This series of DC circuit breakers represents high-performance Solar Power Electrical Devices designed specifically for professional protection in solar power and DC power systems, with DC safe interruption, arc suppression, and bidirectional protection as core advantages. They reliably cut off DC current while providing effective overload and short‑circuit protection. By adopting magnetic field control, auxiliary capacitors, and self‑excited commutation technology, these advanced Solar Power Electrical Devices quickly extinguish arcs to significantly improve breaking speed and system reliability.Furthermore, they support bidirectional fault current interruption to realize full‑coverage protection of DC transmission lines, integrating filtering and surge‑absorbing capacitors for a simplified structure and higher operational efficiency. Engineered to withstand demanding environments, these solutions are widely used in photovoltaic power generation, energy storage systems, and various DC power scenarios to ensure the long-term stable and safe operation of complex DC circuits worldwide.