183-657, MEAN WELL, MEAN WELL DC-DC Converter, 24V dc/ 4.2A Output, 36 → 72 V dc Input, 100W, Chassis Mount, +60°C Max Temp -10°C MEAN WELL DC-DC Converter, 24V dc/ 4.2A Output, 36 → 72 V dc Input, 100W, Chassis Mount, +60°C Max Temp -10°C