The G13805NU is a high-performance 13.8V DC switch-mode power supply module designed for security, CCTV, access control, and other low-voltage electronic systems. Delivering up to 5A of regulated output current, it supports connected equipment while simultaneously providing standby battery charging for uninterrupted operation during mains power failures. The unit features a universal 90–264V AC input range, electronic overload and short-circuit protection, mains transient protection, low ripple output, and status indication LEDs. Its compact, unboxed design allows flexible installation, including DIN-rail mounting, making it suitable for a wide range of professional security and life-safety applications.