The AVQ300-48S12B-6L is a quarter-brick isolated DC-DC converter rated at 300 watts, designed to provide a regulated low-noise 12V output for feeding downstream point-of-load converters in distributed power architectures. It features a wide 2:1 input voltage range of 36 to 75 VDC, optimized for 48V telecommunications equipment supplies, and can deliver up to 25 amps with 95% efficiency. The converter operates across an ambient temperature range of -40°C to +85°C, incorporates 1500 VDC minimum input-output isolation, and includes protection features such as hiccup overvoltage protection and auto-restart overtemperature protection. With low ripple and noise characteristics, fixed 145 kHz switching frequency, and high capacitive load capability, it is well-suited for high-density, space-constrained applications requiring reliable power distribution in telecommunications, data center, and industrial systems.