The solution is a mechanical and electrical, ruggedized design with convection cooling that environmentally seals the equipment and protects the components. TDI is introducing a complete series of Environmentally Sealed Power Modules (ESPM). The first modules to be released in this series are the highly efficient and ruggedized 1000 W and 2700 W units. These modules are designed to withstand and operate reliably in harsh environments and critical applications. The ESPM series is also electrically hardened to survive severe AC input transients.