HP 0957-0050 - Switching power supply (Yokogawa PS890-0101) - 110-220VAC input, 47-63Hz - Eight DC outputs, 571 watts Retail
HP 0957-0001 - Switching power supply - 140-278VAC input, 47-67Hz - Three DC outputs, 200 watts Retail
HP 0957-0051 - Switching power supply - 140-278VAC input, 47-67Hz - Three DC outputs, 440 watts - Includes 25KHz module and battery backup Retail
HP 0957-0060 - DC-DC converter module (Yokogawa PS603) - 185-400VDC input - 24VDC output, 325 watts - Supply for the fan power Retail