DIN-Rail Switch-Mode Power Supplies are compact, high-efficiency power conversion units engineered to mount directly onto standard 35mm DIN rails inside industrial control cabinets. Designed to convert fluctuating high-voltage AC mains power or high-voltage DC into clean, regulated 24V DC or 12V DC auxiliary voltage, these devices deliver steady electrical current to PLCs, sensors, drives, and edge devices. Key hardware features typically include wide-range AC/DC input voltage acceptance, active power factor correction (PFC), internal overload and overvoltage protection circuits, adjustable DC output voltage potentiometers, and diagnostic DC-OK relay contacts.