From the wall to your devices this VIPER17HD AC to DC converter from STMicroelectronics will help convert power. 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.