If you need to change from AC to DC voltage use the VIPER16HD AC to DC converter from STMicroelectronics. This AC to DC power converter supports off-line switcher topology. In order to ensure parts aren"t damaged by bulk packaging, this product comes in tube packaging to add a little more protection by storing the loose parts in an outer tube. This AC to DC power converter has an operating temperature range of -40 °C to 150 °C.