Istič HiSmart NV821679 4-pólový 63 A 1000 V DC

HiSmart NV821679 is a 4-pole DC miniature circuit breaker rated for 63 A and up to 1000 V DC. Designed for protection and switching in DC installations, it interrupts overloads and short-circuit faults in photovoltaic arrays, battery systems and other DC applications. The device has a compact modular housing for simple mounting on a 35 mm DIN rail and provides a visible contact position indicator for quick status checks.

Advantages

The breaker offers a high rated voltage of up to 1000 V DC and an ultimate breaking capacity of 6 kA, ensuring reliable interruption of short-circuit currents. Its thermomagnetic trip mechanism combines overload and short-circuit protection. Modular construction and standard DIN-rail installation simplify integration into existing electrical panels. The product meets IEC/EN 60947-2 requirements and complies with EU RoHS.

Suitable for

• Photovoltaic (PV) arrays and solar power systems
• Battery energy storage systems
• Industrial DC distribution and control panels
• Commercial and civil DC installations
• Telecommunication DC power systems

Key specifications

• Number of poles: 4
• Rated current (In): 63 A
• Rated operational voltage (Ue): DC 1000 V
• Insulation voltage (Ui): 1200 V
• Ultimate breaking capacity (Icu): 6000 A
• Rated impulse withstand voltage (Uimp): 4000 V
• Tripping type: Thermomagnetic
• Mechanical life: 20,000 cycles
• Electrical life: 1,500 cycles
• Protection class: IP20
• Wire cross-section: 2.5–25 mm²
• Installation: 35 mm DIN rail
• Operating temperature: -35 °C to +70 °C
• Storage temperature: -40 °C to +85 °C
• Dimensions: 71.2 × 82 × 78 mm
• Standards: IEC 60947-2 / EN 60947-2

How to use

Mount the HiSmart NV821679 on a standard 35 mm DIN rail and connect DC conductors according to the marked terminals, ensuring correct polarity and secure tightening within the specified wire cross-section range (2.5–25 mm²). Verify system voltage does not exceed the rated 1000 V DC and follow applicable wiring and isolation procedures before energizing. Use the visible contact position indicator (red = closed, green = open) to confirm breaker status during commissioning and maintenance.

Recommendations

For reliable operation, select this breaker for DC circuits within the specified ratings and environments. Install in dry, ventilated switchgear enclosures, protect against unauthorized access, and perform periodic inspections; replace the device if mechanical or electrical operation limits are exceeded.