatible connectors may be used. |
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Material: The enclosure is often made of PPO/PPE, offering good insulation and UV resistance. |
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Functional Features: |
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Bypass Diodes: Protect against hotspot damage by allowing current to bypass shaded or damaged cells. |
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Weather Protection: Sealed to prevent ingress of water and dust. |
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Thermal Resistance: Withstands high temperatures generated during panel operation. |
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Important Considerations: |
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Current Rating: Choose a junction box with a rated current higher than the solar panel’s maximum output |
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Environmental Conditions: Select a junction box with a suitable IP rating for the installation location’s climate (e.g., IP67 for areas with high humidity). |
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Connection Method: Ensure the junction box’s connection method (e.g., clamping, soldering) is compatible with the solar panel’s wiring. |
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Technical Specifications of a Solar Panel Junction Box (Common Specifications ( |
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Typical specifications for a solar panel junction box (these values may vary slightly depending on the manufacturer and model). |
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Parameter |
Specification |
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Rated Voltage |
1000 V DC / 1500 V DC |
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Rated Current |
10 A – 20 A (depending on solar panel wattage) |
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Number of Diodes |
3 (Bypass diodes for protection against shading effects) |
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Contact Resistance |
≤ 0.5 mΩ |
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Protection Class |
IP65 / IP67 (Waterproof and dustproof) |
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Flame Class |
UL94-V0 (Flame retardant) |
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Insulation Resistance |
≥ 1000 MΩ (at 1000 V DC) |
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Cable Entry |
2 or 3 cable glands (for +, −, and sometimes grounding) |
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Cable Size Compatibility |
2.5 mm² / 4.0 mm² / 6.0 mm² |
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Connector Type |
MC4-compatible or custom connectors |
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Temperature Range |
-40°C to +85°C |
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Material (Housing) |
High-quality PPO or PA (UV & weather-resistant plastic) |
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Mounting Method |
Adhesive, Clips, or Screws (on the solar panel backsheet) |
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Standards Compliance |
IEC 62790, UL 3730, TUV certified |
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3Qxy Positive & Negative All-in-One Junction Box A2 |
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Product Specifications |
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Rated Voltage |
IEC 1500V/UL1500V |
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Rated Curren |
IEC18A/UL18A IEC20A/UL25A IEC22A/UL30A IEC25A/UL30A IEC30A/UL30A IEC32A/UL32A IEC35A/UL35A |
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Glue Volume |
1*7mL |
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Application Class |
Class A |
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Temperature Range |
-40℃ ~ +85℃ |
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Protection Degree |
IP68 |
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TUV Certificate NO |
R50510013, No.B 077362 0009 Rev.04 |
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UL Certificate NO |
E312223 |
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Flame Class |
5VA |
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3Q-M |
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Product Specifications |
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Rated Voltage |
IEC 1500V/UL1500V |
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Rated Curren |
IEC 20A/25A/30A |
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Glue Volume |
3*8mL(approx.) |
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Application Class |
Class A |
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Temperature Range |
-40℃ ~ +85℃ |
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Protection Degree |
IP68 |
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Size of Ribbons |
Max.8mm |
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Size of Cables |
4mm²/12AWG |
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TUV Certificate NO |
R50510013, NO.B 007362 0009 Rev.03 |
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UL Certificate NO |
E312223 |
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Flame Class |
5VA |
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PV-SC1501 |
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Product Specifications |
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Rated Voltage |
1000VDC |
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Insulation Material |
PPO |
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Connector |
PV-SC01 |
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Contact Material |
Copper alloy,tin plated |
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Bonding mode |
Silica gel |
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The bonding area |
2000mm2 |
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Connection Cable |
A:2*0.3-1.5mm2 / B:1*2.5-4mm2 |
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Width Of Copper Ribbon |
Up to 6mm |
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Protection Degree |
IP65 |
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Protection Class |
ClassII |
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Flame Class |
UL94-V0 |
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Temperature Range |
-40℃-+85℃ |
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Waterproofing structure |
O-ring Sea |
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Width Of Copper Ribbon |
Up to 6mm |
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Connection Method |
Soldering |
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Overall Dimension |
79(65) *78(65）*18mm |
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Connector |
A: PV-SC01 / B: NO |
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