YUANKY NQ-40 Series DC Isolated Switch is a high-performance electrical isolation device specially engineered for photovoltaic (PV) and industrial DC power systems, delivering reliable circuit disconnection and safety protection for high-voltage DC applications. With a rated insulation voltage of 1500V and rated impulse withstand voltage of 8000V, it provides robust insulation performance to withstand voltage surges and ensure operational safety. This series supports 2-pole and 4-pole configurations, with a rated thermal current of 32A and 1000A rated short-circuit making capacity, meeting the protection requirements of medium-power DC systems.

Designed for harsh outdoor environments, the NQ-40 switch features an IP66 protection rating for shafts and mounting holes, effectively preventing dust ingress and water spray. It operates stably across an ultra-wide temperature range from -40℃ to +85℃, adapting to extreme climate conditions worldwide. The switch supports solid, flexible and multicore cables with cross-sections from 2.5mm² to 6mm², with clearly defined tightening torques for terminals and mounting screws to ensure secure and standardized installation. Its intuitive knob design (OFF at 9 o’clock, ON at 12 o’clock) enables quick and safe manual operation, while a mechanical life of 10,000 cycles guarantees long-term durability.

The NQ-40 series is primarily used in photovoltaic power generation systems, serving as a critical isolation component in grid-tied and off-grid PV power stations, PV inverters, DC distribution cabinets and combiner boxes. It allows safe disconnection of PV arrays during maintenance, troubleshooting and emergency shutdowns, protecting personnel and equipment from electrical hazards. Additionally, it is widely applied in battery energy storage systems, telecom base stations, industrial DC control systems and solar water pumping systems.

With excellent environmental adaptability, reliable electrical performance and easy installation, YUANKY NQ-40 DC Isolated Switch provides a cost-effective and safe DC isolation solution for global PV installers, system integrators and new energy equipment manufacturers, ensuring stable operation of DC power systems in various complex scenarios.