ELTEK Flatpack S 36/1000 HE UI rectifier Applications in these markets demand state-of-the-art, reliable, and safe DC power systems. Flatpack S delivers an industry-leading power density in its segment, many safety functions, a wide operating temperature range, and superb reliability in its small 217mm deep housing. Used in the 3U rack with Smartpack S controller, the Flatpack S rectifiers cover 2 to 8kW applications using a minimum of space, less than 18 liters, and low heat dissipation.