Altech PSD Series Power Supplies feature a small size, universal input, high efficiency, and low ripple and noise. These power supplies offer a 90VAC to 264VAC input voltage range, 47Hz to 63Hz frequency, and up to 48VDC voltage rating. The PSD series is available in four options with different power ratings as shown by the numbers at the end of the series name: PSD-15, PSD-30, PSD-60, and PSD-100. Altech PSD Series Power Supplies have a number of protections, including overload, overvoltage, and short circuit.