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NRZ28

NRZ28

The NRZ28-20 Solar Photovoltaic System Protection Fuse is engineered for DC solar PV applications up to 1000V, providing reliable protection against short circuits and overloads. Compact and efficient, it supports rated currents up to 20A and a breaking capacity of 20–35kA. Designed with DMC-2 and H62 conductive materials, it ensures low power loss and high durability. The gPV fuse link design guarantees full-range DC protection, meeting IEC 60269-6 and GB/T 13539.6 standards, making it ideal for solar array, combiner box, and inverter protection.

Product Information

Application: DC photovoltaic (PV) system short-circuit protection for distribution lines
Rated Voltage: DC 1000V
Rated Current: 2A, 4A, 6A, 8A, 10A, 12A, 15A, 16A, 20A
Breaking Capacity: 20kA / 35kA (for 15A model)
Fuse Link Type: gPV (full-range photovoltaic DC protection)
Rated Dissipation Power: ≤3W
Temperature Rise: ≤70K
Operating Temperature Range: −5°C to +40°C (normal), allowable −35°C to +70°C
Ambient Conditions:
- Relative humidity ≤50% at 40°C (up to 90% at 20°C)
Pollution class: Class III
Altitude: ≤2000m (derating factors: 0.9 at 2500m; 0.8 at ≥3000m)
Material:
- Base: DMC-2 (thermoset resin)
- Conductive parts: H62 copper alloy
Mounting Type: DIN rail (TH35-7.5) or screw mounting
Protection Class: Class III installation category
Compliance Standards: IEC 60269-6, GB/T 13539.6
Certifications: CQC, TUV, CE
Characteristic Curve: Full protection time-current and cutoff curves
Dimensions:
- Fuse base: 81mm max height × 47mm max width × 61mm depth
- Fuse link: 44mm height × 18mm width

Name

Size

Release time

Operate

NRZ28-Fuse-Catalog.pdf

480.79KB

2024-10-23

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Name

Size

Release time

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NRZ28-20,20X_TUV-Certificate.pdf

809.07KB

2025-02-18

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NRZ28-20_CE-Certificate.pdf

316.29KB

2025-02-18

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NRZ28-20_TUV-Certificate.pdf

854.13KB

2025-02-18

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NRZ28_CB-Certificate.pdf

305.21KB

2025-02-18

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FAQs

What is the primary application of the NRZ28-20 fuse?

It’s specifically designed for solar photovoltaic (PV) systems, protecting DC combiner boxes, string circuits, and inverters against short circuits and overloads up to 1000V DC.

Why is the NRZ28-20 classified as a “gPV” fuse?

“gPV” refers to its full-range DC breaking capacity, meaning it can safely interrupt all fault currents—from minor overloads to severe short circuits—making it ideal for PV arrays and DC protection circuits.

Can this fuse operate in high-altitude or outdoor solar installations?

Yes. It maintains stable performance up to 2000m altitude, and can be derated for higher elevations (e.g., 0.9×In at 2500m). The sealed design and high insulation materials make it suitable for both indoor and outdoor PV installations.

How does ambient temperature affect fuse performance?

At ambient temperatures above 40°C, the rated current must be corrected. For instance, at 60°C, the current should be reduced by 22% to ensure proper operation.

How should this fuse be installed?

It can be mounted on a TH35 DIN rail or fixed with screws, depending on cabinet design. Proper ventilation is recommended, and it should be placed in environments free of vibration or condensation.