Junction box HiSmart NV821785 unipolar 160A for solar installations

Unipolar junction box HiSmart NV821785 rated 160A, designed for solar photovoltaic systems and DC power connections. It provides a single-pole connection point for cable terminations and branches in electrical distribution systems, suitable for mounting in electrical panels and on a DIN rail. The transparent cover allows visual inspection of the cable connection. The body is made of flame-retardant PA nylon and terminals are brass plated for durability and good conductivity.

Advantages

The junction box supports a nominal current of 160 A and is rated for AC/DC voltages up to 690–1000 V, making it suitable for a range of solar and DC applications. Its transparent cover enables quick verification of connections, while the flame-retardant PA housing (UL94 V0) and brass-plated terminals provide heat resistance, strong insulation and corrosion-resistant contacts. The compact dimensions and DIN-rail mounting simplify installation and wiring organization.

Suitable for

• Solar PV string connections and DC combiner boxes
• Connections between inverters, modules and battery systems
• Electrical panels and DIN-rail mounting in industrial or commercial installations

Key specifications

• Nominal current: 160 A
• Voltage rating: AC/DC 690–1000 V
• Connected cable cross-sections: 1 x (10–35 mm²) or 7 x (2.5–16 mm²)
• Installation: DIN-rail mounting
• Terminals: brass plated
• Body material: PA nylon, flame retardant (UL94 V0)
• Dimensions: 30 x 76.5 x 45.5 mm

How to use

Mount the unipolar junction box on a compatible DIN rail inside the electrical panel. Route and prepare cables according to their specified cross-sections, insert conductors into the appropriate terminal points and secure them using the buckle/terminals. Close the transparent cover to protect the connection while allowing visual inspection. Ensure the installation follows local electrical codes and the system’s voltage and current ratings.

Recommendations

Use the HiSmart NV821785 within its specified current and voltage limits, verify secure terminal tightening and perform periodic inspections through the transparent cover. Avoid exposure to conditions beyond the PA nylon housing’s specifications and follow applicable safety standards for DC solar installations.